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HomeMy WebLinkAboutFiles 2010 Shine HUB and Wahl Extraction Area.pdfMicrosoft Word - Shine HUB and Wahl Extraction Area.docx 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 June 8, 2011 Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, Washington 98368 Attention: Michelle Farfan Subject: Groundwater, Surface Water and Precipitation Monitoring Shine HUB and Wahl Extraction Area Jefferson County, Washington File No. 1355-035-00 It is our understanding that Miles Sand & Gravel Company will be submitting an application to request modifications to the existing permit conditions pertaining to stormwater at the Wahl Extraction Area. The purpose of this letter is to evaluate the water monitoring program for the Shine HUB and Wahl Extraction Area and, if warranted, propose modifications to the program at the same time. The following letter examines whether the past and current groundwater and surface water monitoring conducted for the Wahl Extraction Area located in Jefferson County, Washington, meets the conditions set forth in the permit and ordinance related to future mining operations. The conditions are set forth by Jefferson County Department of Community Development (DCD) in the Wahl Permit (MLA03-0037) dated July 18, 2005 prepared originally for Fred Hill Materials (FHM) and Ordinance 08-0706-04 (MLA10-00073), Amendment 09-1213-10 dated December 18, 2010. Recommendations for future monitoring at the site are also provided in this letter. CURRENT ORDINANCE AND PERMIT CONDITIONS The purpose of the monitoring program is to collect precipitation, groundwater and surface water data to establish baseline hydrologic and hydrogeologic conditions at the Wahl Extraction Area and to provide a basis for evaluating potential impacts due to future mining operations. In addition, the groundwater monitoring will be conducted to establish a seasonal high water table level. Permit MLA03-0037 page 24, paragraph C states: Prior to the extraction of material from the Wahl Extraction Area, a groundwater and surface monitoring program prepared to DCD specifications shall be submitted to DCD for review and approval. The monitoring program will be prepared by an independent consultant selected by DCD, but at FHM expense. The monitoring program may include additional test/monitoring wells, Jefferson County DCD | June 8, 2011 Page 2 File No. 1355-035-00 rain gauges, and stream monitoring stations for Thorndyke Creek and the unnamed tributary. Groundwater levels shall be monitored weekly for a year once mining commences in the Wahl Extraction Area, and then monthly thereafter to ensure that mineral extraction does not occur within 10 feet of the actual seasonal high water table level (per Condition 11 of Ordinance 08-0706-04). Groundwater monitoring data and stream elevation and flow data shall be collected at a minimum throughout the duration of when mineral extraction is occurring in the Wahl Extraction Area. The monitoring data will be provided to the Washington State Department of Fish & Wildlife, the WA State Department of Ecology, the S'Klallam & Skokomish Tribes, and interested parties. This data will be analyzed and input will be sought prior to the issuance of any additional stormwater permits in Group 2 and 3, which may include adaptive management measures (such as raising the separation between mining and the seasonal groundwater level if impacts to in-stream flows are identified). In addition, prior to issuance of stormwater permits for mining in Group 2 and 3, a new threshold determinations will be required. (Sections 4.24(3) & 8.10(8) of the UDC). Ordinance 08-0706-04, Amendment 09-1213-10, Attachment A, paragraph 11 states: Mining will be limited to a maximum depth of ten (10) feet above the seasonal high water table, which shall be established and monitored pursuant to standard techniques and verified through independent review as arranged by the County at the applicant’s expense. PREVIOUS AND CURRENT MONITORING The original monitoring, initiated in August 2005, was conducted by CR Hydrogeologic Consulting for Fred Hill Materials. GeoEngineers assumed the monitoring duties in November 2009 when Miles Sand & Gravel Company commenced leasing the operations at the Shine HUB and the Wahl Extraction Area. The following are elements of the current monitoring program: Precipitation ■ A weather station was established on the roof of the office building at the current Shine HUB in September 2005. The data, collected on an hourly basis, includes precipitation, temperature and wind direction and speed. The weather station is still functional and provides reliable data. Groundwater ■ Groundwater-level monitoring at the Wahl Extraction Area began in August 2005 with the installation of a pressure transducer and datalogger in Well 9, a monitoring well located in the southwest portion of the Wahl Extraction Area. The automated equipment records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The monitoring equipment is still functioning and has provided reliable data. ■ A pressure transducer and datalogger was installed in the Shine HUB water-supply well in April 2007. The equipment malfunctioned in June 2010 and was replaced in September 2010 with new equipment from the same manufacturer. The automated equipment records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. With the exception of a few months in 2010, the monitoring equipment has provided reliable data. Jefferson County DCD | June 8, 2011 Page 3 File No. 1355-035-00 ■ In January 2010, additional monitoring points of Wells 5 and 8 were added by Miles Sand & Gravel Company to be able to estimate a groundwater surface beneath the Wahl Extraction Area. The installed equipment is of the same manufacturer as the equipment installed in Well 9 and the Shine HUB well. The automated equipment records groundwater levels on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The monitoring equipment provides reliable data. Surface Water ■ Three surface water stations were established in September 2005 on Thorndyke Creek near the Wahl Extraction Area. One of the stations is located on an unnamed tributary and two are located on Thorndyke Creek above and below the confluence of the unnamed tributary. The stream stage height is recorded on an hourly basis using automated equipment. The streamflow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ An additional surface water monitoring point is located on Thorndyke Creek approximately 1 mile upstream of its mouth. The stream stage height is recorded on an hourly basis using automated equipment. The stream flow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. SUMMARY It is our opinion that the monitoring data being collected at the Wahl Extraction Area meets or exceeds the requirements stated in the permit and ordinance pertaining to monitoring. When the permit and ordinance were issued, it was anticipated that mining in the Wahl Extraction Area would commence prior to acquiring significant groundwater data. However, mining has not yet commenced to date and several years of background groundwater and surface water data have been acquired. In addition, Miles Sand & Gravel Company has improved upon the monitoring program established in 2005 by adding two groundwater monitoring points, replacing and upgrading failing equipment, and adjusting the locations of surface water monitoring points to better record stream gage heights. The data will provide baseline hydrologic and hydrogeologic conditions for the area and can be used to establish a seasonal high water table. The use of automated dataloggers facilitates the collection of more data than was anticipated in the permit conditions, both in terms of frequency and locations. Because there is a near continuous record of groundwater levels at the Shine HUB and Wahl Extraction Area since August 2005, there is no need to measure the groundwater levels on a weekly basis as stated in MLA03-0037, page 24, paragraph C. The current monitoring program exceeds this requirement by recording groundwater levels on an hourly basis with the instrumentation installed in the three monitoring wells located within the Wahl Extraction Area. Jefferson County DCD | June 8, 2011 Page 4 File No. 1355-035-00 RECOMMENDATIONS The following are our recommendations for future monitoring: Monitoring Program ■ Maintain the Shine HUB weather station. If the facilities at the Shine HUB are moved to near the Wahl Extraction Area, the weather station should also be moved and reestablished. ■ Continue to monitor groundwater levels in three monitoring wells using the installed transducers that record water levels hourly. On a quarterly basis, download the recorded water level data, manually measure the water level for calibration, and service the instruments. If Wells 5, 8 and 9 are encroached upon by mining operations, they each should be replaced by comparable existing monitoring wells or new monitoring wells installed outside the proposed mining area. ■ Continue monitoring groundwater at the Shine HUB water supply well using the installed transducer. On a quarterly basis, download the recorded water level data, manually measure the water level for calibration, and service the instrument. When this well is no longer used for the sand and gravel facility, the transducer will be removed and groundwater level monitoring at this location will be terminated. ■ A new water supply well will be installed near the processing area adjacent to the Wahl Extraction Area. Prior to use, a transducer will be installed in this well to monitor groundwater levels. ■ Continue to monitor surface water at the four stream locations. On a quarterly basis, download the recorded staff height data, record stage height for calibration, and wade the stream to measure streamflow. Reporting ■ On an annual basis, submit a memorandum to Jefferson County DCD. The memorandum will include hydrographs of the complete datasets for precipitation, groundwater levels, stream stage heights and streamflow measurements. The memorandum will also include a summary of any instrumentation modifications, data loss, or significant events that occurred within the monitoring year. The submittal will also include the complete datasets as spreadsheets on a compact disk. It is our intent for this process to be as straightforward and open as possible. We are comfortable providing the recommendations noted herein as we feel they exceed standard monitoring and reporting procedures for this type of project. 2013 Shine Facility - Wahl Extraction Area Groundwater Report.pdfLetter Report 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 February 28, 2014 Miles Sand & Gravel Company 400 Valley Avenue NE Puyallup, Washington 98372 Attention: Mike Schuh Subject: Letter Report 2013 Groundwater, Surface Water and Precipitation Monitoring Data Shine Facility – Wahl Extraction Area Jefferson County, Washington File No. 1355-035-00 Monitoring requirements at the site were set forth by Jefferson County Department of Community Development (DCD) as conditions of the Wahl Permit (MLA03-0037), dated July 18, 2005, prepared originally for Fred Hill Materials (FHM), and Ordinance 08-0706-04 (MLA10-00073), Amendment 09-1213-10, dated December 18, 2010. The purpose of this letter is to provide a summary of the water monitoring program implemented for the WEA as of the most recent data download event on January 31, 2014 and to compare the high groundwater table elevations with the proposed excavation elevations at the WEA. PREVIOUS AND CURRENT MONITORING The original monitoring, initiated in August 2005, was conducted by CR Hydrogeologic Consulting, working for FHM. GeoEngineers assumed the monitoring duties in November 2009 when Miles commenced leasing the operations at the WEA. The monitoring locations are shown on Figure 1. The following are elements of the current monitoring program: Groundwater ■ Groundwater-level monitoring at the WEA began in August 2005 with the installation of an automated water-level sensor (consisting of a combined pressure transducer and datalogger) in MW-9, a monitoring well located in the southwest portion of the WEA. The automated sensor measures and records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The monitoring equipment is still functioning and has provided reliable data. Miles Sand & Gravel Company | February 28, 2014 Page 2 File No. 1355-035-00 ■ A water-level sensor was installed in the Shine Hub water-supply well in April 2007. The sensor malfunctioned in June 2010 and was replaced in September 2010 with new equipment from the same manufacturer. With the exception of a few months in 2010 and 2013, the monitoring equipment has provided reliable data. ■ In January 2010, additional monitoring wells (MW-5 and MW-8) equipped with sensors were added by Miles to estimate a groundwater surface profile beneath the WEA. The installed sensors are from the same manufacturer as those installed in MW-9 and the Shine Hub well. The current monitoring equipment has provided reliable data. ■ In 2012, MW-5 was deepened to explore for a groundwater supply for the facility. The exploration was unsuccessful and MW-5 was decommissioned. Thus, the water level sensor from MW-5 was moved to MW-15 on February 15, 2012. MW-15 is located approximately 550 feet south of the proposed mining area and now provides a monitoring point for the southern portion of the WEA. ■ During the second-quarter site visit of 2013, it was discovered that the transducer in the Shine Hub water-supply well had stopped functioning on February 1, 2013. The transducer was repaired and reinstalled on July 1, 2013 during the third-quarter visit. Surface Water ■ Three surface-water monitoring stations were established in September 2005 on Thorndyke Creek near the WEA. One of the stations (Station 3) is located on an unnamed tributary and two are located on Thorndyke Creek, with Station 2 located upstream and Station 1 downstream of the confluence with the unnamed tributary. The stream stage height at each station is recorded on an hourly basis using an automated sensor. The streamflow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ An additional surface-water monitoring point (Station 4) is located on Thorndyke Creek approximately 1 mile upstream of its mouth. The stream stage height is recorded on an hourly basis using an automated sensor. The stream flow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ The automated equipment previously installed at the surface-water monitoring stations was replaced with more reliable sensors at all four stations in 2011 and 2012. Precipitation ■ A weather station was established on the roof of the office building at the Shine Hub in September 2005. The data, collected on an hourly basis, includes precipitation, temperature and wind direction and speed. Between March 14 and October 17, 2012, the weather station experienced a loss of data. Miles has reportedly implemented periodic data downloads to minimize potential future loss of data. Except for a period between February 7 and March 31, 2013 during operations reorganization, the weather station is functional and once again is providing reliable data. Miles Sand & Gravel Company | February 28, 2014 Page 3 File No. 1355-035-00 MONITORING DATA SUMMARY The latest set of monitoring data was collected at the WEA on January 31, 2014. GeoEngineers has developed plots of the monitoring data described below. Several years of background groundwater, surface water and precipitation data have now been acquired. Groundwater Data The elevations of the groundwater monitoring points (rims of the well casings) have been surveyed relative to the National Geodetic Vertical Datum (NGVD) 1929 datum. The water levels measured in each monitoring well have been converted to groundwater elevations. Figure 2 shows a plot of groundwater elevations from the four monitoring wells and the Shine Hub water-supply well. The water-supply well is located near the office buildings at the Shine Facility (Figure 1). Monitoring wells MW-5, MW-8 and MW-9 are located within the WEA; monitoring well MW-15 is located approximately 550 feet south of the WEA. Shine Hub Water Supply Well The hourly data from the Shine Hub water supply well are shown on Figure 2 as points because the well pump cycles on and off several times a day. The lowest water level elevations in the Shine Hub water supply well represent pumping water levels and the highest represent fully or nearly recovered water levels. The data in-between represent water levels that are either recovering or are being drawn down at various stages of the pumping cycle. The highest levels show a pattern similar to the other monitoring wells described below that are located over a mile west of the Shine Hub well. In 2013, non-pumping water levels ranged from Elevations 254.7 to 256.2 feet. Monitoring Wells MW-5, MW-8, MW-9 and MW-15 The dataset with the longest period of record is for monitoring well MW-9, beginning in August 11, 2005. The groundwater elevations in all the wells show similar seasonal fluctuations of rising levels in the winter wet months and declining levels between spring and fall. During the winter of 2008-09, there was below-normal precipitation that was indicated by a decline in water levels from between early 2008 and late 2009. The highest groundwater elevations were all recorded in 2013. These groundwater elevations were 278.38, 279.48 and 254.71 feet NGVD for MW-8, MW-9 and MW-15, respectively. In 2013, water levels in MW-8 ranged from Elevations 274.22 to 278.38 feet, water levels in MW-9 ranged from Elevations 275.21 to 279.48 feet and water levels in MW-15 ranged from Elevations 252.86 to 254.71 feet. Surface Water Data Figure 3 shows a plot of the surface water data for Station 1 located on Thorndyke Creek southwest of the southernmost extent of the WEA, as a typical example of the surface water datasets (other datasets are available upon request). An elevation of 233 feet NGVD is estimated at Station 1 based on the U.S. Geologic Survey topographic map. Figure 3 shows the stage heights as recorded at a 30-minute interval using dataloggers. The stage height dataset had three relatively short periods in 2010 and 2011 when the data was lost due to faulty monitoring sensors. The equipment was replaced in early 2012 with more reliable sensors. Short-term changes in stage height reflect variations in streamflow; however, the Miles Sand & Gravel Company | February 28, 2014 Page 4 File No. 1355-035-00 long-term increase in stage height observed at Station 1 likely reflects aggradation of sediment in the streambed, and does not translate into an overall increase in streamflow. Figure 3 also shows the streamflow rates calculated from flow velocities that were measured by wading the stream; these are plotted on a logarithmic vertical scale (right-hand axis). The highest recorded flow at Station 1 was 56.27 cubic feet per second on January 4, 2008 and the lowest flow was 0.7 cfs on October 11, 2012. Precipitation Data Figure 4 shows a plot of the daily precipitation at the weather station located on the roof of the Shine Hub office. The highest recorded daily precipitation event was 3.11 inches on December 3, 2007. Rainfall in 2013 was below normal, especially during November and December. GROUNDWATER ELEVATIONS VERSUS PROPOSED EXCAVATION FLOOR The proposed excavation elevations are shown on the attached plan titled “WDNR Permit No. 70-013024 Final Reclamation Map” as prepared by Team 4 Engineering. The plan shows that the excavation will stay 10 feet above the high groundwater table, as a currently required condition, in the central and north portions of the WEA. For example, the highest recorded groundwater elevation at MW-9 was Elevation 279.48 feet and the proposed excavation there is Elevation 290 feet. Miles proposes to excavate to Elevation 275 feet in the southernmost extent of the WEA. Prior to 2012, there was a lack of groundwater monitoring data points in this area. Monitoring of MW-15, located approximately 550 feet south of the southern WEA mining disturbance boundary (Figure 1), indicates that the highest water level recorded at MW-15 was Elevation 254.71 feet. Based on a uniform slope to the water table between MW-9 and MW-15, the high groundwater elevation would be approximately Elevation 259 feet at the southern mining disturbance boundary and approximately Elevation 264 feet at the northern extent of the 275-foot excavation elevation contour shown on the Reclamation Map (Attachment 1). Thus, the proposed excavation elevation of Elevation 275 feet will be greater than 10 feet above the highest groundwater table based on available data. CONCLUSIONS Monitoring data for groundwater, surface water and precipitation at the Wahl Extraction Area are being collected by GeoEngineers on an ongoing basis to develop an extensive background data set, as required under permit conditions and local ordinances. Data have been collected since 2005, and additional groundwater monitoring locations installed in 2009 have allowed the estimation of a groundwater elevation profile beneath the planned mining area. Based on the groundwater data collected to date, the gravel mine excavations proposed by Miles Sand & Gravel Company at the Wahl Extraction Area are 10 feet or greater above groundwater table elevations projected from the highest recorded groundwater levels. Miles Sand & Gravel Company | February 28, 2014 Page 5 File No. 1355-035-00 Please contact us if you have any questions about the water monitoring program. Sincerely, GeoEngineers, Inc. Joel W. Purdy, LG, LHG, CWRE Senior Hydrogeologist Michael A.P. Kenrick, PE, LHG Principal Hydrogeologist JWP:MAPK:lc Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. Copyright© 2014 by GeoEngineers, Inc. All rights reserved. Attachments: Figure 1. Vicinity Map Figure 2. Groundwater Data Figure 3. Surface Water Data Figure 4. Precipitation Data, Shine Hub Weather Station Attachment 1. Wahl Reclamation Map & ( E D E D E D E D @ A @ A @ A @ A @ A Shine Hub Weather Station MW-15 MW-8 MW-5 MW-9 Shine Hub Water Supply Well Wahl Lake Rd Thorndyke Rd U V 104 Thorndyke Rd S Point Rd Peabody Way Thorndyke Rd µ Vicinity Map Figure 1 Shine Facility - Wahl Extraction Area Jefferson County, Washington ! ^ Olympia § ¨ ¦ 90 § ¨ ¦ 5 § ¨ ¦ 405 £ ¤ 101 Olympic NP Washington 3,000 3,000 0 Feet Data Sources: ESRI Data & Maps, Street Maps 2005 Notes: 1. The locations of all features shown are approximate. 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 3. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without permission. Transverse Mercator, State Plane South, North American Datum 1983 North arrow oriented to grid north Office: TACOPath: W:\Tacoma\Projects\1\13 55035\GIS\135503500_F1.mxdMap Revised: 17 February 2014 syi E D E D E D Station 1 Station 2 Station 3 200 200 0 Feet Station 1 Station 3Station 2 Station 4 Legend @ A Monitoring Well E D Stream Gage & ( Shine Hub Weather Station Wahl Extraction Area MW-5 Station 1 Thomdyke Creek Creek Monitoring well MW-15 not surveyed; top of casing elevation of 304.56 based on elevation data provided by Fred Hill Materials. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 1. 2. Notes: Groundwater Data Shine Facility – Wahl Extraction Area Miles Sand and Gravel Company Figure 2 TACO: \1\1355035\00\Finals\2013 Annual Report_Figures 2 through 4.pptx MAPK:JWP:jwp 021714 This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 1. Notes: Surface Water Data Shine Facility – Wahl Extraction Area Jefferson County, Washington Figure 3 TACO: \1\1355035\00\Finals\2013 Annual Report_Figures 2 through 4.pptx MAPK:JWP:jwp 021714 Installed INW PT2X Precipitation data from the period 3/14/12 to 10/17/12 missing due to weather station data loss. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 1. 2. Notes: Precipitation Data Shine Hub Weather Station Shine Facility – Wahl Extraction Area Jefferson County, Washington Figure 4 TACO: \1\1355035\00\Finals\2013 Annual Report_Figures 2 through 4.pptx MAPK:JWP:jwp 021714 Data loss between March 14 and October 17, 2012 and between February 7 and March 31, 2013 ATTACHMENT 1 Wahl Reclamation Map 2016 Miles Wahl Quarterly Inspection.pdfMicrosoft Word - 2016 Miles Wahl Quarterly Inspection.docx 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 March 22, 2017 Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, Washington 98368 Attention: David W. Johnson Subject: 2016 On-Site Inspection of Miles Sand & Gravel Company, Shine Facility Wahl Extraction Area, WDNR Permit No. 70-013024 Jefferson County, Washington File No. 1355-035-00 This letter presents the results of the quarterly on-site inspection of the Shine Facility operated by Miles Sand & Gravel Company (Miles). Conditions 7 and 9 of Jefferson County Ordinance 08-706-04, amended by Jefferson County Ordinance 09-1213-10, require the submittal of a quarterly inspection report regarding mining operations located within a designated Aquifer Recharge Area. The intent is for this letter to satisfy the requirements of Conditions 7 and 9 and to present the results of the quarterly inspections in 2016. GeoEngineers, Inc. (GeoEngineers) conducted a review of workings for 2016 at the Wahl Extraction Area (WEA) within the Shine Facility on a quarterly basis. The last site visit was on January 13, 2016 when Paul Robinette, a Staff Environmental Scientist with GeoEngineers, Ryan Ransavage, Environmental Specialist for Miles conducted a tour of the operations. Mr. Ransavage showed the boundaries of the permitted excavation area. The boundaries of the permitted area are marked with PVC posts that extend 6 to 10 feet above ground. These posts were readily observed from a distance. The excavations, plant operations and mining activities were all occurring within the marked boundary. No reclamation has occurred within the WEA since the extraction process had commenced in April 2013. However, the mined area is at or near the permitted 40 acres, and reclamation is planned to begin in 2017. Stumps and overburden soils salvaged from excavated areas have been stockpiled on site for future reclamation. The Washington Department of Natural Resources Permit No. 70-013024 for the WEA was approved on May 2, 2012. The permitted area encompasses a total of 183 acres, which includes the following: ■ 156 acres in the mining area (137 acres will be disturbed during the mining process, 19 acres of setbacks, buffers and wetlands will remain “as-is”). ■ 9 acres for the utility and maintenance road easement. ■ 18 acres for the Operations and Processing Facility. Monitoring Period:01/01/2016 - 03/31/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-1 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-1 5-F 1/29/16 No 7-F 2/12/16 No 13-M 3/21/16 No Total No <= 0 Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:01/01/2016 - 03/31/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-2 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-2 5-F 1/29/16 No 7-F 2/12/16 No 13-M 3/21/16 No Total No <= 0 Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:01/01/2016 - 03/31/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-3 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-3 5-F 1/29/16 No 7-F 2/12/16 No 13-M 3/21/16 No Total No <= 0 Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:01/01/2016 - 03/31/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-4 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-4 MP-4 5-F 1/29/16 7.44 No 7-F 2/12/16 6.97 No 13-M 3/21/16 7.03 No Total No <= 0 Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 4/22/2016 5:30:23 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:04/01/2016 - 06/30/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 5-Th 4/28/16 No 7-F 5/13/16 No 14-W 6/29/16 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:04/01/2016 - 06/30/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 5-Th 4/28/16 No 7-F 5/13/16 No 14-W 6/29/16 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:04/01/2016 - 06/30/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 5-Th 4/28/16 No 7-F 5/13/16 No 13-M 6/20/16 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:04/01/2016 - 06/30/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 5-Th 4/28/16 C No 7-F 5/13/16 C No 14-W 6/29/16 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 7/29/2016 10:29:56 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:07/01/2016 - 09/30/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 2-W 7/6/16 No 10-M 8/29/16 No 11-T 9/6/16 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:07/01/2016 - 09/30/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 2-W 7/6/16 No 10-M 8/29/16 No 11-T 9/6/16 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:07/01/2016 - 09/30/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 2-W 7/6/16 No 10-M 8/29/16 No 11-T 9/6/16 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:07/01/2016 - 09/30/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 2-W 7/6/16 C No 10-M 8/29/16 C No 11-T 9/6/16 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 10/18/2016 2:48:04 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:10/01/2016 - 12/31/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 3-F 10/14/16 No 7-M 11/7/16 No 14-Th 12/29/16 No Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:10/01/2016 - 12/31/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 3-F 10/14/16 No 7-M 11/7/16 No 14-Th 12/29/16 No Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:10/01/2016 - 12/31/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 3-F 10/14/16 No 7-M 11/7/16 No 14-Th 12/29/16 No Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:10/01/2016 - 12/31/2016 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 3-F 10/14/16 7.51 No 7-M 11/7/16 7.66 No 14-Th 12/29/16 7.67 No Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 1/26/2017 11:53:46 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 2014 Wahl Extraction Area Groundwater Monitoring Report.pdfMicrosoft Word - Wahl Extraction Area Groundwater Monitoring Report 2014.docx 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 January 26, 2015 Miles Sand & Gravel Company P.O. Box 130 Auburn, Washington 98071 Attention: Mike Schuh Subject: Letter Report 2014 Groundwater, Surface Water and Precipitation Monitoring Data Shine Facility – Wahl Extraction Area Jefferson County, Washington File No. 1355-035-00 Monitoring requirements at the site were set forth by Jefferson County Department of Community Development (DCD) as conditions of the Wahl Permit (MLA03-0037), dated July 18, 2005, prepared originally for Fred Hill Materials (FHM) and Ordinance 08-0706-04 (MLA10-00073), Amendment 09-1213-10 dated December 18, 2010. The purpose of this letter is to provide a summary of the water monitoring program implemented for the Wahl Extraction Area (WEA) as of the last data download event on January 16, 2015 and to compare the high groundwater table elevations with the proposed excavation elevations at the WEA. PREVIOUS AND CURRENT MONITORING The original monitoring, initiated in August 2005, was conducted by CR Hydrogeologic Consulting FHM. GeoEngineers, Inc. (GeoEngineers) assumed the monitoring duties in November 2009 when Miles Sand and Gravel Company (Miles) commenced leasing the operations at the WEA. The monitoring locations are shown on Figure 1. The following are elements of the current monitoring program: Groundwater ■ Groundwater level monitoring at the WEA began in August 2005 with the installation of an automated water-level sensor (consisting of a combined pressure transducer and datalogger) in MW-9, a monitoring well located in the southwest portion of the WEA. The automated sensor measures and records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The monitoring equipment is still functioning and has provided reliable data. Miles Sand & Gravel Company | January 26, 2014 Page 2 File No. 1355-035-00 ■ A water-level sensor was installed in the Shine Hub water supply well in April 2007. The sensor malfunctioned in June 2010 and was replaced in September 2010 with new equipment from the same manufacturer. The sensor malfunctioned again in April 2013 and was repaired and reinstalled in July 2013. With the exception of a few months in 2010 and in 2013, the monitoring equipment has provided reliable data. ■ In January 2010, additional monitoring wells (MW-5 and MW-8) equipped with sensors were added by Miles to estimate a groundwater surface profile beneath the WEA. The installed sensors are from the same manufacturer as those installed in MW-9 and the Shine Hub well. The current monitoring equipment provides reliable data. ■ In 2012, MW-5 was deepened to explore for a groundwater supply for the facility. The exploration was unsuccessful and MW-5 was decommissioned. Thus, the water level sensor from MW-5 was moved to MW-15 on February 15, 2012. MW-15 is located approximately 550 feet south of the proposed mining area and now provides a monitoring point for the southern portion of the WEA. Surface Water ■ Three surface water stations were established in September 2005 on Thorndyke Creek near the WEA. One of the stations (Station 3) is located on an unnamed tributary and two are located on Thorndyke Creek, with Station 2 upstream and Station 1 located downstream of the confluence with the unnamed tributary. The stream stage height at each station is recorded on an hourly basis using an automated sensor. The streamflow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ An additional surface water monitoring point (Station 4) is located on Thorndyke Creek approximately 1 mile upstream of its mouth. The stream stage height is recorded on an hourly basis using an automated sensor. The stream flow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. The sensor installed at Station 4 malfunctioned in April 2014 and was repaired and reinstalled in June 2014. ■ The automated equipment previously installed at the surface water stations was replaced at all four stations in 2011 and 2012 with more reliable sensors. Precipitation ■ A weather station was established on the roof of the office building at the current Shine Hub in September 2005. The data, collected on an hourly basis, includes precipitation, temperature and wind direction and speed. Between March 14 and October 17, 2012, the weather station experienced a loss of data. Miles has reportedly implemented periodic data downloads to minimize potential future loss of data. As of October 17, 2012, the weather station is functional and once again is providing reliable data. MONITORING DATA SUMMARY The latest set of monitoring data was collected at the WEA on January 16, 2015. GeoEngineers has developed plots of the monitoring data described below. Mining has commenced in the WEA and several years of background groundwater, surface water and precipitation data have now been acquired. Miles Sand & Gravel Company | January 26, 2014 Page 3 File No. 1355-035-00 Groundwater Data The elevations of the groundwater monitoring points (rims of the well casings) have been surveyed relative to the National Geodetic Vertical Datum (NGVD) 1929 datum. The water levels measured in each monitoring well have been converted to groundwater elevations. Figure 2 shows a plot of groundwater elevations from the four monitoring wells and the Shine Hub water supply well. The water supply well is located near the office buildings at the Shine Facility (Figure 1). Monitoring wells MW-5, MW-8 and MW-9 are located within the WEA; monitoring wells MW-15 is located approximately 550 feet south of the WEA. Shine Hub Water Supply Well The hourly data from the Shine Hub water supply well are shown on Figure 2 as points because the well pump cycles on and off several times a day. The lowest water level elevations in the Shine HUB water supply well represent pumping water levels and the highest represent fully or nearly recovered water levels. The data in-between represent water levels that are either recovering or are being drawn down at various stages of the pumping cycle. The highest levels show a pattern similar to the other monitoring wells described below that are located over a mile west of the Shine Hub well. Monitoring Wells MW-5, MW-8, MW-9 and MW-15 The dataset with the longest period of record is for monitoring well MW-9, beginning in August 11, 2005. The groundwater elevations in all the wells show similar seasonal fluctuations of rising levels in the winter wet months and declining levels between spring and fall. During the winter of 2008-09, there was below-normal precipitation that was indicated by a decline in water levels from between early 2008 and late 2009. The highest recorded groundwater elevation of 282.50 feet (NGVD 29) for MW-5 was recorded in 2011. The highest recorded groundwater elevations for other observation wells were all recorded in 2013. These groundwater elevations were 278.38, 279.48 and 254.71 feet (NGVD 29) for MW-8, MW-9, and MW-15, respectively. Surface Water Data Figure 3 shows a plot of the surface water data for Station 1, located on Thorndyke Creek southwest of the southernmost extent of the WEA, as a typical example of the surface water datasets. An elevation of 233 feet NGVD is estimated at Station 1 based on the U.S. Geologic Survey topographic map. Figure 3 shows the stage heights as recorded at a 30-minute interval using dataloggers. The stage height dataset had three relatively short periods in 2010 and 2011 when the data was lost due to faulty monitoring sensors. The equipment was replaced in early 2012 with more reliable sensors and the stage heights were recorded at an hourly interval. Figure 3 also shows the streamflow rates calculated from flow velocities that were measured by wading the stream; these are plotted on a logarithmic vertical scale (right-hand axis). The highest recorded flow at Station 1 was 56.27 cubic feet per second on January 4, 2008. Precipitation Data Figure 4 shows a plot of the daily precipitation at the weather station located on the roof of the Shine Hub office. The highest recorded daily precipitation event was 3.11 inches on December 3, 2007. Miles Sand & Gravel Company | January 26, 2014 Page 4 File No. 1355-035-00 GROUNDWATER ELEVATIONS VERSUS PROPOSED EXCAVATION FLOOR The proposed excavation elevations are shown on the attached plan titled “WDNR Permit No. 70-013024 Final Reclamation Map” as prepared by Team 4 Engineering. The plan shows that the excavation will stay 10 feet above the high groundwater table, as a currently required condition, in the central and north portions of the WEA. Miles proposes to excavate to Elevation 275 feet in the southernmost extent of the WEA. Prior to 2012 there was a lack of groundwater monitoring data points in this area. Monitoring of MW-15, located approximately 550 feet south of the southern WEA mining disturbance boundary (Figure 1), indicates that the highest water level recorded at MW-15 was Elevation 254.71 feet. Based on a uniform gradient between MW-9 and MW-15, the high groundwater elevation would be approximately Elevation 261 feet at the southern mining disturbance boundary as shown on the Reclamation Map (Attachment 1). Thus, the proposed excavation elevation of Elevation 275 feet will be greater than 10 feet above the highest groundwater table based on available data. CONCLUSIONS Monitoring data for groundwater, surface water and precipitation at the Wahl Extraction Area are being collected by GeoEngineers on an ongoing basis to develop an extensive background data set, as required under permit conditions and local ordinances. Data have been collected since 2005, and additional groundwater monitoring locations installed in 2009 have allowed the estimation of a groundwater elevation profile beneath the planned mining area. Based on the groundwater data collected to date, the gravel mine excavations proposed by Miles at the Wahl Extraction Area are 10 feet or greater above the highest projected groundwater surface elevations. & ( E D E D E D E D @ A @ A @ A @ A @ A Shine Hub Weather Station MW-15 MW-8 MW-5 MW-9 Shine Hub Water Supply Well Wahl Lake Rd Thorndyke Rd U V 104 Thorndyke Rd S Point Rd Peabody Way Thorndyke Rd µ Vicinity Map Figure 1 Shine Facility - Wahl Extraction Area Miles Sand & Gravel Company Shine, Washington ! ^ Olympia § ¨ ¦ 90 § ¨ ¦ 5 § ¨ ¦ 405 £ ¤ 101 Olympic NP Washington 3,000 3,000 0 Feet Data Sources: ESRI Data & Maps, Street Maps 2005 Notes: 1. The locations of all features shown are approximate. 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 3. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without permission. Transverse Mercator, State Plane South, North American Datum 1983 North arrow oriented to grid north Office: TACOPath: P:\1\1355035\GIS\135503500_F1.mxdMap Revised: 20 March 2012 syi E D E D E D Station 1 Station 2 Station 3 200 200 0 Feet Station 1 Station 3Station 2 Station 4 Legend @ A Monitoring Well E D Stream Gage & ( Shine Hub Weather Station Wahl Extraction Area MW-5 Station 1 Thomdyke Creek Creek Groundwater Data Shine Facility-Wahl Extraction Area Jefferson County, Washington Figure 2 SP:\1\1355035\00\finals\Shine Facility –2014 Annual Report_Figures2 through 4.pptx JWP 01/21/2015 Surface Water Data Shine Facility-Wahl Extraction Area Jefferson County, Washington Figure 3 SP:\1\1355035\00\finals\Shine Facility –2014 Annual Report_Figures2 through 4.pptx JWP 01/21/2015 1/1/041/1/051/1/061/1/071/1/081/1/091/1/101/1/111/1/121/ 1/131/1/14 Date 0 1 2 3 4 0.1 1 10 100 1000 Station1RelativeStageHeights WadedStreamFlowMeasurements 1/1/051/1/061/1/071/1/081/1/091/1/101/1/111/1/121/1/131/1/141/1/15 Date 0 1 2 3 4 0.1 1 10 100 1000 Station4RelativeStageHeights WadedStreamFlowMeasurements SensorReplaced 5/6/11 1/1/041/1/051/1/061/1/071/1/081/1/091/1/101/1/111/1/121/1/131/1/141/1/15 Date 0 1 2 3 4 0.1 1 10 100 1000 Station2RelativeStageHeights WadedStreamFlowMeasurements RelocatedStation2 approximately300feetupstream on2/15/2011 FaultyReadings SensorReplaced 2/3/12 1/1/041/1/051/1/061/1/0 71/1/081/1/091/1/101/1/111/1/121/1/131/1/141/1/15 Date -1 0 1 2 3 4 0.1 1 10 100 1000 Station3RelativeStageHeights WadedStreamFlowMeasurements StreamBedEroded BelowStaffGageDatum ReplacedSensor 5/6/11 Precipitation Data Shine HubWeather Station Shine Facility-Wahl Extraction Area Jefferson County, Washington Figure 4 SP:\1\1355035\00\finals\Shine Facility –2014 Annual Report_Figures2 through 4.pptx JWP 01/21/2015 1/1/041/1/051/1/061/1/071/1/081/1/091/1/101/1/111/1/121/1/131/1/141/1/15 Date 0 1 2 3 4 5 DailyPrecipitation(inches) ATTACHMENT 1 Wahl Reclamation Map 2020 Miles Wahl Quarterly Inspection.pdfMicrosoft Word - 2020 Miles Wahl Quarterly Inspection 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 May 6, 2021 Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, Washington 98368 Attention: David W. Johnson Subject: 2020 On-Site Inspection of Miles Sand & Gravel Company, Shine Facility Wahl Extraction Area, WDNR Permit No. 70-013024 Jefferson County, Washington File No. 1355-035-06 This letter presents the results of the quarterly on-site inspection of the Shine Facility operated by Miles Sand & Gravel Company (Miles). Conditions 7 and 9 of Jefferson County Ordinance 08-706-04, amended by Jefferson County Ordinance 09-1213-10, require the submittal of a quarterly inspection report regarding mining operations located within a designated Aquifer Recharge Area. The intent is for this letter to satisfy the requirements of Conditions 7 and 9 and to present the results of the quarterly inspections in 2020. GeoEngineers, Inc. (GeoEngineers) conducted a review of workings for 2020 at the Wahl Extraction Area (WEA) within the Shine Facility on a quarterly basis. The last site visit was on December 15, 2020 when Eric Knoedler, Staff Hydrogeologist with GeoEngineers, and Ryan Ransavage, Earth Resources Manager for Miles, conducted a tour of the operations. Mr. Knoedler and Mr. Ransavage toured the boundaries of the permitted excavation area, which were marked with polyvinyl chloride (PVC) posts that extended 6 to 10 feet above ground. These posts were readily observed from a distance. The excavations, plant operations and mining activities were all occurring within the marked boundary. Approximately 96 acres have been disturbed within the WEA since the extraction process commenced in April 2013. Approximately 40 acres have been reclaimed in accordance with permit conditions. The Washington Department of Natural Resources (DNR) Permit No. 70-013024 for the WEA was approved on May 2, 2012. The permitted area encompasses a total of 183 acres, which includes the following: ■ 156 acres in the mining area (137 acres will be disturbed during the mining process, 19 acres of setbacks, buffers and wetlands will remain “as-is”). ■ 9 acres for the utility and maintenance road easement. ■ 18 acres for the Operations and Processing Facility. Jefferson County Department of Community Development | May 6, 2021 Page 2 File No. 1355-035-06 SUMMARY The following is a summary of observations made during the quarterly site visits: ■ Boundaries of the permitted areas were clearly marked. ■ No mining activities were occurring outside of the permitted areas. ■ The stormwater pond, the location of a water quality monitoring point G002-SG02 (previously referred to as MP 1), was absent of sheen. Copies of the four quarterly Discharge Monitoring Reports (DMRs) that Miles submitted to the Department of Ecology are attached. The DMRs show the results at four monitoring points. The monitoring points: G004-PG02, G003-PG01, G001-SG01 and G002-SG02 (previously referred to as MP 1, MP 2, MP 3 and MP 4, respectively) are shown on the attached Shine Facility Map. ■ Approximately 40 acres of the 96 acres mined since April 2013 were reclaimed through 2020. RECOMMENDATIONS GeoEngineers has been monitoring the WEA since operations began. Based on the previous observations and the level of mining activity at the site, we recommended that the discharge monitoring should continue on a quarterly basis and the reporting should be done on an annual basis. Annual reporting of quarterly monitoring results was approved via email by David W. Johnson of Jefferson County on March 3, 2014. Please contact us if you have any questions concerning this report. Sincerely, GeoEngineers, Inc. Bridget A. August, LG, LHG Senior Hydrogeologist Galan W. McInelly, LG, LHG Principal BAA:GWM:leh Attachments: Quarterly Discharge Monitoring Reports for 2020 Shine Facility Map cc: Ryan Ransavage Miles Sand & Gravel Company Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. May 6, 2021 Monitoring Period:01/01/2020 - 03/31/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G001 G001 3-F 1/17/20 C No 8-T 2/18/20 7.5 No 12-W 3/18/20 C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:01/01/2020 - 03/31/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G002 3-F 1/17/20 No 8-T 2/18/20 No 12-W 3/18/20 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:01/01/2020 - 03/31/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G003 3-F 1/17/20 No 8-T 2/18/20 No 12-W 3/18/20 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:01/01/2020 - 03/31/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G004 G004 3-F 1/17/20 C No 8-T 2/18/20 C No 12-W 3/18/20 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Ryan Ransavage Signature Date 4/14/2020 8:21:24 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:04/01/2020 - 06/30/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G005 G001 G001 2-Th 4/9/20 No C No 7-Th 5/14/20 No C No 12-T 6/16/20 No C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:04/01/2020 - 06/30/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G002 2-Th 4/9/20 No 7-Th 5/14/20 No 12-T 6/16/20 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:04/01/2020 - 06/30/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G003 2-Th 4/9/20 No 7-Th 5/14/20 No 12-T 6/16/20 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:04/01/2020 - 06/30/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G004 G004 2-Th 4/9/20 C No 7-Th 5/14/20 C No 12-T 6/16/20 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Ryan Ransavage Signature Date 7/28/2020 12:15:47 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:07/01/2020 - 09/30/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G005 G001 G001 3-Th 7/16/20 No C No 7-W 8/12/20 No C No 11-Th 9/10/20 No C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:07/01/2020 - 09/30/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G002 3-Th 7/16/20 No 7-W 8/12/20 No 11-Th 9/10/20 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:07/01/2020 - 09/30/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G003 3-Th 7/16/20 No 7-W 8/12/20 No 11-Th 9/10/20 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:07/01/2020 - 09/30/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G004 G004 3-Th 7/16/20 C No 7-W 8/12/20 C No 11-Th 9/10/20 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Ryan Ransavage Signature Date 10/28/2020 12:27:52 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:10/01/2020 - 12/31/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G005 G001 G001 2-T 10/6/20 No C No 8-M 11/16/20 No C No 12-M 12/14/20 No C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:10/01/2020 - 12/31/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G002 2-T 10/6/20 No 8-M 11/16/20 No 12-M 12/14/20 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:10/01/2020 - 12/31/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G003 2-T 10/6/20 No 8-M 11/16/20 No 12-M 12/14/20 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:10/01/2020 - 12/31/2020 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground Miles Sand & Gravel Shine Pit Monitoring PointWeek G004 G004 2-T 10/6/20 C No 8-M 11/16/20 C No 12-M 12/14/20 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Ryan Ransavage Signature Date 1/28/2021 7:58:09 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 ! ! # # # # Thorndyke Creek G002-SG02 G001-SG01 G004-PG02G 003-PG01 1,800 Ft Shine Facility ° Legend Permit Boundary Waterbodies Drainage Area* g Catch Basins # Processwater to Ground # Processwater to Surface # Stormwater to Ground # Stormwater to Surface ! Bulk Material Unloading ! Fuel ! Outdoor Material Storage ! Outdoor Processing ! Shop ! Underground Storage Tank/Fuel *Area slopes to monitoring point unless noted otherwise. Flow 2017 Miles Wahl Quarterly Inspection.pdfMicrosoft Word - 2017 Miles Wahl Quarterly Inspection.docx 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 June 5, 2018 Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, Washington 98368 Attention: David W. Johnson Subject: 2017 On-Site Inspection of Miles Sand & Gravel Company, Shine Facility Wahl Extraction Area, WDNR Permit No. 70-013024 Jefferson County, Washington File No. 1355-035-04 This letter presents the results of the quarterly on-site inspection of the Shine Facility operated by Miles Sand & Gravel Company (Miles). Conditions 7 and 9 of Jefferson County Ordinance 08-706-04, amended by Jefferson County Ordinance 09-1213-10, require the submittal of a quarterly inspection report regarding mining operations located within a designated Aquifer Recharge Area. The intent is for this letter to satisfy the requirements of Conditions 7 and 9 and to present the results of the quarterly inspections in 2017. GeoEngineers, Inc. (GeoEngineers) conducted a review of workings for 2017 at the Wahl Extraction Area (WEA) within the Shine Facility on a quarterly basis. The last site visit was on October 27, 2017 when Jacob Letts, Senior Hydrogeologist with GeoEngineers, and Ryan Ransavage, Environmental Specialist for Miles conducted a tour of the operations. Mr. Ransavage showed the boundaries of the permitted excavation area. The boundaries of the permitted area are marked with polyvinyl chloride (PVC) posts that extend 6 to 10 feet above ground. These posts were readily observed from a distance. The excavations, plant operations and mining activities were all occurring within the marked boundary. No reclamation has occurred within the WEA since the extraction process had commenced in April 2013. However, the mined area is at or near the permitted 40 acres, and reclamation is planned to begin in 2018. Stumps and overburden soils salvaged from excavated areas have been stockpiled on site for future reclamation. The Washington Department of Natural Resources (DNR) Permit No. 70-013024 for the WEA was approved on May 2, 2012. The permitted area encompasses a total of 183 acres, which includes the following: ■ 156 acres in the mining area (137 acres will be disturbed during the mining process, 19 acres of setbacks, buffers and wetlands will remain “as-is”). ■ 9 acres for the utility and maintenance road easement. ■ 18 acres for the Operations and Processing Facility. Monitoring Period:01/01/2017 - 03/31/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 2-F 1/13/17 No 5-W 2/1/17 No 13-Th 3/30/17 No Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:01/01/2017 - 03/31/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 2-F 1/13/17 No 5-W 2/1/17 No 13-Th 3/30/17 No Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:01/01/2017 - 03/31/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 2-F 1/13/17 No 5-W 2/1/17 No 13-Th 3/30/17 No Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:01/01/2017 - 03/31/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 2-F 1/13/17 7.97 No 5-W 2/1/17 7.81 No 13-Th 3/30/17 7.84 No Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 4/24/2017 1:00:11 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:04/01/2017 - 06/30/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 4-F 4/21/17 No 9-W 5/24/17 No 11-M 6/5/17 No Reporting Codes Used: C - No Discharge Version: 2 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:04/01/2017 - 06/30/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 4-F 4/21/17 No 9-W 5/24/17 No 11-M 6/5/17 No Reporting Codes Used: C - No Discharge Version: 2 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:04/01/2017 - 06/30/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 4-F 4/21/17 No 9-W 5/24/17 No 11-M 6/5/17 No Reporting Codes Used: C - No Discharge Version: 2 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:04/01/2017 - 06/30/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 4-F 4/21/17 C No 9-W 5/24/17 C No 11-M 6/5/17 C No Reporting Codes Used: C - No Discharge Version: 2 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 7/24/2017 4:50:06 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:07/01/2017 - 09/30/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 G001 4-W 7/19/17 C No 9-T 8/22/17 C No 14-T 9/26/17 C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:07/01/2017 - 09/30/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 4-W 7/19/17 No 9-T 8/22/17 No 14-T 9/26/17 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:07/01/2017 - 09/30/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 4-W 7/19/17 No 9-T 8/22/17 No 14-T 9/26/17 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:07/01/2017 - 09/30/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 4-W 7/19/17 C No 9-T 8/22/17 C No 14-T 9/26/17 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 10/30/2017 1:20:40 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:10/01/2017 - 12/31/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 G001 4-Th 10/26/17 C No 8-Sa 11/25/17 C No 10-T 12/5/17 C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:10/01/2017 - 12/31/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 4-Th 10/26/17 No 8-Sa 11/25/17 No 10-T 12/5/17 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:10/01/2017 - 12/31/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 4-Th 10/26/17 No 8-Sa 11/25/17 No 10-T 12/5/17 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:10/01/2017 - 12/31/2017 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 4-Th 10/26/17 C No 8-Sa 11/25/17 C No 10-T 12/5/17 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 1/29/2018 8:10:55 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 2018 Wahl Extraction Area Groundwater Monitoring Report.pdfMicrosoft Word - 2018 Wahl Extraction Area Groundwater Monitoring Report 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 February 12, 2021 Miles Sand & Gravel Company 400 Valley Avenue NE Puyallup, Washington 98372 Attention: Ryan Ransavage Subject: Letter Report 2018 Groundwater, Surface Water and Precipitation Monitoring Data Shine Facility – Wahl Extraction Area Jefferson County, Washington File No. 1355-035-05 Monitoring requirements at the Shine Facility were set forth by Jefferson County Department of Community Development (DCD) as conditions of the Wahl Permit (MLA03-0037), dated July 18, 2005, prepared originally for Fred Hill Materials (FHM) and Ordinance 08-0706-04 (MLA10-00073), Amendment 09-1213-10 dated December 18, 2010. The purpose of this letter is to provide a summary of the water monitoring program implemented for the Wahl Extraction Area (WEA) through December 31, 2018 and to compare the high groundwater table elevations with the proposed excavation elevations at the WEA. PREVIOUS AND CURRENT MONITORING The original monitoring, initiated in August 2005, was conducted by CR Hydrogeologic Consulting FHM. GeoEngineers, Inc. (GeoEngineers) assumed the monitoring duties in November 2009 when Miles Sand & Gravel Company (Miles) commenced leasing the operations at the WEA. The current monitoring program includes groundwater, surface water, and precipitation data acquisition. The monitoring locations are shown on Figure 1. Groundwater and surface water data are presented on Figures 2 and 3, respectively. Precipitation data are shown on Figure 3. The following are elements of the current monitoring program: Groundwater ■ Groundwater level monitoring at the WEA began in August 2005 with the installation of an automated water-level sensor (consisting of a combined pressure transducer and datalogger) in monitoring well MW-9, a monitoring well located in the southwest portion of the WEA (Figure 1). The transducer measures and records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The transducer provided reliable data from August 2005 through November 2016. Miles Sand & Gravel Company | February 12, 2021 Page 2 File No. 1355-035-05 ■ By late 2016, excavation had progressed to the area surrounding monitoring well MW-9 and the wellhead was nearly inaccessible. The transducer in monitoring well MW-9 was removed on November 7, 2016. Monitoring well MW-9 was not accessible during 2017 and 2018. The casing for monitoring well MW-9 will be modified, and the transducer will be reinstalled after excavation and reclamation activities are complete in the area surrounding monitoring well MW-9. ■ A transducer was installed in the Shine Hub water supply well (Figure 1) in April 2007. The transducer malfunctioned in June 2010 and was replaced in September 2010 with new equipment from the same manufacturer. The transducer malfunctioned again in April 2013 and was repaired and reinstalled in July 2013. The transducer also temporarily stopped recording between March and May 2018. With the exception of a few months in 2010, 2013 and in 2018, the monitoring equipment has provided reliable data. ■ In January 2010, Miles installed additional transducers in monitoring wells MW-5 and MW-8 (Figure 1) to estimate a groundwater surface profile beneath the WEA. The installed transducers were from the same manufacturer as those installed in monitoring well MW-9 and the Shine Hub water supply well. The monitoring equipment installed in monitoring well MW-5 provided reliable data through April 2012. The monitoring equipment installed in monitoring well MW-8 provided reliable data through mid-March 2018. ■ In 2012, monitoring well MW-5 was deepened to explore for a groundwater supply for the facility. The exploration was unsuccessful, and MW-5 was decommissioned. Thus, the transducer from MW-5 was moved to monitoring well MW-15 (Figure 1) on May 2, 2012. Monitoring well MW-15 is located approximately 550 feet south of the proposed mining area and provides a monitoring point for the southern portion of the WEA. ■ The vented transducer in MW-8 was replaced in October 2015 with a new non-vented transducer (INW PT2X 50-psi). ■ By early 2018, excavation had progressed to the area surrounding monitoring well MW-8 and the wellhead was nearly inaccessible. The transducer in monitoring well MW-8 was removed on March 16, 2018. Monitoring well MW-8 was not accessible throughout the remainder of 2018. The casing for monitoring well MW-8 will be modified, and the transducer will be reinstalled after excavation and reclamation activities are complete in the area surrounding monitoring well MW-8. ■ The transducer removed from monitoring well MW-8 was installed in monitoring well MW-16, located approximately 1,430 feet northeast of monitoring well MW-8 (Figure 1). The transducer malfunctioned and was deemed inoperable; thus, a new non-vented transducer from the same manufacturer (INW LevelScout 30-psi) was installed on September 21, 2018. No survey elevation is available for the wellhead at monitoring well MW-16; thus, groundwater elevations have not been established at this monitoring location. We will continue to measure water levels at MW-16. Once the wellhead is surveyed, measured groundwater levels will be converted to elevations and plotted on Figure 2. Surface Water ■ Three surface water stations (Stations 1 through 3) were established in September 2005 on Thorndyke Creek near the WEA (Figure 1). One of the stations (Station 3) is located on an unnamed tributary and two are located on Thorndyke Creek, with Station 2 upstream and Station 1 located downstream of the confluence with the unnamed tributary. The stream stage height at each station is recorded on an hourly basis using an automated water-level sensor. The streamflow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. Miles Sand & Gravel Company | February 12, 2021 Page 3 File No. 1355-035-05 ■ An additional surface water monitoring point (Station 4) is located on Thorndyke Creek approximately 1 mile upstream of its mouth (Figure 1). The stream stage height is recorded on an hourly basis using an automated water-level sensor. Stream flow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ The automated equipment previously installed at the surface water stations was replaced at all four stations in 2011 and 2012 with more reliable sensors. The sensor installed at Station 4 malfunctioned in April 2014 and was repaired and reinstalled in June 2014. ■ The stream channel at Station 1 experienced significant channel migration beginning in early 2016. A large precipitation event in January 2016 moved the channel westward and away from the staff gage, leaving the staff gage out of the channel. The stream occupied this relocated channel through 2017 and 2018; thus, staff gage readings at Station 1 are not representative of actual surface water levels starting in January 2016. ■ In spring 2017, the stream channel at Station 3 bifurcated, and the staff gage was positioned at the edge of a center bar of the stream. Throughout most of 2018, the staff gage was several feet west of the wetted channel; thus, staff gage readings at Station 3 are not representative of actual surface water levels starting in spring 2017. ■ The stream channel and staff gage at Station 2 were affected by a small log jam sometime between the winter and spring 2017 monitoring events. The logs damaged the staff gage tape and caused a slight tilt to the staff gage. The logs were removed during the spring monitoring event to prevent further damage to the staff gage and the gage tape was replaced. ■ The stream channel at Station 4 bifurcated in early 2017, resulting in the formation of a gravel bar in the middle of the stream and deepening of the channel at the staff gage location. The condition of the staff gage was checked during each of the 2018 monitoring events. No modifications to the gage have been needed. ■ In January 2017, communication could not be established with the transducer installed at Station 3. The transducer was removed, sent in for repair, and reinstalled in June 2017. ■ In May 2017, the transducer at Station 2 malfunctioned and was removed, sent in for repair, and reinstalled in June 2017 but was subsequently moved to Station 1 by Miles and the Station 2 transducer was replaced with a new transducer in July 2017. ■ In October 2017, the transducer at Station 1 malfunctioned and was removed and sent in for repair. It was reinstalled in November 2017. ■ New staff gage tapes were installed at Station 1, Station 2, and Station 4 in July 2017. ■ Miles installed new non-vented transducers (INW LevelScout 30-psi) at all four stations on September 21, 2018. Precipitation ■ A weather station was established on the roof of the office building at the current Shine Hub in September 2005. The data, collected on an hourly basis, includes precipitation, temperature, and wind direction and speed. Between March 14 and October 17, 2012, the weather station experienced a loss of data. Periodic data losses from September 1, 2013 through December 31, 2016 have occurred as a result of damage caused by power outages at the site. Therefore, the data for 2013 through 2016 is Miles Sand & Gravel Company | February 12, 2021 Page 4 File No. 1355-035-05 incomplete. A comparable dataset was acquired for January 1, 2012 through December 31, 2018 from the Kitsap Public Utility District No. 1’s (KPUD) rain gage at Edgewater, located on the Kitsap Peninsula approximately 5 miles southeast of the WEA. MONITORING DATA SUMMARY GeoEngineers has developed plots of the monitoring data described below. Mining has commenced in the WEA and several years of background groundwater, surface water and precipitation data have now been acquired. Groundwater Data The elevations of groundwater monitoring points (rims of the well casings) MW-5, MW-8, MW-9, MW-15, and the Shine Hub water supply well have been surveyed relative to the National Geodetic Vertical Datum (NGVD) 1929 datum. The water levels measured in each monitoring well have been converted to groundwater elevations using surveyed monitoring point elevations. The elevation of groundwater monitoring point MW-16 has not been surveyed; thus, groundwater elevations have not been established at this location. A plot of groundwater elevations from monitoring wells MW-5, MW-8, MW-9, MW-15, and the Shine Hub water supply well is presented on Figure 2. The water supply well is located near the office buildings at the Shine Facility (Figure 1). Monitoring wells MW-5, MW-8, MW-9, and MW-16 are located within the WEA; monitoring well MW-15 is located approximately 550 feet south of the WEA (Figure 1). Shine Hub Water Supply Well The hourly data from the Shine Hub water supply well are shown on Figure 2 as points because the well pump cycles on and off several times a day. The lowest water level elevations in the Shine Hub water supply well represent pumping water levels and the highest represent fully or nearly recovered (i.e., static) water levels. The data in-between represent water levels that are either recovering or are being drawn down at various stages of the pumping cycle. Seasonal water level fluctuations in the Shine Hub water supply well are similar to the other site monitoring wells (described below), located over a mile west of the Shine Hub well, and are attributed to seasonal fluctuations in precipitation. Groundwater elevations observed at the Shine Hub water supply well showed relatively sharp increases in early 2016 and early 2017 (Figure 2). Groundwater elevations remained elevated through 2018 relative to pre-2016 groundwater elevations. A similar pattern was also observed in monitoring wells MW-8 and MW-15. This overall rise in groundwater elevations is likely the result of recharge from increased precipitation between 2016 and 2017 (Figure 4). The effects of increased annual precipitation and large individual precipitation events are also shown in the surface water monitoring records (Figure 3). Groundwater elevations at the Shine Hub water supply well appear to have peaked in early 2018 and may now be returning to pre-2016 water level elevations, which is likely the result of decreased precipitation in 2018 compared to total rainfall in 2016 and 2017. Miles Sand & Gravel Company | February 12, 2021 Page 5 File No. 1355-035-05 Monitoring Wells MW-8, MW-9, MW-15, and MW-16 The groundwater elevations in all the monitoring wells show similar seasonal fluctuations of rising levels in the wet winter months and declining levels between spring and fall. The highest recorded groundwater elevation for monitoring well MW-8 was 282.2 feet (NGVD 29) recorded in May 2017. Monitoring at well MW-8 was discontinued in March 2018 because excavation surrounding the well rendered the wellhead inaccessible. The dataset with the longest period of record is for monitoring well MW-9, beginning in August 2005 through November 2016. The highest recorded groundwater elevation for monitoring well MW-9 was 281.5 recorded in April 2016. The highest recorded groundwater elevation for monitoring well MW-15 was 256.8 feet recorded in May 2017. No survey elevation is available for the wellhead at monitoring well MW-16; thus, groundwater elevations have not been established at this monitoring location. We will continue to measure water levels at MW-16. Once the wellhead is surveyed, measured groundwater levels will be converted to elevations and plotted on Figure 2. As discussed above, the observed trend of rising groundwater elevations starting in 2016 at MW-8 and MW-15 is likely attributed to increased precipitation during the winters of 2016 and 2017. Groundwater elevations at MW-15 appear to have peaked in early 2017 and may now be returning to pre-2016 water level elevations, which is likely the result of decreased precipitation in 2018 compared to total rainfall in 2016 and 2017. Surface Water Data Figure 3 shows a plot of the surface water data for Stations 1 through 4, located on Thorndyke Creek and one of its tributaries. Figure 3 shows the stage heights as recorded on a 30-minute interval using dataloggers. The stage height dataset has had relatively short periods when the data was lost due to faulty monitoring sensors. In each case, the equipment was repaired or replaced. Figure 3 also shows the streamflow rates calculated from flow velocities that were measured by wading the stream; these rates are plotted on a logarithmic vertical scale (right-hand axis). Station 1 The highest measured flow at Station 1, located near the WEA (Figure 1), in 2018 was 13.2 cubic feet per second (cfs) during the March monitoring event and the lowest measured flow was 2.2 cfs during the August monitoring event. The stream channel at Station 1 experienced significant channel migration beginning in early 2016. Figure 3 shows a drop in recorded water levels following a large precipitation event in January 2016, which moved the channel westward and away from the staff gage, leaving the staff gage out of the channel. The stream occupied this relocated channel through 2017 and 2018; thus, staff gage readings at Station 1 (Figure 3) are not representative of actual surface water levels starting in January 2016. Station 2 The highest measured flow at Station 2 (Figure 1) in 2018 was 6.0 cfs during the March monitoring event and the lowest measured flow was 0.10 cfs during the October monitoring event. The stream channel position at Station 2 has meandered somewhat since at least 2010. As shown on Figure 3, measured surface water levels have dropped below the staff gage datum at times between 2010 and 2018 when the staff gage was near the bank or out of the channel. Station 3 The highest measured flow at Station 3 (Figure 1) in 2018 was 3.3 cfs during the March and April monitoring events and the lowest measured flow was 0.31 cfs during the October monitoring event. The stream Miles Sand & Gravel Company | February 12, 2021 Page 6 File No. 1355-035-05 channel at Station 3 migrated westward beginning in late 2016. In spring 2017, the stream channel bifurcated, and the staff gage was positioned at the edge of a center bar of the stream. Throughout most of 2018, the staff gage was several feet west of the wetted channel; thus, staff gage readings at Station 3 (Figure 3) are not representative of actual surface water levels starting in spring 2017. Station 4 The highest measured flow at Station 4 (Figure 1) in 2018 was 25.4 cfs during the March monitoring event and the lowest measured flow was 2.4 cfs during the October monitoring event. The stream channel at Station 4 bifurcated in early 2017 resulting in the formation of a gravel bar in the center of the stream. Flow diverted around the gravel bar appears to be incising the channel at the location of the Station 4 staff gage. Significant channel migration was observed upstream of Station 4 that may have resulted from multiple fallen trees impacting stream flow. Based on observations made during monitoring events conducted in 2017 and 2018, the channel at this location appears to be migrating westward. Precipitation Data Figure 4 shows a plot of the daily precipitation recorded at the weather station located on the roof of the Shine Hub office (2005 through 2016) and the KPUD’s Edgewater station (2009 through 2020). As stated above, it appears from the downloaded data that the Shine Hub weather station has had periods of malfunction and data loss since 2012. The weather station has not been collecting any precipitation data since early 2017. The Shine weather station data for 2012 through 2018 (Figure 4) is supplemented by data from the KPUD Edgewater Station rain gage until the Shine Hub weather station can be repaired. Comparing days when both stations recorded data, it appears that there has been significantly more rainfall at the Edgewater gage than recorded at the Shine weather station. The highest recorded daily precipitation event was 3.71 inches on January 21, 2016. The highest recorded daily precipitation event for 2018 was 1.77 inches on November 26, 2018. GROUNDWATER ELEVATIONS VERSUS PROPOSED EXCAVATION FLOOR The proposed excavation elevations are shown on the attached plan titled “WDNR Permit No. 70-013024 Final Reclamation Map” as prepared by Team 4 Engineering. The plan shows that the excavation will stay 10 feet above the high groundwater table, as a currently required condition, in the central and north portions of the WEA. Miles proposes to excavate to Elevation 275 feet in the southernmost extent of the WEA. Prior to 2012, there was a lack of groundwater monitoring data points in this area. Monitoring of MW-8, located within the WEA, and MW-15, located approximately 550 feet south of the southern WEA mining disturbance boundary (Figure 1), indicates that the highest water levels recorded at MW-8 and MW-15 were Elevation 282.2 feet and 256.8 feet, respectively, in May 2017. The highest groundwater elevation recorded at MW-15 in 2018 was Elevation 256.5 in May 2018, which is approximately 0.3 feet lower than the peak groundwater elevation recorded at the well. Based on a uniform gradient between MW-8 and MW-15, the highest groundwater elevation would be approximately Elevation 262 feet at the southern mining disturbance boundary (Attachment 1) based on historical peak groundwater elevations. Thus, the proposed excavation elevation of Elevation 275 feet will be greater than 10 feet above the highest groundwater table based on available data. Miles Sand & Gravel Company | February 12, 2021 Page 7 File No. 1355-035-05 CONCLUSIONS Monitoring data for groundwater, surface water, and precipitation at the WEA are being collected by GeoEngineers on an ongoing basis to develop an extensive background data set, as required under permit conditions and local ordinances. Data have been collected since 2005, and additional groundwater monitoring locations installed in 2009 have allowed the estimation of a historical groundwater elevation profile beneath the planned mining area. Based on the groundwater data collected to date and historical groundwater elevation trends, the gravel mine excavations proposed by Miles at the WEA will be 10 feet or greater above the highest projected groundwater surface elevations. RECOMMENDATIONS Based on the monitoring conducted in 2018, we have the following recommendations: ■ We recommend surveying the elevation of the wellhead at monitoring well MW-16 so groundwater levels can be translated to groundwater elevations. ■ We recommend repairing or replacing the on-site Shine weather station as soon as possible so that it records accurate precipitation data. ■ We recommend that the stream channels be observed to evaluate whether the surface water gage stations need to be repositioned or deepened to monitor stream gage heights effectively. Please contact us if you have any questions about the water monitoring program. Sincerely, GeoEngineers, Inc. Eric N. Knoedler, LG Hydrogeologist Bridget A. August, LG, LHG Galan W. McInelly, LG, LHG Senior Hydrogeologist Principal ENK:BAA:GWM:leh Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. Attachments: Figure 1. Vicinity Map Figure 2. Groundwater Data Figure 3. Surface Water Data Figure 4. Precipitation Data Attachment 1. Wahl Reclamation Map Thorndyke Rd Peabody Way S Point Rd Thorndyke Rd 104 Wahl Lake Rd Thorndyke Rd Groves Way Dickey St Shine Hub WaterS upply Well MW-9 MW-5 MW-8 MW-15 MW-16 Shine Hub Weather Station Vicinity Map Figure 1 Shine Facility - Wahl Extraction Area Jefferson County, Washington Olympia 90 5 405 101 Olympic NP Washington 3,000 3,000 0 Feet Data Sources: ESRI Data & Maps, Street Maps 2005 Notes: 1. The locations of all features shown are approximate. 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 3. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without permission. Transverse Mercator, State Plane South, North American Datum 1983 North arrow oriented to grid north Office: TACOPath: P:\1\1355035\GIS\135503500_F1.mxdMap Revised: 16 March 2020 maugust Station 1 Station 2 Station 3 200 200 0 Feet Station 1 Station 3S tation 2 Station 4 Legend Monitoring Well Stream Gage Shine Hub Weather Station Wahl Extraction Area MW-5 Station 1 Thomdyke Creek Creek 135503505 Dat e Exported: 03/18/20 Figure 2 Groundwater Data Shine Facility – Wahl Extraction Area Jefferson County, Washington 135503505 Dat e Exported: 03/18/ 19 Figure 3 Surface Water Data Shine Facility – Wahl Extraction Area Jefferson County, Washington Notes: 1. The stream channel at Station 1 bifurcated in Early 2017, forming two channels that resulted in a gravel bar forming where the staff gage is located. 2. The stream channel at Stations 1, 2, and 3 shifted such that the staff gage was located outside the wetted channel at various times; thus, the recorded staff gage readings are below the staff gage. Staff Gage Datum 1355035-05 Date Ex ported : 03/18 /20 Figure 4 Precipitation Data Shine Facility – Wahl Extraction Area Jefferson County, Washington Notes: 1. The computer that automatically downloads weather data at the Shine weather station was damaged in a power outage. The damage has affected precipitation data since 2012. Daily rainfall data was acquired from Kitsap Public utilities District No. 1’s Edgewater Station gage, located approximately 5 miles to the southwest, for June 18, 2009 through December 31, 2018. ATTACHMENT 1 Wahl Reclamation Map 2018 Miles Wahl Quarterly Inspection.pdfMicrosoft Word - 2018 Miles Wahl Quarterly Inspection 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 May 4, 2021 Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, Washington 98368 Attention: David W. Johnson Subject: 2018 On-Site Inspection of Miles Sand & Gravel Company, Shine Facility Wahl Extraction Area, WDNR Permit No. 70-013024 Jefferson County, Washington File No. 1355-035-05 This letter presents the results of the quarterly on-site inspection of the Shine Facility operated by Miles Sand & Gravel Company (Miles). Conditions 7 and 9 of Jefferson County Ordinance 08-706-04, amended by Jefferson County Ordinance 09-1213-10, require the submittal of a quarterly inspection report regarding mining operations located within a designated Aquifer Recharge Area. The intent is for this letter to satisfy the requirements of Conditions 7 and 9 and to present the results of the quarterly inspections in 2018. GeoEngineers, Inc. (GeoEngineers) conducted a review of workings for 2018 at the Wahl Extraction Area (WEA) within the Shine Facility on a quarterly basis. Eric Knoedler, Staff Hydrogeologist for GeoEngineers, and Ryan Ransavage, Earth Resources Manager for Miles, conducted a tour of the operations on August 17, 2018. Mr. Ransavage showed the boundaries of the permitted excavation area. The boundaries of the permitted area were marked with polyvinyl chloride (PVC) posts that extended 6 to 10 feet above ground. These posts were readily observed from a distance. The excavations, plant operations and mining activities were all occurring within the marked boundary. Approximately 82 acres have been disturbed within the WEA since the extraction process commenced in April 2013. Approximately 26 acres have been reclaimed in accordance with permit conditions. The last quarterly inspection in 2018 was conducted on October 19, 2018 by Mr. Knoedler and Eric Kittlesby, Environmental Specialist for Miles. The Washington Department of Natural Resources (DNR) Permit No. 70-013024 for the WEA was approved on May 2, 2012. The permitted area encompasses a total of 183 acres, which includes the following: ■ 156 acres in the mining area (137 acres will be disturbed during the mining process, 19 acres of setbacks, buffers and wetlands will remain “as-is”). ■ 9 acres for the utility and maintenance road easement. ■ 18 acres for the Operations and Processing Facility. Jefferson County Department of Community Development | May 4, 2021 Page 2 File No. 1355-035-05 SUMMARY The following is a summary of observations made during the quarterly site visits: ■ Boundaries of the permitted areas were clearly marked. ■ No mining activities were occurring outside of the permitted areas. ■ The stormwater pond, the location of a water quality monitoring point G002-SG02 (previously referred to as MP 1), was absent of sheen. Copies of the four quarterly Discharge Monitoring Reports (DMRs) that Miles submitted to the Department of Ecology are attached. The DMRs show the results at four monitoring points. The monitoring points G004-PG02, G003-PG01, G001-SG01, and G002-SG-02 and (previously referred to as MP 1, MP 2, MP 3 and MP 4, respectively) are shown on the attached Shine Facility Map. ■ Approximately 26 acres of the 82 acres mined since April 2013 have been reclaimed through 2018. RECOMMENDATIONS GeoEngineers has been monitoring the WEA since operations began. Based on the previous observations and the level of mining activity at the site, we recommended that the discharge monitoring should continue on a quarterly basis and the reporting should be done on an annual basis. Annual reporting of quarterly monitoring results was approved via email by David W. Johnson of Jefferson County on March 3, 2014. Please contact us if you have any questions concerning this report. Sincerely, GeoEngineers, Inc. Eric N. Knoedler, LG Bridget A. August, LG, LHG Hydrogeologist Senior Hydrogeologist Galan W. McInelly, LG, LHG Principal ENK:BAA:GWM:leh Attachments: Quarterly Discharge Monitoring Reports for 2018 Shine Facility Map cc: Ryan Ransavage Miles Sand & Gravel Company Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. May 4, 2021 Monitoring Period:01/01/2018 - 03/31/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 G001 4-T 1/23/18 8.4 No 7-W 2/14/18 8.4 No 11-W 3/14/18 8.0 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:01/01/2018 - 03/31/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 4-T 1/23/18 No 7-W 2/14/18 No 11-W 3/14/18 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:01/01/2018 - 03/31/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 4-T 1/23/18 No 7-W 2/14/18 No 11-W 3/14/18 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:01/01/2018 - 03/31/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 4-T 1/23/18 C No 7-W 2/14/18 C No 11-W 3/14/18 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 4/29/2018 6:27:05 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:04/01/2018 - 06/30/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 G001 2-T 4/10/18 8.0 No 7-Th 5/17/18 C No 10-Th 6/7/18 C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:04/01/2018 - 06/30/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 2-T 4/10/18 No 7-Th 5/17/18 No 10-Th 6/7/18 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:04/01/2018 - 06/30/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 2-T 4/10/18 No 7-Th 5/17/18 No 10-Th 6/7/18 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:04/01/2018 - 06/30/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 2-T 4/10/18 C No 7-Th 5/17/18 C No 10-Th 6/7/18 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Ryan Ransavage Signature Date 7/15/2018 7:13:53 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:07/01/2018 - 09/30/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 G001 3-Th 7/19/18 C No 7-T 8/14/18 C No 11-Th 9/13/18 C No Reporting Codes Used: C - No Discharge Version: 2 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:07/01/2018 - 09/30/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 3-M 7/16/18 No 7-T 8/14/18 No 11-Th 9/13/18 No Reporting Codes Used: C - No Discharge Version: 2 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:07/01/2018 - 09/30/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 3-M 7/16/18 No 7-T 8/14/18 No 11-Th 9/13/18 No Reporting Codes Used: C - No Discharge Version: 2 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:07/01/2018 - 09/30/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 3-M 7/16/18 C No 7-T 8/14/18 C No 11-Th 9/13/18 C No Reporting Codes Used: C - No Discharge Version: 2 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Ryan Ransavage Signature Date 10/29/2018 3:38:28 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:10/01/2018 - 12/31/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 G001 3-T 10/16/18 C No 7-M 11/12/18 C No 13-W 12/26/18 8.4 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:10/01/2018 - 12/31/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 3-T 10/16/18 No 7-M 11/12/18 No 13-W 12/26/18 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:10/01/2018 - 12/31/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 3-T 10/16/18 No 7-M 11/12/18 No 13-W 12/26/18 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:10/01/2018 - 12/31/2018 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 3-T 10/16/18 C No 7-M 11/12/18 C No 13-W 12/26/18 8.5 No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Ryan Ransavage Signature Date 1/29/2019 1:45:29 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 ! ! # # # # Thorndyke Creek G002-SG02 G001-SG01 G004-PG02G 003-PG01 1,800 Ft Shine Facility ° Legend Permit Boundary Waterbodies Drainage Area* g Catch Basins # Processwater to Ground # Processwater to Surface # Stormwater to Ground # Stormwater to Surface ! Bulk Material Unloading ! Fuel ! Outdoor Material Storage ! Outdoor Processing ! Shop ! Underground Storage Tank/Fuel *Area slopes to monitoring point unless noted otherwise. Flow 2014 Miles Shine Facility Conditions 7 9_Quarterly Inspection Final Report.pdfMicrosoft Word - Miles Shine Facility Conditions 7 9_Quarterly Inspection Final Report.docx 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 January 26, 2015 Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, Washington 98368 Attention: David W. Johnson Subject: 2014 On-Site Inspection of Miles Sand & Gravel Company, Shine Facility Wahl Extraction Area, WDNR Permit No. 70-013024 Jefferson County, Washington File No. 1355-035-00 This letter presents the results of the quarterly on-site inspection of the Shine Facility operated by Miles Sand & Gravel Company (Miles). Conditions 7 and 9 of Jefferson County Ordinance 08-706-04, amended by Jefferson County Ordinance 09-1213-10, requires the submittal of a quarterly inspection report regarding mining operations located within a designated Aquifer Recharge Area. The intent is for this letter to satisfy the requirements of Conditions 7 and 9 and to present the results of the quarterly inspections in 2014. On January 16, 2015, Li Wang, a hydrogeologist with GeoEngineers, Inc. (GeoEngineers), inspected the Wahl Extraction Area (WEA) within the Shine facilities. Ryan Ransavage, Environmental Specialist for Miles, provided a tour of the operations. Mr. Ransavage showed the boundaries of the permitted excavation area. The boundaries of the permitted area are marked with PVC posts that extend 6 to 10 feet above ground. These posts were readily observed from a distance. The excavations, plant operations, and mining activities were all occurring within the marked boundary. No reclamation was occurring within the WEA since the extraction process had commenced in April 2013. Stumps and overburden soils salvaged from excavated areas have been stockpiled on site for future reclamation. The Washington Department of Natural Resources Permit No. 70-013024 for the WEA was approved on May 2, 2012. The permitted area encompasses a total of 183 acres, which includes the following: ■ 156 acres in the mining area (137 acres will be disturbed during the mining process, 19 acres of setbacks, buffers and wetlands will remain “as-is”). ■ 9 acres for the utility and maintenance road easement. ■ 18 acres for the Operations and Processing Facility. Monitoring Period:01/01/2014 - 03/31/2014 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP1 - Storm to Ground - Exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP3 MP3 2-W 1/8/14 C No 8-M 2/17/14 C No 12-Th 3/20/14 C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 3 Monitoring Period:01/01/2014 - 03/31/2014 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP2 - Process to Ground - exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-1 MP-1 MP-1 MP2 MW01 2-W 1/8/14 C No C No No 8-M 2/17/14 8.01 No 230 No No 12-Th 3/20/14 7.88 No 190 No No Month 1 Average C <= 500 Month 2 Average 230 <= 500 Month 3 Average 190 <= 500 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 3 Monitoring Period:01/01/2014 - 03/31/2014 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP3 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek 01 01 Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 4/23/2014 7:04:43 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 3 Monitoring Period:04/01/2014 - 06/30/2014 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP1 - Storm to Ground - Exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP3 MP3 5-W 4/30/14 7.13 No 7-T 5/13/14 7.00 No 13-F 6/27/14 7.01 No Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 2 Monitoring Period:04/01/2014 - 06/30/2014 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP2 - Process to Ground - exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-1 MP-1 MP-1 MP2 MW01 5-W 4/30/14 7.44 No 61 No No 7-T 5/13/14 7.76 No 45 No No 13-F 6/27/14 8.12 No 65 No No Month 1 Average 61 <= 500 Month 2 Average 45 <= 500 Month 3 Average 65 <= 500 Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 7/23/2014 4:15:09 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 2 Monitoring Period:07/01/2014 - 09/30/2014 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP1 - Storm to Ground - Exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP3 MP3 5-M 7/28/14 8.20 No 9-F 8/29/14 8.34 No 13-F 9/26/14 8.36 No Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 2 Monitoring Period:07/01/2014 - 09/30/2014 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP2 - Process to Ground - exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-1 MP-1 MP-1 MP2 MW01 5-M 7/28/14 7.00 No 100 No No 9-F 8/29/14 7.00 No 100 No No 13-F 9/26/14 7.00 No 100 No No Month 1 Average 100 <= 500 Month 2 Average 100 <= 500 Month 3 Average 100 <= 500 Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 10/30/2014 11:50:23 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 2 Monitoring Period:10/01/2014 - 12/31/2014 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP1 - Storm to Ground - Exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP3 MP3 2-F 10/10/14 7.18 No 8-Th 11/20/14 8.01 No 11-F 12/12/14 7.69 No Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 2 Monitoring Period:10/01/2014 - 12/31/2014 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP2 - Process to Ground - exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-1 MP-1 MP-1 MP2 MW01 2-F 10/10/14 8.13 No 120 No No 8-Th 11/20/14 8.42 No 140 No No 11-F 12/12/14 8.26 No 130 No No Month 1 Average 120 <= 500 Month 2 Average 140 <= 500 Month 3 Average 130 <= 500 Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 1/16/2015 9:55:33 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 2 2019 Wahl Extraction Area Groundwater Monitoring Report.pdfMicrosoft Word - 2019 Wahl Extraction Area Groundwater Monitoring Report 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 February 12, 2021 Miles Sand & Gravel Company 400 Valley Avenue NE Puyallup, Washington 98372 Attention: Ryan Ransavage Subject: Letter Report 2019 Groundwater, Surface Water and Precipitation Monitoring Data Shine Facility – Wahl Extraction Area Jefferson County, Washington File No. 1355-035-06 Monitoring requirements at the Shine Facility were set forth by Jefferson County Department of Community Development (DCD) as conditions of the Wahl Permit (MLA03-0037), dated July 18, 2005, prepared originally for Fred Hill Materials (FHM) and Ordinance 08-0706-04 (MLA10-00073), Amendment 09-1213-10 dated December 18, 2010. The purpose of this letter is to provide a summary of the water monitoring program implemented for the Wahl Extraction Area (WEA) through December 31, 2019 and to compare the high groundwater table elevations with the proposed excavation elevations at the WEA. PREVIOUS AND CURRENT MONITORING The original monitoring, initiated in August 2005, was conducted by CR Hydrogeologic Consulting FHM. GeoEngineers, Inc. (GeoEngineers) assumed the monitoring duties in November 2009 when Miles Sand & Gravel Company (Miles) commenced leasing the operations at the WEA. The current monitoring program includes groundwater, surface water, and precipitation data acquisition. The monitoring locations are shown on Figure 1. Groundwater and surface water data are presented on Figures 2 and 3, respectively. Precipitation data are shown on Figure 3. The following are elements of the current monitoring program: Groundwater ■ Groundwater level monitoring at the WEA began in August 2005 with the installation of an automated water-level sensor (consisting of a combined pressure transducer and datalogger) in monitoring well MW-9, a monitoring well located in the southwest portion of the WEA (Figure 1). The transducer measures and records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The transducer provided reliable data from August 2005 through November 2016. Miles Sand & Gravel Company | February 12, 2021 Page 2 File No. 1355-035-06 ■ By late 2016, excavation had progressed to the area surrounding monitoring well MW-9 and the wellhead was nearly inaccessible. The transducer in monitoring well MW-9 was removed on November 7, 2016. Monitoring well MW-9 was not accessible between 2017 and 2019. The casing for monitoring well MW-9 will be modified, and the transducer will be reinstalled after excavation and reclamation activities are complete in the area surrounding monitoring well MW-9. ■ A transducer was installed in the Shine Hub water supply well (Figure 1) in April 2007. The transducer malfunctioned in June 2010 and was replaced in September 2010 with new equipment from the same manufacturer. The transducer malfunctioned again in April 2013 and was repaired and reinstalled in July 2013. The transducer also temporarily stopped recording between March and May 2018. With the exception of a few months in 2010, 2013 and in 2018, the monitoring equipment has provided reliable data. ■ In January 2010, Miles installed additional transducers in monitoring wells MW-5 and MW-8 (Figure 1) to estimate a groundwater surface profile beneath the WEA. The installed transducers were from the same manufacturer as those installed in monitoring well MW-9 and the Shine Hub water supply well. The monitoring equipment installed in monitoring well MW-5 provided reliable data through April 2012. The monitoring equipment installed in monitoring well MW-8 provided reliable data through mid-March 2018. ■ In 2012, monitoring well MW-5 was deepened to explore for a groundwater supply for the facility. The exploration was unsuccessful, and MW-5 was decommissioned. Thus, the transducer from MW-5 was moved to monitoring well MW-15 (Figure 1) on May 2, 2012. Monitoring well MW-15 is located approximately 550 feet south of the proposed mining area and provides a monitoring point for the southern portion of the WEA. ■ The vented transducer in MW-8 was replaced in October 2015 with a new non-vented transducer (INW PT2X 50-psi). ■ By early 2018, excavation had progressed to the area surrounding monitoring well MW-8 and the wellhead was nearly inaccessible. The transducer in monitoring well MW-8 was removed on March 16, 2018. Monitoring well MW-8 was not accessible throughout the remainder of 2018 and all of 2019. The casing for monitoring well MW-8 will be modified, and the transducer will be reinstalled after excavation and reclamation activities are complete in the area surrounding monitoring well MW-8. ■ The transducer removed from monitoring well MW-8 was installed in monitoring well MW-16, located approximately 1,430 feet northeast of monitoring well MW-8 (Figure 1). The transducer malfunctioned and was deemed inoperable; thus, a new non-vented transducer from the same manufacturer (INW LevelScout 30-psi) was installed on September 21, 2018. No survey elevation is available for the wellhead at monitoring well MW-16; thus, groundwater elevations have not been established at this monitoring location. We will continue to measure water levels at MW-16. Once the wellhead is surveyed, measured groundwater levels will be converted to elevations and plotted on Figure 2. Surface Water ■ Three surface water stations (Stations 1 through 3) were established in September 2005 on Thorndyke Creek near the WEA (Figure 1). One of the stations (Station 3) is located on an unnamed tributary and two are located on Thorndyke Creek, with Station 2 upstream and Station 1 located downstream of the confluence with the unnamed tributary. The stream stage height at each station is recorded on an hourly basis using an automated water-level sensor. The streamflow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. Miles Sand & Gravel Company | February 12, 2021 Page 3 File No. 1355-035-06 ■ An additional surface water monitoring point (Station 4) is located on Thorndyke Creek approximately 1 mile upstream of its mouth (Figure 1). The stream stage height is recorded on an hourly basis using an automated water-level sensor. Stream flow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ The automated equipment previously installed at the surface water stations was replaced at all four stations in 2011 and 2012 with more reliable sensors. The sensor installed at Station 4 malfunctioned in April 2014 and was repaired and reinstalled in June 2014. ■ The stream channel at Station 1 experienced significant channel migration beginning in early 2016. A large precipitation event in January 2016 moved the channel westward and away from the staff gage, leaving the staff gage out of the channel. The stream occupied this relocated channel through 2017 and 2018; thus, staff gage readings at Station 1 are not representative of actual surface water levels starting in January 2016. ■ In spring 2017, the stream channel at Station 3 bifurcated, and the staff gage was positioned at the edge of a center bar of the stream. Throughout most of 2018 and 2019, the staff gage was several feet west of the wetted channel; thus, staff gage readings at Station 3 are not representative of actual surface water levels starting in spring 2017. ■ The stream channel and staff gage at Station 2 were affected by a small log jam sometime between the winter and spring 2017 monitoring events. The logs damaged the staff gauge tape and caused a slight tilt to the staff gage. The logs were removed during the spring monitoring event to prevent further damage to the staff gage and the gage tape was replaced. ■ The stream channel at Station 4 bifurcated in early 2017, resulting in the formation of a gravel bar in the middle of the stream and deepening of the channel at the staff gauge location. The condition of the staff gage was checked during each of the 2019 monitoring events. No modifications to the gage have been needed. ■ In January 2017, communication could not be established with the transducer installed at Station 3. The transducer was removed, sent in for repair, and reinstalled in June 2017. ■ In May 2017, the transducer at Station 2 malfunctioned and was removed, sent in for repair, and reinstalled in June 2017 but was subsequently moved to Station 1 by Miles and the Station 2 transducer was replaced with a new transducer in July 2017. ■ In October 2017, the transducer at Station 1 malfunctioned and was removed and sent in for repair. It was reinstalled in November 2017. ■ New staff gage tapes were installed at Station 1, Station 2, and Station 4 in July 2017. ■ Miles installed new non-vented transducers (INW LevelScout 30-psi) at all four stations on September 21, 2018. Precipitation ■ A weather station was established on the roof of the office building at the current Shine Hub in September 2005. The data, collected on an hourly basis, includes precipitation, temperature, and wind direction and speed. Between March 14 and October 17, 2012, the weather station experienced a loss of data. Periodic data losses from September 1, 2013 through December 31, 2016 have occurred as a result of damage caused by power outages at the site. Therefore, the data for 2013 through 2016 is incomplete. A comparable dataset was acquired for January 1, 2012 through December 31, 2018 from the Kitsap Public Utility District No. 1’s (KPUD) rain gage at Edgewater, located on the Kitsap Peninsula approximately 5 miles southeast of the WEA. Miles Sand & Gravel Company | February 12, 2021 Page 4 File No. 1355-035-06 MONITORING DATA SUMMARY GeoEngineers has developed plots of the monitoring data described below. Mining has commenced in the WEA and several years of background groundwater, surface water and precipitation data have now been acquired. Groundwater Data The elevations of groundwater monitoring points (rims of the well casings) MW-5, MW-8, MW-9, MW-15, and the Shine Hub water supply well have been surveyed relative to the National Geodetic Vertical Datum (NGVD) 1929 datum. The water levels measured in each monitoring well have been converted to groundwater elevations using surveyed monitoring point elevations. The elevation of groundwater monitoring point MW-16 has not been surveyed; thus, groundwater elevations have not been established at this location. A plot of groundwater elevations from monitoring wells MW-5, MW-8, MW-9, MW-15, and the Shine Hub water supply well is presented on Figure 2. The water supply well is located near the office buildings at the Shine Facility (Figure 1). Monitoring wells MW-5, MW-8, MW-9, and MW-16 are located within the WEA; monitoring well MW-15 is located approximately 550 feet south of the WEA (Figure 1). Shine Hub Water Supply Well The hourly data from the Shine Hub water supply well are shown on Figure 2 as points because the well pump cycles on and off several times a day. The lowest water level elevations in the Shine Hub water supply well represent pumping water levels and the highest represent fully or nearly recovered (i.e., static) water levels. The data in-between represent water levels that are either recovering or are being drawn down at various stages of the pumping cycle. Seasonal water level fluctuations in the Shine Hub water supply well are similar to the other site monitoring wells (described below), located over a mile west of the Shine Hub well, and are attributed to seasonal fluctuations in precipitation. Groundwater elevations observed at the Shine Hub water supply well showed relatively sharp increases in early 2016 early 2017 (Figure 2). Groundwater elevations remained elevated through 2019 relative to pre-2016 groundwater elevations. A similar pattern was also observed in monitoring wells MW-8 and MW-15. This overall rise in groundwater elevations is likely the result of recharge from increased precipitation between 2016 and 2017 (Figure 4). The effects of increased annual precipitation and large individual precipitation events are also shown in the surface water monitoring records (Figure 3). Groundwater elevations at the Shine Hub water supply well appear to have peaked in early 2018 and may now be returning to pre-2016 water level elevations, which is likely the result of decreased precipitation in 2018 and 2019 compared to total rainfall in 2016 and 2017. Monitoring Wells MW-8, MW-9, MW-15, and MW-16 The groundwater elevations in all the monitoring wells show similar seasonal fluctuations of rising levels in the wet winter months and declining levels between spring and fall. The highest recorded groundwater elevation for monitoring well MW-8 was 282.2 feet (NGVD 29) recorded in May 2017. Monitoring at well MW-8 was discontinued in March 2018 because excavation surrounding the well rendered the wellhead inaccessible. The dataset with the longest period of record is for monitoring well MW-9, beginning in August 2005 through November 2016. The highest recorded groundwater elevation for monitoring well MW-9 was Miles Sand & Gravel Company | February 12, 2021 Page 5 File No. 1355-035-06 281.5 recorded in April 2016. The highest recorded groundwater elevation for monitoring well MW-15 was 256.8 feet recorded in May 2017. No survey elevation is available for the wellhead at monitoring well MW-16; thus, groundwater elevations have not been established at this monitoring location. We will continue to measure water levels at MW-16. Once the wellhead is surveyed, measured groundwater levels will be converted to elevations and plotted on Figure 2. As discussed above, the observed trend of rising groundwater elevations starting in 2016 at MW-8 and MW-15 is likely attributed to increased precipitation during the winters of 2016 and 2017. Groundwater elevations at MW-15 appear to have peaked in early 2017 and may now be returning to pre-2016 water level elevations, which is likely the result of decreased precipitation in 2018 and 2019 compared to total rainfall in 2016 and 2017. Surface Water Data Figure 3 shows a plot of the surface water data for Stations 1 through 4, located on Thorndyke Creek and one of its tributaries. Figure 3 shows the stage heights as recorded on a 30-minute interval using dataloggers. The stage height dataset has had relatively short periods when the data was lost due to faulty monitoring sensors. In each case, the equipment was repaired or replaced. Figure 3 also shows the streamflow rates calculated from flow velocities that were measured by wading the stream; these rates are plotted on a logarithmic vertical scale (right-hand axis). Station 1 The highest measured flow at Station 1, located near the WEA (Figure 1), in 2019 was 5.7 cubic feet per second (cfs) during the February monitoring event and the lowest measured flow was 0.77 cfs during the November monitoring event. The stream channel at Station 1 experienced significant channel migration beginning in early 2016. Figure 3 shows a drop in recorded water levels following a large precipitation event in January 2016, which moved the channel westward and away from the staff gage, leaving the staff gage out of the channel. The stream occupied this relocated channel from 2017 through 2019; thus, staff gage readings at Station 1 (Figure 3) are not representative of actual surface water levels starting in January 2016. Station 2 The highest measured flow at Station 2 (Figure 1) in 2019 was 2.8 cfs during the February monitoring event and the lowest measured flow was 0.033 cfs during the November monitoring event. The stream channel position at Station 2 has meandered somewhat since at least 2010. As shown on Figure 3, measured surface water levels dropped below the staff gage datum at times between 2010 and 2019 when the staff gage was near the bank or out of the channel. Station 3 The highest measured flow at Station 3 (Figure 1) in 2019 was 2.2 cfs during the February monitoring event and the lowest measured flow was 0.56 cfs during the August monitoring event. The stream channel at Station 3 migrated westward beginning in late 2016. In spring 2017, the stream channel bifurcated, and the staff gage was positioned at the edge of a center bar of the stream. Throughout most of 2018 and 2019, the staff gage was several feet west of the wetted channel; thus, staff gage readings at Station 3 (Figure 3) are not representative of actual surface water levels starting in spring 2017. Miles Sand & Gravel Company | February 12, 2021 Page 6 File No. 1355-035-06 Station 4 The highest measured flow at Station 4 (Figure 1) in 2019 was 7.1 cfs during the February monitoring event and the lowest measured flow was 2.3 cfs during the August and November monitoring events. The stream channel at Station 4 bifurcated in early 2017 resulting in the formation of a gravel bar in the center of the stream. Flow diverted around the gravel bar appears to be incising the channel at the location of the staff gage for Station 4. Significant channel migration was observed both upstream and downstream of Station 4 during the 2019 monitoring events that may have resulted from multiple fallen trees impacting stream flow. Based on observations made during monitoring events conducted between 2017 and 2019, the channel at this location appears to be migrating westward. Precipitation Data Figure 4 shows a plot of the daily precipitation recorded at the weather station located on the roof of the Shine Hub office (2005 through 2016) and the KPUD’s Edgewater weather station (2009 through 2019). As stated above, it appears from the downloaded data that the Shine Hub weather station has had periods of malfunction and data loss since 2012. The weather station has not been collecting any precipitation data since early 2017. The Shine weather station data plotted for 2012 through 2019 (Figure 4) is supplemented by data from the KPUD Edgewater Station rain gage until the Shine weather station can be repaired. Comparing days when both stations recorded data, it appears that there has been significantly more rainfall at the Edgewater gage than recorded at the Shine weather station. The highest recorded daily precipitation event was 3.71 inches on January 21, 2016. The highest recorded daily precipitation event for 2019 was 1.99 inches on December 20, 2019. GROUNDWATER ELEVATIONS VERSUS PROPOSED EXCAVATION FLOOR The proposed excavation elevations are shown on the attached plan titled “WDNR Permit No. 70-013024 Final Reclamation Map” as prepared by Team 4 Engineering. The plan shows that the excavation will stay 10 feet above the high groundwater table, as a currently required condition, in the central and north portions of the WEA. Miles proposes to excavate to Elevation 275 feet in the southernmost extent of the WEA. Prior to 2012, there was a lack of groundwater monitoring data points in this area. Monitoring of MW-8, located within in WEA, and MW-15, located approximately 550 feet south of the southern WEA mining disturbance boundary (Figure 1), indicates that the highest water levels recorded at MW-8 and MW-15 were Elevation 282.2 feet and 256.8 feet, respectively, in May 2017. The highest groundwater elevation recorded at MW-15 in 2019 was Elevation 254.8 feet in April 2019, which is about 2 feet lower than the peak groundwater elevation recorded at the well. Based on a uniform gradient between MW-8 and MW-15, the highest groundwater elevation would be approximately Elevation 262 feet at the southern mining disturbance boundary (Attachment 1) based on historical peak groundwater elevations. Thus, the proposed excavation elevation of Elevation 275 feet will be greater than 10 feet above the highest groundwater table based on available data. CONCLUSIONS Monitoring data for groundwater, surface water, and precipitation at the WEA are being collected by GeoEngineers on an ongoing basis to develop an extensive background data set, as required under permit Miles Sand & Gravel Company | February 12, 2021 Page 7 File No. 1355-035-06 conditions and local ordinances. Data have been collected since 2005, and additional groundwater monitoring locations installed in 2009 have allowed the estimation of a historical groundwater elevation profile beneath the planned mining area. Based on the groundwater data collected to date and historical groundwater elevation trends, the gravel mine excavations proposed by Miles at the WEA will be 10 feet or greater above the highest projected groundwater surface elevations. RECOMMENDATIONS Based on the monitoring conducted in 2019, we have the following recommendations: ■ We recommend surveying the elevation of the wellhead at monitoring well MW-16 so groundwater levels can be translated to groundwater elevations. ■ We recommend repairing or replacing the on-site Shine weather station as soon as possible so that it records accurate precipitation data. ■ We recommend that the stream channels be observed to evaluate whether the surface water gage stations need to be repositioned or deepened to monitor stream gage heights effectively. Please contact us if you have any questions about the water monitoring program. Sincerely, GeoEngineers, Inc. Eric N. Knoedler, LG Hydrogeologist Bridget A. August, LG, LHG Galan W. McInelly, LG, LHG Senior Hydrogeologist Principal ENK:BAA:GWM:leh Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. Attachments: Figure 1. Vicinity Map Figure 2. Groundwater Data Figure 3. Surface Water Data Figure 4. Precipitation Data Attachment 1. Wahl Reclamation Map Thorndyke Rd Peabody Way S Point Rd Thorndyke Rd 104 Wahl Lake Rd Thorndyke Rd Groves Way Dickey St Shine Hub WaterS upply Well MW-9 MW-5 MW-8 MW-15 MW-16 Shine Hub Weather Station Vicinity Map Figure 1 Shine Facility - Wahl Extraction Area Jefferson County, Washington Olympia 90 5 405 101 Olympic NP Washington 3,000 3,000 0 Feet Data Sources: ESRI Data & Maps, Street Maps 2005 Notes: 1. The locations of all features shown are approximate. 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 3. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without permission. Transverse Mercator, State Plane South, North American Datum 1983 North arrow oriented to grid north Office: TACOPath: P:\1\1355035\GIS\135503500_F1.mxdMap Revised: 16 March 2020 maugust Station 1 Station 2 Station 3 200 200 0 Feet Station 1 Station 3S tation 2 Station 4 Legend Monitoring Well Stream Gage Shine Hub Weather Station Wahl Extraction Area MW-5 Station 1 Thomdyke Creek Creek 135503506 Dat e Exported: 03/18/20 Figure 2 Groundwater Data Shine Facility – Wahl Extraction Area Jefferson County, Washington 135503506 Dat e Exported: 03/18/20 Figure 3 Surface Water Data Shine Facility – Wahl Extraction Area Jefferson County, Washington Staff Gage Datum Notes: 1. The stream channel at Station 1 bifurcated in Early 2017, forming two channels that resulted in a gravel bar forming where the staff gage is located. 2. The stream channel at Stations 1, 2, and 3 shifted such that the staff gage was located outside the wetted channel at various times; thus, the recorded staff gage readings are below the staff gage. 135503506 Dat e Exported: 03/18/20 Figure 4 Precipitation Data Shine Facility – Wahl Extraction Area Jefferson County, Washington Notes: 1. The computer that automatically downloads weather data at the Shine weather station was damaged in a power outage. The damage has affected precipitation data since 2012. Daily rainfall data was acquired from Kitsap Public utilities District No. 1’s Edgewater Station gage, located approximately 5 miles to the southwest, for June 18, 2009 through December 31, 2018. ATTACHMENT 1 Wahl Reclamation Map 2017 Wahl Extraction Area Groundwater Monitoring Report.pdfMicrosoft Word - 2017 Wahl Extraction Area Groundwater Monitoring Report.docx 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 August 6, 2018 Miles Sand & Gravel Company 400 Valley Avenue NE Puyallup, Washington 98372 Attention: Ryan Ransavage Subject: Letter Report 2017 Groundwater, Surface Water and Precipitation Monitoring Data Shine Facility – Wahl Extraction Area Jefferson County, Washington File No. 1355-035-04 Monitoring requirements at the Shine Facility were set forth by Jefferson County Department of Community Development (DCD) as conditions of the Wahl Permit (MLA03-0037), dated July 18, 2005, prepared originally for Fred Hill Materials (FHM) and Ordinance 08-0706-04 (MLA10-00073), Amendment 09-1213-10 dated December 18, 2010. The purpose of this letter is to provide a summary of the water monitoring program implemented for the Wahl Extraction Area (WEA) through December 31, 2017 and to compare the high groundwater table elevations with the proposed excavation elevations at the WEA. PREVIOUS AND CURRENT MONITORING The original monitoring, initiated in August 2005, was conducted by CR Hydrogeologic Consulting FHM. GeoEngineers, Inc. (GeoEngineers) assumed the monitoring duties in November 2009 when Miles Sand & Gravel Company (Miles) commenced leasing the operations at the WEA. The monitoring locations are shown on Figure 1. The following are elements of the current monitoring program: Groundwater ■ Groundwater level monitoring at the WEA began in August 2005 with the installation of an automated water-level sensor (consisting of a combined pressure transducer and datalogger) in monitoring well MW-9, a monitoring well located in the southwest portion of the WEA. The automated sensor measures and records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The monitoring equipment has provided reliable data since 2005. ■ A water-level sensor was installed in the Shine Hub water supply well in April 2007. The sensor malfunctioned in June 2010 and was replaced in September 2010 with new equipment from the same Miles Sand & Gravel Company | August 6, 2018 Page 2 File No. 1355-035-04 manufacturer. The sensor malfunctioned again in April 2013 and was repaired and reinstalled in July 2013. With the exception of a few months in 2010 and in 2013, the monitoring equipment has provided reliable data. ■ In January 2010, additional monitoring wells (MW-5 and MW-8) equipped with sensors were added by Miles to estimate a groundwater surface profile beneath the WEA. The installed sensors are from the same manufacturer as those installed in monitoring well MW-9 and the Shine Hub well. The current monitoring equipment provides reliable data. ■ In 2012, monitoring well MW-5 was deepened to explore for a groundwater supply for the facility. The exploration was unsuccessful and MW-5 was decommissioned. Thus, the water level sensor from MW-5 was moved to monitoring well MW-15 on February 15, 2012. MW-15 is located approximately 550 feet south of the proposed mining area and now provides a monitoring point for the southern portion of the WEA. ■ In July 2015, the vented transducer in MW-8 stopped functioning and was replaced on October 2015 with a new non-vented transducer (INW PT2X 50-psi). ■ By late 2016, excavation had progressed to the area surrounding monitoring well MW-9 and the wellhead was nearly inaccessible. Therefore, the transducer in MW-9 was removed on November 7, 2016. ■ In early 2017, excavation removed the materials surrounding MW-9 leaving the top of the well casing approximately 50 feet in the air. Monitoring well MW-9 was not accessible during 2017. The MW-9 casing will be modified and the transducer will be reinstalled in MW-9 after the excavation and reclamation surrounding MW-9 is completed. Surface Water ■ Three surface water stations were established in September 2005 on Thorndyke Creek near the WEA. One of the stations (Station 3) is located on an unnamed tributary and two are located on Thorndyke Creek, with Station 2 upstream and Station 1 located downstream of the confluence with the unnamed tributary. The stream stage height at each station is recorded on an hourly basis using an automated sensor. The streamflow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ An additional surface water monitoring point (Station 4) is located on Thorndyke Creek approximately 1 mile upstream of its mouth. The stream stage height is recorded on an hourly basis using an automated sensor. The stream flow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. The sensor installed at Station 4 malfunctioned in April 2014 and was repaired and reinstalled in June 2014. ■ The automated equipment previously installed at the surface water stations was replaced at all four stations in 2011 and 2012 with more reliable sensors. ■ The stream channel at Stations 1 and 3 bifurcated in early 2017, which resulted in the formation of a gravel bar where the staff gages were located. Thus, recorded staff gage readings are below their respective staff gages. Miles Sand & Gravel Company | August 6, 2018 Page 3 File No. 1355-035-04 ■ The stream channel and staff gauge at Station 2 were affected by a small log jam sometime between the winter and spring 2017 monitoring events. The logs damaged the staff gauge tape and caused a slight tilt to the staff gauge. The logs were removed during the spring monitoring event to prevent further damage to the staff gauge and the gauge tape was replaced. ■ The stream channel at Station 4 bifurcated in early 2017, resulting in the formation of a gravel bar in the middle of the stream and deepening of the channel at the staff gauge location. The condition of the staff gauge will be assessed during 2018 monitoring events to determine if the gauge needs to be reinstalled at a greater depth. ■ In January 2017 we could not communicate with the transducer installed at Station 3. The transducer was removed, sent in for repair, and reinstalled in June 2017. ■ In May 2017 the transducer at Station 2 malfunctioned and was brought back to the office for repair. It was reinstalled in June 2017 but was subsequently moved to Station 1 by Ryan Ransavage and replaced with a new transducer in July 2017. ■ In October 2017 the transducer at Station 1 malfunctioned and was brought back to the office for repair. It was reinstalled in November 2017. ■ New staff gage tapes were installed at Stations 1, 2 and 4 in July 2017. Precipitation ■ A weather station was established on the roof of the office building at the current Shine Hub in September 2005. The data, collected on an hourly basis, includes precipitation, temperature and wind direction and speed. Between March 14 and October 17, 2012, the weather station experienced a loss of data. Periodic data losses from September 1, 2013 through December 31, 2016 have occurred as a result of damage caused by power outages at the site. Therefore, the data for 2013 through 2016 is incomplete. A comparable dataset was acquired for January 1, 2012 through December 31, 2017 from the Kitsap Public Utility District No. 1’s (KPUD) rain gage at Edgewater, located on the Kitsap Peninsula approximately 5 miles southeast of the WEA. MONITORING DATA SUMMARY GeoEngineers has developed plots of the monitoring data described below. Mining has commenced in the WEA and several years of background groundwater, surface water and precipitation data have now been acquired. Groundwater Data The elevations of the groundwater monitoring points (rims of the well casings) have been surveyed relative to the National Geodetic Vertical Datum (NGVD) 1929 datum. The water levels measured in each monitoring well have been converted to groundwater elevations. Figure 2 shows a plot of groundwater elevations from the four monitoring wells and the Shine Hub water supply well. The water supply well is located near the office buildings at the Shine Facility (Figure 1). Monitoring wells MW-5, MW-8 and MW-9 are located within the WEA; monitoring well MW-15 is located approximately 550 feet south of the WEA. Miles Sand & Gravel Company | August 6, 2018 Page 4 File No. 1355-035-04 Shine Hub Water Supply Well The hourly data from the Shine Hub water supply well are shown on Figure 2 as points because the well pump cycles on and off several times a day. The lowest water level elevations in the Shine Hub water supply well represent pumping water levels and the highest represent fully or nearly recovered water levels. The data in-between represent water levels that are either recovering or are being drawn down at various stages of the pumping cycle. Seasonal water level fluctuations in the supply well are similar to the other site monitoring wells (described below) located over a mile west of the Shine Hub well and are attributed to seasonal groundwater fluctuations. The groundwater elevation in the supply well showed a relatively sharp increase in early 2016 and a longer increase through the first half of 2017 (Figure 2). This pattern was also observed in MW-8, MW-9 and MW-15 in 2016 and in MW-8 and MW-15 in 2017 (MW-9 was not monitored in 2017). This may be a result of recharge from relatively large precipitation events in early 2016 and early 2017 (Figure 4). The effects of these precipitation events are also shown in the surface water monitoring records (Figure 3). However, the frequency and duration of pumping at the supply well was decreased starting in 2016, and the general trend of increasing water levels observed in the supply well may also be related to less groundwater extraction from the aquifer at that location. Monitoring Wells MW-5, MW-8, MW-9 and MW-15 The dataset with the longest period of record is for monitoring well MW-9, beginning in August 2005 through November 2016. The groundwater elevations in all the wells show similar seasonal fluctuations of rising levels in the winter wet months and declining levels between spring and fall. The highest recorded groundwater elevations for the monitoring wells were all recorded in May 2017. These groundwater elevations were 282.1 and 256.8 feet (NGVD 29) for MW-8 and MW-15, respectively (MW-9 was not monitored during 2017). These groundwater elevations are about 1 to 1 ½ feet higher than the previous highs seen in 2016. As discussed above, the trend of increasing groundwater elevations starting in 2016 in MW-8, MW-9 and MW-15 may be somewhat attributed to increased precipitation during the winters of 2016 and 2017. Surface Water Data Figure 3 shows a plot of the surface water data for Stations 1 through 4, located on Thorndyke Creek. Figure 3 shows the stage heights as recorded at a 30-minute interval using dataloggers. The stage height dataset has had relatively short periods when the data was lost due to faulty monitoring sensors. In each case, the equipment was replaced. Figure 3 also shows the streamflow rates calculated from flow velocities that were measured by wading the stream; these are plotted on a logarithmic vertical scale (right-hand axis). Station 1 The largest measured flow at Station 1, located near the WEA, was 3.0 cubic feet per second (cfs) during the January monitoring event and the lowest measured flow was 2.4 cfs during the October monitoring event. The stream channel at Station 1 experienced significant channel migration beginning in early 2016. Figure 3 shows a drop in recorded water levels following a large precipitation event in January 2016, which moved the channel west-ward and away from the staff gage. Miles Sand & Gravel Company | August 6, 2018 Page 5 File No. 1355-035-04 Station 2 The largest measured flow at Station 2 was 1.2 cfs during the January monitoring event and the lowest measured flow was 0.20 cfs during the October monitoring event. The stream channel position at Station 2 has meandered somewhat since at least 2013. As shown in Figure 3, measured surface water levels drop below the staff gage datum at times during 2013 through 2014 and in 2016 when the staff gage was near the bank or out of the channel. The channel had migrated back toward the staff gage in early 2015 as indicated by higher surface water levels throughout 2015. Station 3 The largest measured flow at Station 3 was 2.5 cfs during the January monitoring event and the lowest measured flow was 1.3 cfs during the July monitoring event. The stream channel at Station 3 migrated west-ward beginning in late 2016. In spring 2017, the stream channel bifurcated, and the staff gage was positioned at the edge of a center bar of the stream. Station 4 The largest measured flow at Station 4 was 19.6 cfs during the May monitoring event and the lowest measured flow was 16.7 cfs during the October monitoring event. The stream channel at Station 4 bifurcated in early 2017 resulting in the formation of a gravel bar in the center of the stream. Flow diverted around the gravel bar appears to be incising the channel at the location of the staff gage for Station 4. Significant channel migration was observed upstream of Station 4 that may have resulted from multiple fallen trees impacting stream flow. Based on the observations in 2017, the channel at this location appears to be migrating west-ward. Precipitation Data Figure 4 shows a plot of the daily precipitation at the weather station located on the roof of the Shine Hub office. The highest recorded daily precipitation event was 3.11 inches on December 3, 2007. As stated above, it appears from the downloaded data that the station has had periods of malfunction in 2012 and has recorded only partial data since September 2013. This is evident in the plot for 2012 through 2017. The Shine weather station data for 2012 through 2017 shown on Figure 4 is supplemented by data from the KPUD’s Edgewater rain gage as a substitute until the Shine weather station is repaired. Comparing days when both stations recorded data it appears that there has been significantly more rainfall at the Edgewater gage than recorded at the Shine weather station. GROUNDWATER ELEVATIONS VERSUS PROPOSED EXCAVATION FLOOR The proposed excavation elevations are shown on the attached plan titled “WDNR Permit No. 70-013024 Final Reclamation Map” as prepared by Team 4 Engineering. The plan shows that the excavation will stay 10 feet above the high groundwater table, as a currently required condition, in the central and north portions of the WEA. Miles proposes to excavate to Elevation 275 feet in the southernmost extent of the WEA. Prior to 2012, there was a lack of groundwater monitoring data points in this area. Monitoring of MW-15, located approximately 550 feet south of the southern WEA mining disturbance boundary (Figure 1), indicates that the highest water level recorded at MW-15 was Elevation 256.8 feet. Based on a uniform gradient between & ( E D E D E D E D @ A @ A @ A @ A @ A Shine Hub Weather Station MW-15 MW-8 MW-5 MW-9 Shine Hub Water Supply Well Wahl Lake Rd Thorndyke Rd U V 104 Thorndyke Rd S Point Rd Peabody Way Thorndyke Rd µ Vicinity Map Figure 1 Shine Facility - Wahl Extraction Area Miles Sand & Gravel Company Shine, Washington ! ^ Olympia § ¨ ¦ 90 § ¨ ¦ 5 § ¨ ¦ 405 £ ¤ 101 Olympic NP Washington 3,000 3,000 0 Feet Data Sources: ESRI Data & Maps, Street Maps 2005 Notes: 1. The locations of all features shown are approximate. 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 3. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without permission. Transverse Mercator, State Plane South, North American Datum 1983 North arrow oriented to grid north Office: TACOPath: P:\1\1355035\GIS\135503500_F1.mxdMap Revised: 20 March 2012 syi E D E D E D Station 1 Station 2 Station 3 200 200 0 Feet Station 1 Station 3Station 2 Station 4 Legend @ A Monitoring Well E D Stream Gage & ( Shine Hub Weather Station Wahl Extraction Area MW-5 Station 1 Thomdyke Creek Creek Groundwater Data Shine Facility -Wahl Extraction Area Jefferson County, Washington Figure 2 230 240 250 260 270 280 290 1/1/20051/1/20061/1/20071/1/20081/1/20091/1/20101/1/20111/1/20121/1/20131/1/20141/1/20151/1/20161/1/20171/1/2018 Water Level Elevation (Feet NGVD) Date Shine Hub Water-Supply Well Monitoring Well MW-5 Monitoring Well MW-8 Monitoring Well MW-9 Monitoring Well MW-15 Moved transducerfrom MW-5 to MW-15 on May 2, 2012 GeoEngineers,Inc. Data through 12/31/2017 Transducer temporarily removed from MW-9on November7, 2016because of excavation surrounding well. Surface Water Data Shine Facility -Wahl Extraction Area Jefferson County, Washington Figure 3 0.1 1 10 100 -1 0 1 2 Stream Flow (ft³/sec) Stage Height (feet) Date Station 1 Relative Stage Heights Waded Stream Flow Measurements GeoEngineers,Inc. Data through 12/31/2017Stage height below staff datum 0.01 0.1 1 10 100 -1 0 1 2 3 4 Stream Flow (ft³/sec) Stage Height (feet) Date Station 2 Relative Stage Heights Waded Stream Flow Measurements Relocated Station 2 approximately 300 feet upstream on February 15, 2011 Faulty Readings SensorReplaced February 3, 2012 Stage height below staff datum Transduer not functioning from January 13,2017 to June 8, 2017 GeoEngineers,Inc. Data through 12/31/2017 0.1 1 10 100 -1 1 3 5 7 Stream Flow (ft³/sec) Stage Height (feet) Date Station 4 Relative Stage Heights Waded Stream Flow Measurements Sensor Replaced on May 6, 2011 Transducer not functioning from April 16,2014 to June 27, 2014 GeoEngineers,Inc. Data through 12/31/2017 0.01 0.1 1 10 100 -1 0 1 2 3 Stream Flow (ft³/sec) Stage Height (feet) Date Station 3 Relative Stage Heights Waded Stream Flow Measurements Stream heightbelow staff datum Transducer and/or Stilling Well under repair from November 7, 2016 to June 8, 2017 Sensor Replaced May6, 2011 GeoEngineers,Inc. Data through 12/31/2017 Notes: 1.The stream channel at Station 1 bifurcated in early 2017, forming two channels that resulted in a gravel bar forming where the staff gage is located. 2.The stream channel at Station 2 shifted such that the staff gage was located outside the wetted channel in 2013, 2014 and 2017. Precipitation Data Shine Facility -Wahl Extraction Area Jefferson County, Washington Figure 4 Notes: 1.The computer that automatically downloads weather data at the Shine weather station was damaged in a power outage. The damage has affected precipitation data since 2012. Daily rainfall data was acquired from Kitsap Public Utilities District No. 1’s Edgewater Station gage, located approximately 5 miles to the southwest, for June 18, 2009 through December 31, 2017. 0 1 2 3 4 1/1/20051/1/20061/1/20071/1/20081/1/20091/1/20101/1/20111/1/20121/1/20131/1/20141/1/20151/1/20161/1/20171/1/2018 Daily Precipitation (inches) Date Shine Weather Station Kitsap PUD Edgewater Station ATTACHMENT 1 Wahl Reclamation Map 2015 Miles Shine Facility Quarterly Inspection.pdfMicrosoft Word - Miles Shine Facility Quarterly Inspection_2015.docx 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 April 7, 2016 Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, Washington 98368 Attention: David W. Johnson Subject: 2015 On-Site Inspection of Miles Sand & Gravel Company, Shine Facility Wahl Extraction Area, WDNR Permit No. 70-013024 Jefferson County, Washington File No. 1355-035-00 This letter presents the results of the quarterly on-site inspection of the Shine Facility operated by Miles Sand & Gravel Company (Miles). Conditions 7 and 9 of Jefferson County Ordinance 08-706-04, amended by Jefferson County Ordinance 09-1213-10, require the submittal of a quarterly inspection report regarding mining operations located within a designated Aquifer Recharge Area. The intent is for this letter to satisfy the requirements of Conditions 7 and 9 and to present the results of the quarterly inspections in 2015. GeoEngineers, Inc. (GeoEngineers) conducted a review of workings for 2015 at the Wahl Extraction Area (WEA) within the Shine Facility on a quarterly basis. The last site visit was on February 12, 2016 when Li Wang, a hydrogeologist with GeoEngineers, Ryan Ransavage, Environmental Specialist for Miles, and his coworker Brandon Hand conducted a tour of the operations. Mr. Ransavage showed the boundaries of the permitted excavation area. The boundaries of the permitted area are marked with PVC posts that extend 6 to 10 feet above ground. These posts were readily observed from a distance. The excavations, plant operations and mining activities were all occurring within the marked boundary. No reclamation was occurring within the WEA since the extraction process had commenced in April 2013. Stumps and overburden soils salvaged from excavated areas have been stockpiled on site for future reclamation. The Washington Department of Natural Resources Permit No. 70-013024 for the WEA was approved on May 2, 2012. The permitted area encompasses a total of 183 acres, which includes the following: ■ 156 acres in the mining area (137 acres will be disturbed during the mining process, 19 acres of setbacks, buffers and wetlands will remain “as-is”). ■ 9 acres for the utility and maintenance road easement. ■ 18 acres for the Operations and Processing Facility. Monitoring Period:01/01/2015 - 03/31/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-1 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-1 3-F 1/16/15 No 9-Th 2/26/15 No 11-F 3/13/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 2 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:01/01/2015 - 03/31/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-2 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-2 3-F 1/16/15 No 9-Th 2/26/15 No 11-F 3/13/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 2 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:01/01/2015 - 03/31/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-3 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-3 3-F 1/16/15 No 9-Th 2/26/15 No 11-F 3/13/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 2 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:01/01/2015 - 03/31/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-4 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-4 MP-4 3-F 1/16/15 8.01 No 9-Th 2/26/15 8.25 No 11-F 3/13/15 C No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 2 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Signature Date Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:04/01/2015 - 06/30/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-1 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-1 2-Th 4/9/15 No 7-F 5/15/15 No 12-T 6/16/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:04/01/2015 - 06/30/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-2 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-2 2-Th 4/9/15 No 7-F 5/15/15 No 12-T 6/16/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:04/01/2015 - 06/30/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-3 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-3 2-Th 4/9/15 No 7-F 5/15/15 No 12-T 6/16/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:04/01/2015 - 06/30/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-4 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-4 MP-4 2-Th 4/9/15 C No 7-F 5/15/15 C No 12-T 6/16/15 C No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 7/24/2015 7:39:33 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:07/01/2015 - 09/30/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-1 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-1 2-F 7/10/15 No 8-M 8/17/15 No 13-F 9/25/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:07/01/2015 - 09/30/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-2 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-2 2-F 7/10/15 No 8-M 8/17/15 No 13-F 9/25/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:07/01/2015 - 09/30/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-3 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-3 2-F 7/10/15 No 8-M 8/17/15 No 13-F 9/25/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:07/01/2015 - 09/30/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-4 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-4 MP-4 2-F 7/10/15 C No 8-M 8/17/15 C No 13-F 9/25/15 C No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 10/12/2015 10:58:34 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:10/01/2015 - 12/31/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-1 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-1 3-F 10/16/15 No 8-F 11/20/15 No 13-Th 12/24/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:10/01/2015 - 12/31/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-2 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-2 3-F 10/16/15 No 8-F 11/20/15 No 13-Th 12/24/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:10/01/2015 - 12/31/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-3 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-3 3-F 10/16/15 No 8-F 11/20/15 No 13-Th 12/24/15 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:10/01/2015 - 12/31/2015 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP-4 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP-4 MP-4 3-F 10/16/15 C No 8-F 11/20/15 C No 13-Th 12/24/15 7.55 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 1/27/2016 2:09:24 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 2016 Wahl Extraction Area Groundwater Monitoring Report.pdfMicrosoft Word - 2016 Wahl Extraction Area Groundwater Monitoring Report.docx 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 March 10, 2017 Miles Sand & Gravel Company 400 Valley Avenue NE Puyallup, Washington 98372 Attention: Mike Schuh Subject: Letter Report 2016 Groundwater, Surface Water and Precipitation Monitoring Data Shine Facility – Wahl Extraction Area Jefferson County, Washington File No. 1355-035-00 Monitoring requirements at the Shine Facility were set forth by Jefferson County Department of Community Development (DCD) as conditions of the Wahl Permit (MLA03-0037), dated July 18, 2005, prepared originally for Fred Hill Materials (FHM) and Ordinance 08-0706-04 (MLA10-00073), Amendment 09-1213-10 dated December 18, 2010. The purpose of this letter is to provide a summary of the water monitoring program implemented for the Wahl Extraction Area (WEA) as of the last data download event on January 13, 2017 and to compare the high groundwater table elevations with the proposed excavation elevations at the WEA. PREVIOUS AND CURRENT MONITORING The original monitoring, initiated in August 2005, was conducted by CR Hydrogeologic Consulting FHM. GeoEngineers, Inc. (GeoEngineers) assumed the monitoring duties in November 2009 when Miles Sand & Gravel Company (Miles) commenced leasing the operations at the WEA. The monitoring locations are shown on Figure 1. The following are elements of the current monitoring program: Groundwater ■ Groundwater level monitoring at the WEA began in August 2005 with the installation of an automated water-level sensor (consisting of a combined pressure transducer and datalogger) in monitoring well MW-9, a monitoring well located in the southwest portion of the WEA. The automated sensor measures and records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The monitoring equipment is still functioning and has provided reliable data. Miles Sand & Gravel Company | March 10, 2017 Page 2 File No. 1355-035-00 ■ A water-level sensor was installed in the Shine Hub water supply well in April 2007. The sensor malfunctioned in June 2010 and was replaced in September 2010 with new equipment from the same manufacturer. The sensor malfunctioned again in April 2013 and was repaired and reinstalled in July 2013. With the exception of a few months in 2010 and in 2013, the monitoring equipment has provided reliable data. ■ In January 2010, additional monitoring wells (MW-5 and MW-8) equipped with sensors were added by Miles to estimate a groundwater surface profile beneath the WEA. The installed sensors are from the same manufacturer as those installed in monitoring well MW-9 and the Shine Hub well. The current monitoring equipment provides reliable data. ■ In 2012, monitoring well MW-5 was deepened to explore for a groundwater supply for the facility. The exploration was unsuccessful and MW-5 was decommissioned. Thus, the water level sensor from MW-5 was moved to monitoring well MW-15 on February 15, 2012. MW-15 is located approximately 550 feet south of the proposed mining area and now provides a monitoring point for the southern portion of the WEA. ■ In July 2015, the vented transducer in MW-8 stopped functioning and was replaced on October 2015 with a new non-vented transducer (INW PT2X 50-psi). ■ By late 2016, excavation had progressed to the area surrounding monitoring well MW-9 and the wellhead was nearly inaccessible. Therefore, the transducer in MW-9 was removed on November 7, 2016. The MW-9 casing will be modified and the transducer will be reinstalled in MW-9 after the excavation surrounding MW-9 is completed Surface Water ■ Three surface water stations were established in September 2005 on Thorndyke Creek near the WEA. One of the stations (Station 3) is located on an unnamed tributary and two are located on Thorndyke Creek, with Station 2 upstream and Station 1 located downstream of the confluence with the unnamed tributary. The stream stage height at each station is recorded on an hourly basis using an automated sensor. The streamflow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ An additional surface water monitoring point (Station 4) is located on Thorndyke Creek approximately 1 mile upstream of its mouth. The stream stage height is recorded on an hourly basis using an automated sensor. The stream flow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. The sensor installed at Station 4 malfunctioned in April 2014 and was repaired and reinstalled in June 2014. ■ The automated equipment previously installed at the surface water stations was replaced at all four stations in 2011 and 2012 with more reliable sensors. Precipitation ■ A weather station was established on the roof of the office building at the current Shine Hub in September 2005. The data, collected on an hourly basis, includes precipitation, temperature and wind direction and speed. Between March 14 and October 17, 2012, the weather station experienced a loss of data. Periodic data losses from September 1, 2013 through December 31, 2016 have occurred as a result of damage caused by power outages at the site. Therefore, the data for 2013 through 2016 is Miles Sand & Gravel Company | March 10, 2017 Page 3 File No. 1355-035-00 incomplete. A comparable dataset was acquired for January 1, 2012 through December 31, 2016 from the Kitsap Public Utility District No. 1’s (KPUD) rain gage at Edgewater, located on the Kitsap Peninsula approximately 5 miles southeast of the WEA. MONITORING DATA SUMMARY The latest set of monitoring data was collected at the WEA on January 13, 2017. GeoEngineers has developed plots of the monitoring data described below. Mining has commenced in the WEA and several years of background groundwater, surface water and precipitation data have now been acquired. Groundwater Data The elevations of the groundwater monitoring points (rims of the well casings) have been surveyed relative to the National Geodetic Vertical Datum (NGVD) 1929 datum. The water levels measured in each monitoring well have been converted to groundwater elevations. Figure 2 shows a plot of groundwater elevations from the four monitoring wells and the Shine Hub water supply well. The water supply well is located near the office buildings at the Shine Facility (Figure 1). Monitoring wells MW-5, MW-8 and MW-9 are located within the WEA; monitoring well MW-15 is located approximately 550 feet south of the WEA. Shine Hub Water Supply Well The hourly data from the Shine Hub water supply well are shown on Figure 2 as points because the well pump cycles on and off several times a day. The lowest water level elevations in the Shine Hub water supply well represent pumping water levels and the highest represent fully or nearly recovered water levels. The data in-between represent water levels that are either recovering or are being drawn down at various stages of the pumping cycle. The highest levels show a pattern similar to the other monitoring wells described below that are located over a mile west of the Shine Hub well. Monitoring Wells MW-5, MW-8, MW-9 and MW-15 The dataset with the longest period of record is for monitoring well MW-9, beginning in August 11, 2005. The groundwater elevations in all the wells show similar seasonal fluctuations of rising levels in the winter wet months and declining levels between spring and fall. The highest recorded groundwater elevations for the monitoring wells were all recorded in April 2016. These groundwater elevations were 280.5, 281.5 and 255.85 feet (NGVD 29) for MW-8, MW-9, and MW-15, respectively. These groundwater elevations are 2 to 3 feet higher than the previous highs seen in 2013. Surface Water Data Figure 3 shows a plot of the surface water data for Stations 1 through 4, located on Thorndyke Creek. Figure 3 shows the stage heights as recorded at a 30-minute interval using dataloggers. The stage height dataset had relatively short periods in 2010 and 2011 when the data was lost due to faulty monitoring sensors. The equipment was replaced for all four stations in early 2012 with more reliable sensors and the stage heights have been recorded at hourly intervals since installing the replacement sensors. Figure 3 also shows the streamflow rates calculated from flow velocities that were measured by wading the stream; these are plotted on a logarithmic vertical scale (right-hand axis). In 2016, the measured flow at Miles Sand & Gravel Company | March 10, 2017 Page 4 File No. 1355-035-00 Station 1, located near the WEA, ranged between 0.87 and 5.69 cfs. The stream channel at Station 1 bifurcated in early 2017, forming two channels that resulted in a gravel bar that formed where the staff gage is located. Thus, recorded staff gage readings are below the gage. We could not communicate with the transducer installed at Station 3. The transducer was removed and sent for repair. The data that remains on the transducer will be downloaded and included in future reports. The transducer will be reinstalled in April 2017. Precipitation Data Figure 4 shows a plot of the daily precipitation at the weather station located on the roof of the Shine Hub office. The highest recorded daily precipitation event was 3.11 inches on December 3, 2007. As stated above, it appears from the downloaded data that the station has had periods of malfunction in 2012 and has recorded only partial data since September 2013. This is evident in the plot for 2012 through 2016. The Shine weather station data for 2012 through 2016 shown on Figure 4 is supplemented by data from the KPUD’s Edgewater rain gage as a substitute until the Shine weather station is repaired. Comparing days when both stations recorded data it appears that there has been significantly more rainfall at the Edgewater gage than recorded at the Shine weather station. GROUNDWATER ELEVATIONS VERSUS PROPOSED EXCAVATION FLOOR The proposed excavation elevations are shown on the attached plan titled “WDNR Permit No. 70-013024 Final Reclamation Map” as prepared by Team 4 Engineering. The plan shows that the excavation will stay 10 feet above the high groundwater table, as a currently required condition, in the central and north portions of the WEA. Miles proposes to excavate to Elevation 275 feet in the southernmost extent of the WEA. Prior to 2012, there was a lack of groundwater monitoring data points in this area. Monitoring of MW-15, located approximately 550 feet south of the southern WEA mining disturbance boundary (Figure 1), indicates that the highest water level recorded at MW-15 was Elevation 255.85 feet. Based on a uniform gradient between MW-9 and MW-15, the high groundwater elevation would be approximately Elevation 262 feet at the southern mining disturbance boundary as shown on the Reclamation Map (Attachment 1). Thus, the proposed excavation elevation of Elevation 275 feet will be greater than 10 feet above the highest groundwater table based on available data. CONCLUSIONS Monitoring data for groundwater, surface water and precipitation at the WEA are being collected by GeoEngineers on an ongoing basis to develop an extensive background data set, as required under permit conditions and local ordinances. Data have been collected since 2005, and additional groundwater monitoring locations installed in 2009 have allowed the estimation of a groundwater elevation profile beneath the planned mining area. Based on the groundwater data collected to date, the gravel mine excavations proposed by Miles at the WEA are 10 feet or greater above the highest projected groundwater surface elevations. & ( E D E D E D E D @ A @ A @ A @ A @ A Shine Hub Weather Station MW-15 MW-8 MW-5 MW-9 Shine Hub Water Supply Well Wahl Lake Rd Thorndyke Rd U V 104 Thorndyke Rd S Point Rd Peabody Way Thorndyke Rd µ Vicinity Map Figure 1 Shine Facility - Wahl Extraction Area Miles Sand & Gravel Company Shine, Washington ! ^ Olympia § ¨ ¦ 90 § ¨ ¦ 5 § ¨ ¦ 405 £ ¤ 101 Olympic NP Washington 3,000 3,000 0 Feet Data Sources: ESRI Data & Maps, Street Maps 2005 Notes: 1. The locations of all features shown are approximate. 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 3. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without permission. Transverse Mercator, State Plane South, North American Datum 1983 North arrow oriented to grid north Office: TACOPath: P:\1\1355035\GIS\135503500_F1.mxdMap Revised: 20 March 2012 syi E D E D E D Station 1 Station 2 Station 3 200 200 0 Feet Station 1 Station 3Station 2 Station 4 Legend @ A Monitoring Well E D Stream Gage & ( Shine Hub Weather Station Wahl Extraction Area MW-5 Station 1 Thomdyke Creek Creek Groundwater Data Shine Facility-Wahl Extraction Area Jefferson County, Washington Figure 2 SP:\1\1355035\00\finals\Shine Facility –2016 Annual Report_Figures2 through 4.pptx JWP 01/23/2017 Notes: 1.Excavation is occurring near Monitoring Well 9. The transducer in Monitoring Well 9 was temporarily removed. Monitoring Well 9 will be modified and the transducer will be reinstalled once excavation surrounding the well is completed. Surface Water Data Shine Facility-Wahl Extraction Area Jefferson County, Washington Figure 3 SP:\1\1355035\00\finals\Shine Facility –2016 Annual Report_Figures2 through 4.pptx JWP 01/23/2017 1/1/041/1/051/1/061/1/071/1/081/1/091/1/101/1/111/1/121/1/131/1/141/1/151/1/161/1/17 Date 0 1 2 3 4 0.1 1 10 100 1000 Station 2 Relative Stage Heights Waded Stream Flow Measurements Relocated Station 2 approximately 300 feet upstream on 2/15/2011 Faulty Readings Sensor Replaced 2/3/12 Stage Height (feet) Stream Flow (Cubic Feet Per Second) Stage Height (feet) Stream Flow (Cubic Feet Per Second) 1/1/051/1/061/1/071/1/081/1/091/1/101/1/111/1/121/1/131/1/141/1/151/1/161/1/17 Date 0 2 4 6 8 0.1 1 10 100 1000 Station 4 Relative Stage Heights Waded Stream Flow Measurements Sensor Replaced 5/6/11 Notes: 1.The stream channel at Station 1 bifurcated in early 2017, forming two channels that resulted in a gravel bar forming where the staff gage is located. 2.The stream channel at Station 2 shifted such that the staff gage was located outside the wetted channel in 2013, 2014 and 2017. Precipitation Data Shine HubWeather Station Shine Facility-Wahl Extraction Area Jefferson County, Washington Figure 4 Daily Precipitation (inches) Notes: 1.The computer that automatically downloads weather data at the Shine weather station was damaged in a power outage. The damage has affected precipitation data since 2012. Daily rainfall data was acquired from Kitsap Public Utilities District No. 1’s Edgewater Station gage, located approximately 5 miles to the southwest, for January 1, 2012 through December 31, 2017. SP:\1\1355035\00\finals\Shine Facility –2016 Annual Report_Figures2 through 4.pptx JWP 01/23/2017 ATTACHMENT 1 Wahl Reclamation Map 2013 Q3 Miles Shine Facility Conditions 7 9_Quarterly Inspection Report.pdfMiles Sand and Gravel Co 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 November 7, 2013 Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, Washington 98368 Attention: David Wayne Johnson Subject: Quarterly On-Site Inspection of Miles Sand & Gravel Company, Shine Facility Wahl Extraction Area, WDNR Permit No. 70-013024 Jefferson County, Washington File No. 1355-035-00 This letter presents the results of the quarterly on-site inspection of Shine facilities operated by Miles Sand & Gravel Company (Miles). Conditions 7 and 9 of Jefferson County Ordinance 08-706-04, amended by Jefferson County Ordinance 09-1213-10, requires the submittal of a quarterly inspection report regarding mining operations located within a designated Aquifer Recharge Area. The intent is for this letter to satisfy the requirements of Conditions 7 and 9 and to represent the quarterly inspection report for the third quarter of 2013. On November 5, 2013, Joel Purdy, a pre-approved independent consultant with GeoEngineers, inspected the Wahl Extraction Area (WEA) within the Shine facilities. Lars Ejde, Facilities Manager for Miles, provided a tour of the operations. Mr. Ejde showed the boundaries of the permitted excavation area. The boundaries of the permitted area are marked with PVC posts that extend 6 to 10 feet above ground. These posts were readily observed from a distance. The excavations, plant operations, and mining activities were all occurring within the marked boundary. No reclamation was occurring within the WEA since the extraction process had recently commenced in April 2013. Stumps and overburden soils salvaged from excavated areas have been stockpiled on site for future reclamation. The Washington Department of Natural Resources Permit No. 70-013024 for the WEA was approved on May 2, 2012. The permitted area encompasses a total of 183 acres, which includes the following: ■ 156 acres in the mining area (137 acres will be disturbed during the mining process, 19 acres of setbacks, buffers and wetlands will remain “as-is”). ■ 9 acres for the utility and maintenance road easement. ■ 18 acres for the Operations and Processing Facility. Jefferson County Department of Community Development | November 7, 2013 Page 2 File No. 1355-035-00 The following is a summary of observations made during the quarterly visit: ■ Boundaries of the permitted areas were clearly marked. ■ No mining activities were occurring outside of the permitted areas. ■ The stormwater pond, the location of a water quality monitoring point, was absence of sheen. A copy of the Discharge Monitoring Report Miles submitted to the Dept. of Ecology is attached. ■ No reclamation has occurred at the WEA. Please contact us if you have any questions concerning this quarterly report. Sincerely, GeoEngineers, Inc. Joel W. Purdy, LG, LHG Senior Hydrogeologist Michael A.P. Kenrick, PE, LHG Senior Principal JWP:MAPK:lc Copyright© 2013 by GeoEngineers, Inc. All rights reserved. Attachments: Miles Discharge Monitoring Report Shine Facility Map cc: Mike Schuh Miles Sand & Gravel Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. ATTACHMENTS Monitoring Period:07/01/2013 - 09/30/2013 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP1 - Storm to Ground - Exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP 3 MP1 MP1 4-T 7/23/13 No C No 9-M 8/26/13 No C No 13-T 9/24/13 No C No Total 0 <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 2 Monitoring Period:07/01/2013 - 09/30/2013 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP2 - Process to Ground - exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP2 4-T 7/23/13 No 9-M 8/26/13 No 13-T 9/24/13 No Total 0 <= 0 Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 10/14/2013 10:52:55 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 2 2013 Q2 Miles Shine Facility Conditions 7 9 Quarterly Inspection Report.pdfMiles Sand and Gravel Co 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 July 29, 2013 Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, Washington 98368 Attention: David Wayne Johnson Subject: Quarterly On-Site Inspection of Miles Sand & Gravel Company, Shine Facility Wahl Extraction Area, WDNR Permit No. 70-013024 Jefferson County, Washington File No. 1355-035-00 This letter presents the results of the quarterly on-site inspection of Shine facilities operated by Miles Sand & Gravel Company (Miles). Conditions 7 and 9 of Jefferson County Ordinance 08-706-04, amended by Jefferson County Ordinance 09-1213-10, requires the submittal of a quarterly inspection report regarding mining operations located within a designated Aquifer Recharge Area. The intent is for this letter to satisfy the requirements of Conditions 7 and 9 and to represent the first quarterly inspection report. On July 2, 2013, Joel Purdy, a pre-approved independent consultant with GeoEngineers, inspected the Wahl Extraction Area (WEA) within the Shine facilities. Lars Ejde, Facilities Manager for Miles, provided a tour of the operations. Mr. Ejde showed the boundaries of the permitted excavation area. The boundaries of the permitted area are marked with PVC posts that extend 6 to 10 feet above ground. These posts were readily observed from a distance. The excavations, plant operations, and mining activities were all occurring within the marked boundary. No reclamation was occurring within the WEA since the extraction process had recently commenced in April 2013. The Washington Department of Natural Resources permit No. 70-013024 for the WEA was approved on May 2, 2012. The permitted area encompasses a total of 183 acres which includes the following: ■ 156 acres in the mining area (137 acres will be disturbed during the mining process, 19 acres of setbacks, buffers and wetlands will remain “as-is”). ■ 9 acres for the utility and maintenance road easement. ■ 18 acres for the Operations and Processing Facility. Jefferson County Department of Community Development | July 29, 2013 Page 2 File No. 1355-035-00 The following is a summary of observations made during the quarterly visit: ■ Boundaries of the permitted areas were clearly marked. ■ No mining activities were occurring outside of the permitted areas. ■ The stormwater pond, the location of a water quality monitoring point, was absence of sheen. A copy of the DMR Miles submitted to the Dept. of Ecology is attached. ■ No reclamation has occurred at the WEA. Please contact us if you have any questions concerning this quarterly report. Sincerely, GeoEngineers, Inc. Joel W. Purdy, LG, LHG Senior Hydrogeologist Michael A.P. Kenrick, PE, LG, LHG Senior Principal JWP:MAPK:lc Copyright© 2013 by GeoEngineers, Inc. All rights reserved. Attachment: Miles Discharge Monitoring Report cc: Mike Schuh Miles Sand & Gravel Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. Monitoring Period:04/01/2013 - 06/30/2013 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP1 - Storm to Ground - Exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP1 MP1 3-T 4/16/13 8.38 No 8-M 5/20/13 C No 11-W 6/12/13 C No Total <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 2 Monitoring Period:04/01/2013 - 06/30/2013 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP2 - Process to Ground - exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP2 3-T 4/16/13 No Total No <= 0 Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 6/28/2013 3:48:45 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 2 2020 Wahl Extraction Area Groundwater Monitoring Report.pdfMicrosoft Word - 2020 Wahl Extraction Area Groundwater Monitoring Report.docx 17425 NE Union Hill Road, Suite 250 Redmond, Washington 98052 425.861.6000 May 6, 2021 Miles Sand & Gravel Company 400 Valley Avenue NE Puyallup, Washington 98372 Attention: Ryan Ransavage Subject: Letter Report 2020 Groundwater, Surface Water and Precipitation Monitoring Data Shine Facility – Wahl Extraction Area Jefferson County, Washington File No. 1355-035-06 Monitoring requirements at the Shine Facility were set forth by Jefferson County Department of Community Development (DCD) as conditions of the Wahl Permit (MLA03-0037), dated July 18, 2005, prepared originally for Fred Hill Materials (FHM) and Ordinance 08-0706-04 (MLA10-00073), Amendment 09-1213-10 dated December 18, 2010. The purpose of this letter is to provide a summary of the groundwater and surface water monitoring program implemented for the Wahl Extraction Area (WEA) through December 31, 2020 and to compare the high groundwater table elevations with the proposed excavation elevations at the WEA. PREVIOUS AND CURRENT MONITORING The original monitoring, initiated in August 2005, was conducted by CR Hydrogeologic Consulting FHM. GeoEngineers, Inc. (GeoEngineers) assumed the monitoring duties in November 2009 when Miles Sand & Gravel Company (Miles) commenced leasing the operations at the WEA. The current monitoring program includes groundwater, surface water, and precipitation data acquisition. The monitoring locations are shown on Figure 1. Groundwater and surface water data are presented on Figures 2 and 3, respectively. Precipitation data are shown on Figure 4. The following are elements of the current monitoring program: Groundwater ■ Groundwater level monitoring at the WEA began in August 2005 with the installation of an automated water-level sensor (consisting of a combined pressure transducer and datalogger) in monitoring well MW-9, a monitoring well located in the southwest portion of the WEA (Figure 1). The transducer measures and records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The transducer provided reliable data from August 2005 through November 2016. Miles Sand & Gravel Company | May 6, 2021 Page 2 File No. 1355-035-06 ■ By late 2016, excavation had progressed to the area surrounding monitoring well MW-9 and the wellhead was nearly inaccessible. The transducer in monitoring well MW-9 was removed on November 7, 2016. Monitoring well MW-9 was not accessible between November 2016 and the end of 2020. The casing for monitoring well MW-9 will be modified, and the transducer will be reinstalled after excavation and reclamation activities are complete in the area surrounding monitoring well MW-9. ■ A transducer was installed in the Shine Hub water supply well (Figure 1) in April 2007. The transducer malfunctioned in June 2010 and was replaced in September 2010 with new equipment from the same manufacturer. The transducer malfunctioned again in April 2013 and was repaired and reinstalled in July 2013. The transducer also temporarily stopped recording between March and May 2018 and again beginning in September 2020. The Shine Hub water supply well transducer is currently being repaired and will be reinstalled in early 2021. With the exception of a few months in 2010, 2013, 2018 and 2020 the monitoring equipment has provided reliable data. ■ In January 2010, Miles installed additional transducers in monitoring wells MW-5 and MW-8 (Figure 1) to estimate a groundwater surface profile beneath the WEA. The installed transducers were from the same manufacturer as those installed in monitoring well MW-9 and the Shine Hub water supply well. The monitoring equipment installed in monitoring well MW-5 provided reliable data through April 2012. The monitoring equipment installed in monitoring well MW-8 provided reliable data through mid-March 2018. ■ In 2012, monitoring well MW-5 was deepened to explore for a groundwater supply for the facility. The exploration was unsuccessful, and MW-5 was decommissioned. Thus, the transducer from MW-5 was moved to monitoring well MW-15 (Figure 1) on May 2, 2012. Monitoring well MW-15 is located approximately 550 feet south of the proposed mining area and provides a monitoring point for the southern portion of the WEA. ■ The vented transducer in MW-8 was replaced in October 2015 with a new non-vented transducer (INW PT2X 50-psi). ■ By early 2018, excavation had progressed to the area surrounding monitoring well MW-8 and the wellhead was nearly inaccessible. The transducer in monitoring well MW-8 was removed on March 16, 2018. Monitoring well MW-8 was not accessible between March 2018 and the end of 2020. The casing for monitoring well MW-8 will be modified, and the transducer will be reinstalled after excavation and reclamation activities are complete in the area surrounding monitoring well MW-8. ■ The transducer removed from monitoring well MW-8 was installed in monitoring well MW-16, located approximately 1,430 feet northeast of monitoring well MW-8 (Figure 1). The transducer malfunctioned and was deemed inoperable; thus, a new non-vented transducer from the same manufacturer (INW LevelScout 30-psi) was installed on September 21, 2018. No survey elevation is available for the wellhead at monitoring well MW-16; thus, groundwater elevations have not been established at this monitoring location. We will continue to measure water levels at MW-16. Once the wellhead is surveyed, measured groundwater levels will be converted to elevations and plotted on Figure 2. Surface Water ■ Three surface water stations (Stations 1 through 3) were established in September 2005 on Thorndyke Creek near the WEA (Figure 1). One of the stations (Station 3) is located on an unnamed tributary and two are located on Thorndyke Creek, with Station 2 upstream and Station 1 located downstream of the confluence with the unnamed tributary. The stream stage height at each station is recorded on an Miles Sand & Gravel Company | May 6, 2021 Page 3 File No. 1355-035-06 hourly basis using an automated water-level sensor. The streamflow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ An additional surface water monitoring point (Station 4) is located on Thorndyke Creek approximately 1 mile upstream of its mouth (Figure 1). The stream stage height is recorded on an hourly basis using an automated water-level sensor. Stream flow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ The automated equipment previously installed at the surface water stations was replaced at all four stations in 2011 and 2012 with more reliable sensors. The sensor installed at Station 4 malfunctioned in April 2014 and was repaired and reinstalled in June 2014. ■ The stream channel at Station 1 experienced significant channel migration beginning in early 2016. A large precipitation event in January 2016 moved the channel westward and away from the staff gage, leaving the staff gage out of the channel. The stream occupied this relocated channel through 2017 and 2018; thus, staff gage readings at Station 1 are not representative of actual surface water levels starting in January 2016. ■ In spring 2017, the stream channel at Station 3 bifurcated, and the staff gage was positioned at the edge of a center bar of the stream. Throughout most of 2018 through 2020, the staff gage was several feet west of the wetted channel; thus, staff gage readings at Station 3 are not representative of actual surface water levels starting in spring 2017. ■ The stream channel and staff gage at Station 2 were affected by a small log jam sometime between the winter and spring 2017 monitoring events. The logs damaged the staff gage tape and caused a slight tilt to the staff gage. The logs were removed during the spring monitoring event to prevent further damage to the staff gage and the gage tape was replaced. ■ The stream channel at Station 4 bifurcated in early 2017, resulting in the formation of a gravel bar in the middle of the stream and deepening of the channel at the staff gage location. The condition of the staff gage was checked during each of the subsequent monitoring events. No modifications to the gage have been needed. ■ In January 2017, communication could not be established with the transducer installed at Station 3. The transducer was removed, sent in for repair, and reinstalled in June 2017. ■ In May 2017, the transducer at Station 2 malfunctioned and was removed, sent in for repair, and reinstalled in June 2017 but was subsequently moved to Station 1 by Miles and the Station 2 transducer replaced with a new transducer in July 2017. ■ In October 2017, the transducer at Station 1 malfunctioned and was removed and sent in for repair. It was reinstalled in November 2017. ■ New staff gage tapes were installed at Station 1, Station 2, and Station 4 in July 2017. ■ Miles installed new non-vented transducers (INW LevelScout 30-psi) at all four stations on September 21, 2018. ■ The stream channel and staff gage at Station 2 were affected by a fallen tree sometime in December 2020. The root ball of the tree fell into the stream about 10 feet upstream of the gage station and the tree canopy fell over the gage station and stream wading transect. The condition of this monitoring location will be evaluated and will be either reclaimed or relocated upstream of the current station location during one of the planned monitoring events in 2021. Miles Sand & Gravel Company | May 6, 2021 Page 4 File No. 1355-035-06 Precipitation ■ A weather station was established on the roof of the office building at the current Shine Hub in September 2005. The data, collected on an hourly basis, includes precipitation, temperature, and wind direction and speed. Between March 14 and October 17, 2012, the weather station experienced a loss of data. Periodic data losses from September 1, 2013 through December 31, 2016 have occurred as a result of damage caused by power outages at the site. Therefore, the data for 2013 through 2016 is incomplete. A comparable dataset was acquired for January 1, 2012 through December 31, 2020 from the Kitsap Public Utility District No. 1’s (KPUD) rain gage at Edgewater, located on the Kitsap Peninsula, approximately 5 miles southeast of the WEA. MONITORING DATA SUMMARY GeoEngineers has developed plots of the monitoring data described below. Mining has commenced in the WEA and several years of background groundwater, surface water and precipitation data have now been acquired. Groundwater Data The elevations of groundwater monitoring points (rims of the well casings) MW-5, MW-8, MW-9, MW-15, and the Shine Hub water supply well have been surveyed relative to the National Geodetic Vertical Datum (NGVD) 1929 datum. The water levels measured in each monitoring well have been converted to groundwater elevations using the surveyed monitoring point elevations. The elevation of groundwater monitoring point MW-16 has not been surveyed; thus, groundwater elevations have not been established at this location. A plot of groundwater elevations from monitoring wells MW-5, MW-8, MW-9, MW-15, and the Shine Hub water supply well is presented on Figure 2. The water supply well is located near the office buildings at the Shine Facility (Figure 1). Monitoring wells MW-5, MW-8, MW-9, and MW-16 are located within the WEA; monitoring well MW-15 is located approximately 550 feet south of the WEA (Figure 1). Shine Hub Water Supply Well The hourly data from the Shine Hub water supply well are shown on Figure 2 as points because the well pump cycles on and off several times a day. The lowest water level elevations in the Shine Hub water supply well represent pumping water levels and the highest represent fully or nearly recovered (i.e., static) water levels. The data in-between represent water levels that are either recovering or are being drawn down at various stages of the pumping cycle. Seasonal water level fluctuations in the Shine Hub water supply well are similar to the other site monitoring wells (described below), located over a mile west of the Shine Hub well, and are attributed to seasonal fluctuations in precipitation. Groundwater elevations observed at the Shine Hub water supply well showed relatively sharp increases in early 2016 and early 2017 (Figure 2). Groundwater elevations remained elevated through 2020 relative to pre-2016 groundwater elevations. A similar pattern was also observed in monitoring wells MW-8 and MW-15. This overall rise in groundwater elevations is likely the result of recharge from increased precipitation between 2016 and 2017 (Figure 4). The effects of increased annual precipitation and large individual Miles Sand & Gravel Company | May 6, 2021 Page 5 File No. 1355-035-06 precipitation events are also shown in the surface water monitoring records (Figure 3). Groundwater elevations at the Shine Hub water supply well peaked in early 2018 and appear to be returning to pre-2016 water level elevations, which is likely the result of decreased precipitation between 2018 and 2020 compared to total rainfall in 2016 and 2017. Monitoring Wells MW-8, MW-9, MW-15, and MW-16 The groundwater elevations in all the monitoring wells show similar seasonal fluctuations of rising levels in the wet winter months and declining levels between spring and fall. The highest recorded groundwater elevation for monitoring well MW-8 was 282.2 feet (NGVD 29) recorded in May 2017. Monitoring at well MW-8 was discontinued in March 2018 because excavation surrounding the well rendered the wellhead inaccessible. The dataset with the longest period of record is for monitoring well MW-9, beginning in August 2005 through November 2016. The highest recorded groundwater elevation for monitoring well MW-9 was 281.5 recorded in April 2016. The highest recorded groundwater elevation for monitoring well MW-15 was 256.8 feet recorded in May 2017. No survey elevation is available for the wellhead at monitoring well MW-16; thus, groundwater elevations have not been established at this monitoring location. We will continue to measure water levels at MW-16. Once the wellhead is surveyed, measured groundwater levels will be converted to elevations and plotted on Figure 2. As discussed above, the observed trend of rising groundwater elevations starting in 2016 at MW-8 and MW-15 is likely attributed to increased precipitation during the winters of 2016 and 2017. Groundwater elevations at MW-15 appear to have peaked in early 2017 and appear to be returning to pre-2016 water level elevations, which is likely the result of decreased precipitation between 2018 and 2020 compared to total rainfall in 2016 and 2017. Surface Water Data Figure 3 shows a plot of the surface water data for Stations 1 through 4, located on Thorndyke Creek and one of its tributaries. Figure 3 shows the stage heights as recorded on a 1-hour interval using dataloggers. The stage height dataset has had relatively short periods when the data was lost due to faulty monitoring sensors. In each case, the equipment was repaired or replaced. Figure 3 also shows the streamflow rates calculated from flow velocities that were measured by wading the stream; these rates are plotted on a logarithmic vertical scale (right-hand axis). Station 1 The highest measured flow at Station 1, located near the WEA (Figure 1), in 2020 was 0.83 cubic feet per second (cfs) during the March monitoring event and the lowest measured flow was 0.62 cfs during the May monitoring event. The stream channel at Station 1 experienced significant channel migration beginning in early 2016. Figure 3 shows a drop in recorded water levels following a large precipitation event in January 2016, which moved the channel westward and away from the staff gage, leaving the staff gage out of the channel. The stream occupied this relocated channel from 2017 through 2020; thus, staff gage readings at Station 1 (Figure 3) are not representative of actual surface water levels starting in January 2016. Station 2 The highest measured flow at Station 2 (Figure 1) in 2020 was 0.26 cfs during the March monitoring event and the lowest measured flow was 0.19 cfs during the May monitoring event. The stream channel position at Station 2 has meandered somewhat since at least 2010. As shown on Figure 3, measured surface water Miles Sand & Gravel Company | May 6, 2021 Page 6 File No. 1355-035-06 levels drop below the staff gage datum at times during between 2010 and 2020 when the staff gage was near the bank or out of the channel. As described above, a tree fell into the stream sometime in December 2020. The root ball of the tree landed within the stream, blocking and rerouting the flow upstream of the staff gage and stilling well. The canopy of the fallen tree covered the stream flow measurement transect; thus, no stream flow data were collected during the December 2020 monitoring event. Station 3 The highest measured flow at Station 3 (Figure 1) in 2020 was 0.44 cfs during the March monitoring event and the lowest measured flow was 0.049 cfs during the December monitoring event. The stream channel at Station 3 migrated westward beginning in late 2016. In spring 2017, the stream channel bifurcated, and the staff gage was positioned at the edge of a center bar of the stream. Throughout most of 2018, 2019 and 2020, the staff gage was several feet west of the wetted channel; thus, staff gage readings at Station 3 (Figure 3) are not representative of actual surface water levels starting in spring 2017. Station 4 The highest measured flow at Station 4 (Figure 1) in 2020 was 2.7 cfs during the May monitoring event and the lowest measured flow was 0.46 cfs during the March monitoring event. The stream channel at Station 4 bifurcated in early 2017 resulting in the formation of a gravel bar in the center of the stream. Flow diverted around the gravel bar appears to be incising the channel at the location of the staff gage for Station 4. Significant channel migration was observed both upstream and downstream of Station 4 during the 2019 and 2020 monitoring events that may have resulted from multiple fallen trees impacting stream flow. Based on observations made during monitoring events conducted between 2017 and 2020, the channel at this location appears to be migrating westward. Precipitation Data Figure 4 shows a plot of the daily precipitation recorded at the weather station located on the roof of the Shine Hub office (2005 through 2016) and the KPUD’s Edgewater weather station (2009 through 2020). As stated above, it appears from the downloaded data that the Shine Hub weather station has had periods of malfunction and data loss since 2012. The weather station has not been collecting any precipitation data since early 2017. The Shine weather station data plotted for 2012 through 2020 (Figure 4) is supplemented by data from the KPUD Edgewater Station rain gage until the Shine weather station can be repaired. Comparing days when both stations recorded data, it appears that there has been significantly more rainfall at the Edgewater gage than recorded at the Shine weather station. The highest recorded daily precipitation event was 3.71 inches on January 21, 2016. The highest recorded daily precipitation event for 2020 was 2.67 inches on December 21, 2020. GROUNDWATER ELEVATIONS VERSUS PROPOSED EXCAVATION FLOOR The proposed excavation elevations are shown on the attached plan titled “WDNR Permit No. 70-013024 Final Reclamation Map” as prepared by Team 4 Engineering. The plan shows that the excavation will stay 10 feet above the high groundwater table, as a currently required condition, in the central and north portions of the WEA. Miles proposes to excavate to Elevation 275 feet in the southernmost extent of the WEA. Prior to 2012, there was a lack of groundwater monitoring data points in this area. Monitoring of MW-8, located within the Miles Sand & Gravel Company | May 6, 2021 Page 7 File No. 1355-035-06 WEA, and MW-15, located approximately 550 feet south of the southern WEA mining disturbance boundary (Figure 1), indicates that the highest water levels recorded at MW-8 and MW-15 were Elevation 282.2 feet and 256.8 feet, respectively, in May 2017. The highest groundwater elevation recorded at MW-15 in 2020 was Elevation 253.5 feet in March 2020, which is about 3.3 feet lower than the peak groundwater elevation recorded at the well. Based on a uniform gradient between MW-8 and MW-15, the highest groundwater elevation would be approximately Elevation 262 feet at the southern mining disturbance boundary (Attachment 1) based on historical peak groundwater elevations. Thus, the proposed excavation elevation of Elevation 275 feet will be greater than 10 feet above the highest groundwater table based on available data. CONCLUSIONS Monitoring data for groundwater, surface water, and precipitation at the WEA are being collected by GeoEngineers on an ongoing basis to develop an extensive background data set, as required under permit conditions and local ordinances. Data have been collected since 2005, and additional groundwater monitoring locations installed in 2009 have allowed the estimation of a historical groundwater elevation profile beneath the planned mining area. Based on the groundwater data collected to date and historical groundwater elevation trends, the gravel mine excavations proposed by Miles at the WEA will be 10 feet or greater above the highest projected groundwater surface elevations. RECOMMENDATIONS Based on the monitoring conducted in 2020, we have the following recommendations: ■ We recommend surveying the elevation of the wellhead at monitoring well MW-16 so groundwater levels can be translated to groundwater elevations. ■ We recommend repairing or replacing the on-site Shine weather station as soon as possible so that it records accurate precipitation data. ■ We recommend that the treefall at Station 2 be removed or that Station 2 be repositioned upstream to provide streamflow and stage measurements that are comparable to historical data. ■ We recommend that the stream channels be observed to evaluate whether the surface water gage stations need to be repositioned or deepened to monitor stream gage heights effectively. Miles Sand & Gravel Company | May 6, 2021 Page 8 File No. 1355-035-06 Please contact us if you have any questions about the water monitoring program. Sincerely, GeoEngineers, Inc. Eric N. Knoedler, LG Hydrogeologist Bridget A. August, LG, LHG 5/6/2021 Senior Hydrogeologist Galan W. McInelly, LG, LHG Principal ENK:BAA:GWM:tt Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. Attachments: Figure 1. Vicinity Map Figure 2. Groundwater Data Figure 3. Surface Water Data Figure 4. Precipitation Data Attachment 1. Wahl Reclamation Map Thorndyke Rd Peabody Way S Point Rd Thorndyke Rd 104 Wahl Lake Rd Thorndyke Rd Groves Way Dickey St Shine Hub WaterS upply Well MW-9 MW-5 MW-8 MW-15 MW-16 Shine Hub Weather Station Vicinity Map Figure 1 Shine Facility - Wahl Extraction Area Jefferson County, Washington Olympia 90 5 405 101 Olympic NP Washington 3,000 3,000 0 Feet Data Sources: ESRI Data & Maps, Street Maps 2005 Notes: 1. The locations of all features shown are approximate. 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 3. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without permission. Transverse Mercator, State Plane South, North American Datum 1983 North arrow oriented to grid north Office: TACOPath: P:\1\1355035\GIS\135503500_F1.mxdMap Revised: 16 March 2020 maugust Station 1 Station 2 Station 3 200 200 0 Feet Station 1 Station 3S tation 2 Station 4 Legend Monitoring Well Stream Gage Shine Hub Weather Station Wahl Extraction Area MW-5 Station 1 Thomdyke Creek Creek 1355-035-06 Date Exported: 02/05/2021 Figure 2 Groundwater Data Shine Facility – Wahl Extraction Area Jefferson County, Washington 1355-035-06 Date Exported: 02/05/2021 Figure 3 Surface Water Data Shine Facility – Wahl Extraction Area Jefferson County, Washington Staff Gage Datum Notes: 1. The stream channel at Station 1 bifurcated in Early 2017, forming two channels that resulted in a gravel bar forming where the staff gage is located. 2. The stream channel at Stations 1, 2, and 3 shifted such that the staff gage was located outside the wetted channel at various times; thus, the recorded staff gage readings are below the staff gage. 1355-035-06 Date Exported: 02/05/2021 Figure 4 Precipitation Data Shine Facility – Wahl Extraction Area Jefferson County, Washington Notes: 1. The computer that automatically downloads weather data at the Shine weather station was damaged in a power outage. The damage has affected precipitation data since 2012. Daily rainfall data was acquired from Kitsap Public utilities District No. 1’s Edgewater Station gage, located approximately 5 miles to the southwest, for June 18, 2009 through December 31, 2020. ATTACHMENT 1 Wahl Reclamation Map 2015 Wahl Extraction Area Groundwater Monitoring Report.pdfMicrosoft Word - Wahl Extraction Area Groundwater Monitoring Report 2015.docx 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 April 7, 2016 Miles Sand & Gravel Company 400 Valley Avenue NE Puyallup, Washington 98372 Attention: Mike Schuh Subject: Letter Report 2015 Groundwater, Surface Water and Precipitation Monitoring Data Shine Facility – Wahl Extraction Area Jefferson County, Washington File No. 1355-035-00 Monitoring requirements at the Shine Facility were set forth by Jefferson County Department of Community Development (DCD) as conditions of the Wahl Permit (MLA03-0037), dated July 18, 2005, prepared originally for Fred Hill Materials (FHM) and Ordinance 08-0706-04 (MLA10-00073), Amendment 09-1213-10 dated December 18, 2010. The purpose of this letter is to provide a summary of the water monitoring program implemented for the Wahl Extraction Area (WEA) as of the last data download event on February 16, 2016 and to compare the high groundwater table elevations with the proposed excavation elevations at the WEA. PREVIOUS AND CURRENT MONITORING The original monitoring, initiated in August 2005, was conducted by CR Hydrogeologic Consulting FHM. GeoEngineers, Inc. (GeoEngineers) assumed the monitoring duties in November 2009 when Miles Sand and Gravel Company (Miles) commenced leasing the operations at the WEA. The monitoring locations are shown on Figure 1. The following are elements of the current monitoring program: Groundwater ■ Groundwater level monitoring at the WEA began in August 2005 with the installation of an automated water-level sensor (consisting of a combined pressure transducer and datalogger) in MW-9, a monitoring well located in the southwest portion of the WEA. The automated sensor measures and records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The monitoring equipment is still functioning and has provided reliable data. Miles Sand & Gravel Company | April 7, 2016 Page 2 File No. 1355-035-00 ■ A water-level sensor was installed in the Shine Hub water supply well in April 2007. The sensor malfunctioned in June 2010 and was replaced in September 2010 with new equipment from the same manufacturer. The sensor malfunctioned again in April 2013 and was repaired and reinstalled in July 2013. With the exception of a few months in 2010 and in 2013, the monitoring equipment has provided reliable data. ■ In January 2010, additional monitoring wells (MW-5 and MW-8) equipped with sensors were added by Miles to estimate a groundwater surface profile beneath the WEA. The installed sensors are from the same manufacturer as those installed in MW-9 and the Shine Hub well. The current monitoring equipment provides reliable data. ■ In 2012, MW-5 was deepened to explore for a groundwater supply for the facility. The exploration was unsuccessful and MW-5 was decommissioned. Thus, the water level sensor from MW-5 was moved to MW-15 on February 15, 2012. MW-15 is located approximately 550 feet south of the proposed mining area and now provides a monitoring point for the southern portion of the WEA. ■ In July 2015, the vented transducer in MW-8 stopped functioning and was replaced on October 2015 with a new non-vented transducer (INW PT2X 50-psi). Surface Water ■ Three surface water stations were established in September 2005 on Thorndyke Creek near the WEA. One of the stations (Station 3) is located on an unnamed tributary and two are located on Thorndyke Creek, with Station 2 upstream and Station 1 located downstream of the confluence with the unnamed tributary. The stream stage height at each station is recorded on an hourly basis using an automated sensor. The streamflow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ An additional surface water monitoring point (Station 4) is located on Thorndyke Creek approximately 1 mile upstream of its mouth. The stream stage height is recorded on an hourly basis using an automated sensor. The stream flow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. The sensor installed at Station 4 malfunctioned in April 2014 and was repaired and reinstalled in June 2014. ■ The automated equipment previously installed at the surface water stations was replaced at all four stations in 2011 and 2012 with more reliable sensors. Precipitation ■ A weather station was established on the roof of the office building at the current Shine Hub in September 2005. The data, collected on an hourly basis, includes precipitation, temperature and wind direction and speed. Between March 14 and October 17, 2012, the weather station experienced a loss of data. Periodic data losses from September 1, 2013 through December 31, 2015 have occurred as a result of damage caused by power outages at the site. Therefore the data for 2013 through 2015 is incomplete. A comparable dataset was acquired for January 1, 2012 through December 31, 2015 from the Kitsap Public Utility District’s rain gage at Edgewater, located on the Kitsap Peninsula approximately 5 miles southeast of the WEA. Miles Sand & Gravel Company | April 7, 2016 Page 3 File No. 1355-035-00 MONITORING DATA SUMMARY The latest set of monitoring data was collected at the WEA on February 12, 2016. GeoEngineers has developed plots of the monitoring data described below. Mining has commenced in the WEA and several years of background groundwater, surface water and precipitation data have now been acquired. Groundwater Data The elevations of the groundwater monitoring points (rims of the well casings) have been surveyed relative to the National Geodetic Vertical Datum (NGVD) 1929 datum. The water levels measured in each monitoring well have been converted to groundwater elevations. Figure 2 shows a plot of groundwater elevations from the four monitoring wells and the Shine Hub water supply well. The water supply well is located near the office buildings at the Shine Facility (Figure 1). Monitoring wells MW-5, MW-8 and MW-9 are located within the WEA; monitoring wells MW-15 is located approximately 550 feet south of the WEA. Shine Hub Water Supply Well The hourly data from the Shine Hub water supply well are shown on Figure 2 as points because the well pump cycles on and off several times a day. The lowest water level elevations in the Shine Hub water supply well represent pumping water levels and the highest represent fully or nearly recovered water levels. The data in-between represent water levels that are either recovering or are being drawn down at various stages of the pumping cycle. The highest levels show a pattern similar to the other monitoring wells described below that are located over a mile west of the Shine Hub well. Monitoring Wells MW-5, MW-8, MW-9 and MW-15 The dataset with the longest period of record is for monitoring well MW-9, beginning in August 11, 2005. The groundwater elevations in all the wells show similar seasonal fluctuations of rising levels in the winter wet months and declining levels between spring and fall. During the winter of 2008-09, there was below-normal precipitation that was indicated by a decline in water levels from between early 2008 and late 2009. The highest recorded groundwater elevation of 282.50 feet (NGVD 29) for MW-5 was recorded in 2011. The highest recorded groundwater elevations for other observation wells were all recorded in 2013. These groundwater elevations were 278.38, 279.48 and 254.71 feet (NGVD 29) for MW-8, MW-9, and MW-15, respectively. Surface Water Data Figure 3 shows a plot of the surface water data for Stations 1 through 4, located on Thorndyke Creek. Figure 3 shows the stage heights as recorded at a 30-minute interval using dataloggers. The stage height dataset had relatively short periods in 2010 and 2011 when the data was lost due to faulty monitoring sensors. The equipment was replaced for all four stations in early 2012 with more reliable sensors and the stage heights have been recorded at hourly intervals since installing the replacement sensors. Figure 3 also shows the streamflow rates calculated from flow velocities that were measured by wading the stream; these are plotted on a logarithmic vertical scale (right-hand axis). The highest recorded flow at Station 1, located near the mouth of Thorndyke Creek, was 56.27 cubic feet per second on January 4, 2008. Miles Sand & Gravel Company | April 7, 2016 Page 4 File No. 1355-035-00 Precipitation Data Figure 4 shows a plot of the daily precipitation at the weather station located on the roof of the Shine Hub office. The highest recorded daily precipitation event was 3.11 inches on December 3, 2007. As stated above, it appears from the downloaded data that the station has had periods of malfunction in 2012 and has recorded only partial data since September 2013. This is evident in the plot for 2012 through 2015. The Shine weather station data for 2012 through 2015 shown on Figure 4 is supplemented by data from the Kitsap Public Utility District’s Edgewater rain gage as a substitute until the Shine weather station is repaired. Comparing days when both stations recorded data it appears that there has been generally more rainfall at the Edgewater gage than at the Shine weather station. GROUNDWATER ELEVATIONS VERSUS PROPOSED EXCAVATION FLOOR The proposed excavation elevations are shown on the attached plan titled “WDNR Permit No. 70-013024 Final Reclamation Map” as prepared by Team 4 Engineering. The plan shows that the excavation will stay 10 feet above the high groundwater table, as a currently required condition, in the central and north portions of the WEA. Miles proposes to excavate to Elevation 275 feet in the southernmost extent of the WEA. Prior to 2012, there was a lack of groundwater monitoring data points in this area. Monitoring of MW-15, located approximately 550 feet south of the southern WEA mining disturbance boundary (Figure 1), indicates that the highest water level recorded at MW-15 was Elevation 254.71 feet. Based on a uniform gradient between MW-9 and MW-15, the high groundwater elevation would be approximately Elevation 261 feet at the southern mining disturbance boundary as shown on the Reclamation Map (Attachment 1). Thus, the proposed excavation elevation of Elevation 275 feet will be greater than 10 feet above the highest groundwater table based on available data. CONCLUSIONS Monitoring data for groundwater, surface water and precipitation at the WEA are being collected by GeoEngineers on an ongoing basis to develop an extensive background data set, as required under permit conditions and local ordinances. Data have been collected since 2005, and additional groundwater monitoring locations installed in 2009 have allowed the estimation of a groundwater elevation profile beneath the planned mining area. Based on the groundwater data collected to date, the gravel mine excavations proposed by Miles at the WEA are 10 feet or greater above the highest projected groundwater surface elevations. We recommend repairing the on-site weather station as soon as possible so that it records accurate precipitation data. & ( E D E D E D E D @ A @ A @ A @ A @ A Shine Hub Weather Station MW-15 MW-8 MW-5 MW-9 Shine Hub Water Supply Well Wahl Lake Rd Thorndyke Rd U V 104 Thorndyke Rd S Point Rd Peabody Way Thorndyke Rd µ Vicinity Map Figure 1 Shine Facility - Wahl Extraction Area Miles Sand & Gravel Company Shine, Washington ! ^ Olympia § ¨ ¦ 90 § ¨ ¦ 5 § ¨ ¦ 405 £ ¤ 101 Olympic NP Washington 3,000 3,000 0 Feet Data Sources: ESRI Data & Maps, Street Maps 2005 Notes: 1. The locations of all features shown are approximate. 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 3. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without permission. Transverse Mercator, State Plane South, North American Datum 1983 North arrow oriented to grid north Office: TACOPath: P:\1\1355035\GIS\135503500_F1.mxdMap Revised: 20 March 2012 syi E D E D E D Station 1 Station 2 Station 3 200 200 0 Feet Station 1 Station 3Station 2 Station 4 Legend @ A Monitoring Well E D Stream Gage & ( Shine Hub Weather Station Wahl Extraction Area MW-5 Station 1 Thomdyke Creek Creek Groundwater Data Shine Facility-Wahl Extraction Area Jefferson County, Washington Figure 2 SP:\1\1355035\00\finals\Shine Facility –2015 Annual Report_Figures2 through 4.pptx JWP 02/17/2016 Surface Water Data Shine Facility-Wahl Extraction Area Jefferson County, Washington Figure 3 SP:\1\1355035\00\finals\Shine Facility –2015 Annual Report_Figures2 through 4.pptx JWP 02/17/2016 1/1/041/1/051/1/061/ 1/071/1/081/1/091/1/101/1/111/1/121/1/131/1/141/1/151/1/16 Date 0 1 2 3 4 0.1 1 10 100 1000 Station1RelativeStageHeights WadedStreamFlowMeasurements 1/1/041/1/051/1/061/1/071/1/081/1/091/1/101/1/111/ 1/121/1/131/1/141/1/151/1/16 Date -1 0 1 2 3 4 0.1 1 10 100 1000 Station3RelativeStageHeights WadedStreamFlowMeasurements StreamBedEroded BelowStaffGageDatum ReplacedSensor 5/6/11 1/1/041/1/051/1/061 /1/071/1/081/1/091/1/101/1/111/1/121/1/131/1/141/1/151/1/16 Date 0 1 2 3 4 0.1 1 10 100 1000 Station2RelativeStageHeights WadedStreamFlowMeasurements RelocatedStation2 approximately300feetupstream on2/15/2011 FaultyReadings SensorReplaced 2/3/12 1/1/051/1/061/1/071/1/081/1/091/1/101/1/111/1/121/1/131/1/141/1/151/1/16 Date 0 1 2 3 4 0.1 1 10 100 1000 Station4RelativeStageHeights WadedStreamFlowMeasurements SensorReplaced 5/6/11 Precipitation Data Shine HubWeather Station Shine Facility-Wahl Extraction Area Jefferson County, Washington Figure 4 SP:\1\1355035\00\finals\Shine Facility –2015 Annual Report_Figures2 through 4.pptx JWP 02/17/2016 Notes: 1.The computer that automatically downloads weather data at the Shine site was damaged in a power outage. The damage has affected precipitation data since 2012. Daily rainfall data was acquired from Kitsap Public Utility District No. 1’s Edgewater gage, located approximately 5 miles to the southwest, for January 1, 2012 through December 31, 2015. 1/1/041/1/051/1/061/1/071/1/081/1/091/1/101/1/111/1/121/1/131/1/141/1/151/1/16 Date 0 1 2 3 4 5 ShineWeatherStation KitsapPUDEdgewater Station ATTACHMENT 1 Wahl Reclamation Map 2019 Miles Wahl Quarterly Inspection.pdfMicrosoft Word - 2019 Miles Wahl Quarterly Inspection 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 May 4, 2021 Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, Washington 98368 Attention: David W. Johnson Subject: 2019 On-Site Inspection of Miles Sand & Gravel Company, Shine Facility Wahl Extraction Area, WDNR Permit No. 70-013024 Jefferson County, Washington File No. 1355-035-06 This letter presents the results of the quarterly on-site inspection of the Shine Facility operated by Miles Sand & Gravel Company (Miles). Conditions 7 and 9 of Jefferson County Ordinance 08-706-04, amended by Jefferson County Ordinance 09-1213-10, require the submittal of a quarterly inspection report regarding mining operations located within a designated Aquifer Recharge Area. The intent is for this letter to satisfy the requirements of Conditions 7 and 9 and to present the results of the quarterly inspections in 2019. GeoEngineers, Inc. (GeoEngineers) conducted a review of workings for 2019 at the Wahl Extraction Area (WEA) within the Shine Facility on a quarterly basis. Eric Knoedler, Staff Hydrogeologist with GeoEngineers, and Eric Kittlesby, Environmental Specialist for Miles, conducted a tour of the operations during the last quarterly site visit on November 8, 2019. Mr. Knoedler and Mr. Kittlesby toured the boundaries of the permitted excavation area, which were marked with polyvinyl chloride (PVC) posts that extended 6 to 10 feet above ground. These posts were readily observed from a distance. The excavations, plant operations and mining activities were all occurring within the marked boundary. Approximately 92 acres have been disturbed within the WEA since the extraction process commenced in April 2013. Approximately 26 acres have been reclaimed in accordance with permit conditions. The Washington Department of Natural Resources (DNR) Permit No. 70-013024 for the WEA was approved on May 2, 2012. The permitted area encompasses a total of 183 acres, which includes the following: ■ 156 acres in the mining area (137 acres will be disturbed during the mining process, 19 acres of setbacks, buffers and wetlands will remain “as-is”). ■ 9 acres for the utility and maintenance road easement. ■ 18 acres for the Operations and Processing Facility. Jefferson County Department of Community Development | May 4, 2021 Page 2 File No. 1355-035-05 SUMMARY The following is a summary of observations made during the quarterly site visits: ■ Boundaries of the permitted areas were clearly marked. ■ No mining activities were occurring outside of the permitted areas. ■ The stormwater pond, the location of a water quality monitoring point G002-SG02 (previously referred to as MP 1), was absent of sheen. Copies of the four quarterly Discharge Monitoring Reports (DMRs) that Miles submitted to the Department of Ecology are attached. The DMRs show the results at four monitoring points. The monitoring points G004-PG02, G003-PG01, G001-SG01, and G002-SG-02 and (previously referred to as MP 1, MP 2, MP 3 and MP 4, respectively) are shown on the attached Shine Facility Map. ■ Approximately 26 acres of the 82 acres mined since April 2013 have been reclaimed through 2019. RECOMMENDATIONS GeoEngineers has been monitoring the WEA since operations began. Based on the previous observations and the level of mining activity at the site, we recommended that the discharge monitoring should continue on a quarterly basis and the reporting should be done on an annual basis. Annual reporting of quarterly monitoring results was approved via email by David W. Johnson of Jefferson County on March 3, 2014. Please contact us if you have any questions concerning this report. Sincerely, GeoEngineers, Inc. Eric N. Knoedler, LG Bridget A. August, LG, LHG Hydrogeologist Senior Hydrogeologist Galan W. McInelly, LG, LHG Principal ENK:BAA:GWM:leh Attachments: Quarterly Discharge Monitoring Reports for 2019 Shine Facility Map cc: Ryan Ransavage Miles Sand & Gravel Company Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. May 4, 2021 Monitoring Period:01/01/2019 - 03/31/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 G001 3-T 1/15/19 C No 8-W 2/20/19 7.5 No 11-Th 3/14/19 C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:01/01/2019 - 03/31/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 3-T 1/15/19 No 8-W 2/20/19 No 11-Th 3/14/19 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:01/01/2019 - 03/31/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 3-T 1/15/19 No 8-W 2/20/19 No 11-Th 3/14/19 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:01/01/2019 - 03/31/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 3-T 1/15/19 C No 8-W 2/20/19 C No 11-Th 3/14/19 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Ryan Ransavage Signature Date 4/24/2019 2:36:46 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:04/01/2019 - 06/30/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 G001 3-M 4/15/19 7.9 No 7-F 5/17/19 C No 11-T 6/11/19 C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:04/01/2019 - 06/30/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 3-M 4/15/19 No 7-F 5/17/19 No 11-T 6/11/19 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:04/01/2019 - 06/30/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 3-M 4/15/19 No 7-F 5/17/19 No 11-T 6/11/19 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:04/01/2019 - 06/30/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 3-M 4/15/19 C No 7-F 5/17/19 C No 11-T 6/11/19 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Ryan Ransavage Signature Date 7/30/2019 7:47:53 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:07/01/2019 - 09/30/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 G001 3-M 7/15/19 C No 7-T 8/13/19 C No 12-M 9/16/19 C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:07/01/2019 - 09/30/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 3-M 7/15/19 No 7-T 8/13/19 No 12-M 9/16/19 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:07/01/2019 - 09/30/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 3-M 7/15/19 No 7-T 8/13/19 No 12-M 9/16/19 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:07/01/2019 - 09/30/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 3-M 7/15/19 C No 7-T 8/13/19 C No 12-M 9/16/19 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Ryan Ransavage Signature Date 10/14/2019 8:02:34 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 Monitoring Period:10/01/2019 - 12/31/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G001 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G001 G001 3-F 10/18/19 C No 7-M 11/11/19 C No 12-T 12/17/19 C No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 4 Monitoring Period:10/01/2019 - 12/31/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G002 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G002 3-F 10/18/19 No 7-M 11/11/19 No 12-T 12/17/19 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 4 Monitoring Period:10/01/2019 - 12/31/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G003 - Process to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G003 3-F 10/18/19 No 7-M 11/11/19 No 12-T 12/17/19 No Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 3 of 4 Monitoring Period:10/01/2019 - 12/31/2019 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: G004 - Storm to Ground MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek G004 G004 3-F 10/18/19 C No 7-M 11/11/19 C No 12-T 12/17/19 C No Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Ryan Ransavage Signature Date 1/30/2020 8:27:03 AM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 4 of 4 ! ! # # # # Thorndyke Creek G002-SG02 G001-SG01 G004-PG02G 003-PG01 1,800 Ft Shine Facility ° Legend Permit Boundary Waterbodies Drainage Area* g Catch Basins # Processwater to Ground # Processwater to Surface # Stormwater to Ground # Stormwater to Surface ! Bulk Material Unloading ! Fuel ! Outdoor Material Storage ! Outdoor Processing ! Shop ! Underground Storage Tank/Fuel *Area slopes to monitoring point unless noted otherwise. Flow 2011 Shine Facility - Wahl Extraction Area Groundwater Report.pdfMicrosoft Word - Shine Facility - Wahl Extraction Area Groundwater Study 2011.docx 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 March 20, 2012 Miles Sand & Gravel Company PO Box 130 Auburn, Washington 98071 Attention: Mike Schuh Subject: Letter Report Current Groundwater, Surface Water and Precipitation Monitoring Data Shine Facility – Wahl Extraction Area Jefferson County, Washington File No. 1355-035-00 It is our understanding that the Washington Department of Natural Resources (DNR) is requiring Miles Sand & Gravel Company (Miles) to submit a Groundwater Study along with their request for a DNR Reclamation Permit #70-013024 at the Shine Facility – Wahl Extraction Area (WEA) located in Jefferson County, Washington. Monitoring requirements at the site were set forth by Jefferson County Department of Community Development (DCD) as conditions of the Wahl Permit (MLA03-0037), dated July 18, 2005, prepared originally for Fred Hill Materials (FHM), and Ordinance 08-0706-04 (MLA10-00073), Amendment 09-1213-10 dated December 18, 2010. The purpose of this letter is to provide a summary of the water monitoring program implemented for the WEA as of the last data download event and to compare the high groundwater table elevations with the proposed excavation elevations at the WEA. PREVIOUS AND CURRENT MONITORING The original monitoring, initiated in August 2005, was conducted by CR Hydrogeologic Consulting for Fred Hill Materials. GeoEngineers assumed the monitoring duties in November 2009 when Miles commenced leasing the operations at the WEA. The monitoring locations are shown on Figure 1. The following are elements of the current monitoring program: Groundwater ■ Groundwater-level monitoring at the WEA began in August 2005 with the installation of a pressure transducer and datalogger in MW-9, a monitoring well located in the southwest portion of the WEA. The automated equipment records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The monitoring equipment is still functioning and has provided reliable data. Miles Sand & Gravel Company | March 20, 2012 Page 2 File No. 1355-035-00 ■ A pressure transducer and datalogger was installed in the Shine Hub water-supply well in April 2007. The equipment malfunctioned in June 2010 and was replaced in September 2010 with new equipment from the same manufacturer. The automated equipment records the groundwater level on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. With the exception of a few months in 2010, the monitoring equipment has provided reliable data. ■ In January 2010, additional monitoring wells (MW-5 and MW-8) were added by Miles to estimate a groundwater surface profile beneath the WEA. The installed equipment is of the same manufacturer as the equipment installed in MW-9 and the Shine Hub well. The automated equipment records groundwater levels on an hourly basis and the information is downloaded quarterly during a visual inspection of the site. The current monitoring equipment provides reliable data. Surface Water ■ Three surface water stations were established in September 2005 on Thorndyke Creek near the WEA. One of the stations (Station 3) is located on an unnamed tributary and two are located on Thorndyke Creek, with Station 2 above and Station 1 below the confluence of the unnamed tributary. The stream stage height at each station is recorded on an hourly basis using automated equipment. The streamflow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ An additional surface water monitoring point (Station 4) is located on Thorndyke Creek approximately 1 mile upstream of its mouth. The stream stage height is recorded on an hourly basis using automated equipment. The stream flow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ The automated equipment previously installed at the surface water stations has been replaced at all four stations in 2011 and 2012 with more reliable dataloggers. Precipitation ■ A weather station was established on the roof of the office building at the current Shine Hub in September 2005. The data, collected on an hourly basis, includes precipitation, temperature and wind direction and speed. The weather station is still functional and provides reliable data. MONITORING DATA SUMMARY The monitoring data was last collected at the WEA on February 8, 2012. GeoEngineers has developed plots of the monitoring data described below. The water levels have been converted to water level elevations. The elevations of the groundwater monitoring points (rims of the well casings) have been surveyed to the National Geodetic Vertical Datum (NGVD) 1929 datum. At this time, mining has not yet commenced in the WEA but several years of background groundwater, surface water and precipitation data have been acquired. Groundwater Data Figure 2 shows a plot of the groundwater data for the WEA from four monitoring points. The Shine Hub water supply well is located near the current office buildings at the Shine Facility (Figure 1). Monitoring wells MW-5, MW-8 and MW-9 are located within the WEA. Miles Sand & Gravel Company | March 20, 2012 Page 3 File No. 1355-035-00 Shine Hub Water Supply Well The hourly data from the Shine Hub water supply well are shown on Figure 2 as points because the well pump cycles on and off several times a day. The lowest water level elevations in the Shine HUB water supply well represent pumping water levels and the highest represent fully or nearly recovered water levels. The data in-between represent water levels that are either recovering or are being drawn down at various stages of the pumping cycle. The highest levels show a pattern similar to the other three monitoring wells described below that are located over a mile west of the Shine HUB well. Monitoring Wells MW-5, MW-8 and MW-9 The dataset with the longest period of record is for monitoring well MW-9, beginning in August 11, 2005. The groundwater elevations in all the wells show similar seasonal fluctuations of rising levels in the winter wet months and declining levels between spring and fall. During the winter of 2008/2009, there was below-normal precipitation that was indicated by a decline in water levels from between early 2008 and late 2009. It also appears that, depending on the recent precipitation rates in 2012, the winter of 2011/2012 could show the same pattern of declining water levels through the winter. The highest recorded groundwater elevations were 279.50, 275.12 and 278.88 feet NGVD for MW-5, MW-8 and MW-9, respectively. Surface Water Data Figure 3 shows a plot of the surface water data for Station 1, located on Thorndyke Creek southwest of the southernmost extent of the WEA, as a typical example of the surface water datasets. An elevation of 233 feet mean sea level (MSL) is estimated at Station 1 based on the U.S. Geologic Survey topographic map. Figure 3 shows the stage heights as recorded at a 30-minute interval using dataloggers. The stage height dataset had three relatively short periods in 2010 and 2011 when the data was lost due to the faulty recording equipment. The equipment was replaced in 2012 with more a reliable dataloggers. Figure 3 also shows the streamflow rates that were measured by wading the stream and plotted on a logarithmic vertical scale. The highest recorded flow was 56.27 cubic feet per second on January 4, 2008. Precipitation Data Figure 4 shows a plot of the daily precipitation at the weather station located on the roof of the Shine Hub office. The highest recorded daily precipitation event was 3.11 inches on December 3, 2007. GROUNDWATER ELEVATIONS VERSUS PROPOSED EXCAVATION FLOOR The proposed excavation elevations are shown on the attached plan titled “WDNR Permit No. 70-013024 Final Reclamation Map” as prepared by Team 4 Engineering. It appears that the plan does show that the excavation will stay 10 feet above the high groundwater table, as a currently required condition, in the central and north portions of the WEA. For example, the highest recorded groundwater elevation at MW-9 was Elevation 278.88 feet and the proposed excavation there is Elevation 290 feet. Miles proposes to excavate to Elevation 275 feet in the southernmost extent of the WEA. Although there is a lack of groundwater monitoring data points in this area, it is our opinion that Elevation 275 feet is a reasonable depth based on additional data gathered by Fred Hill Materials (FHM) at MW-15, located Miles Sand & Gravel Company | March 20, 2012 Page 4 File No. 1355-035-00 approximately 500 feet south of the southern WEA mining disturbance boundary (Figure 1). The high water level recorded at MW-15 was reported by FHM to be 50 feet below ground, or Elevation 254 feet. Based on a uniform gradient between MW-9 and MW-15, the high groundwater elevation would be approximately Elevation 259 feet at the southern mining disturbance boundary and approximately Elevation 264 feet at the northern extent of the 275-foot excavation elevation contour shown on the Reclamation Map (Attachment 1). Thus, the proposed excavation elevation of Elevation 275 feet will be greater than 10 feet above the highest groundwater table based on available data. CONCLUSIONS Monitoring data for groundwater, surface water and precipitation at the Wahl Extraction Area are being collected by GeoEngineers on an ongoing basis to develop an extensive background data set, as required under permit conditions and local ordinances. Data have been collected since 2005, and additional groundwater monitoring locations installed in 2009 have allowed the estimation of a groundwater elevation profile beneath the planned mining area. Based on the groundwater data collected to date, the gravel mine excavations proposed by Miles Sand & Gravel Co. at the Wahl Extraction Area are 10 feet or greater above the highest projected groundwater surface elevations. Please contact us if you have any questions about the water monitoring program. Sincerely, GeoEngineers, Inc. Joel W. Purdy, LG, LHG Senior Hydrogeologist Michael A.P. Kenrick, PE, LHG Principal Hydrogeologist JWP:MAPK:lc Copyright© 2012 by GeoEngineers, Inc. All rights reserved. Attachments: Figure 1. Vicinity Map Figure 2. Groundwater Data Figure 3. Surface Water Data Figure4. Precipitation Data Attachment 1. Wahl Reclamation Map Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. & ( E D E D E D E D @ A @ A @ A @ A @ A Shine Hub Weather Station MW-15 MW-8 MW-5 MW-9 Shine Hub Water Supply Well Wahl Lake Rd Thorndyke Rd U V 104 Thorndyke Rd S Point Rd Peabody Way Thorndyke Rd µ Vicinity Map Figure 1 Shine Facility - Wahl Extraction Area Miles Sand & Gravel Company Shine, Washington ! ^ Olympia § ¨ ¦ 90 § ¨ ¦ 5 § ¨ ¦ 405 £ ¤ 101 Olympic NP W a s h i n g t o n 3,000 3,000 0 Feet Data Sources: ESRI Data & Maps, Street Maps 2005 Notes: 1. The locations of all features shown are approximate. 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 3. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without permission. Transverse Mercator, State Plane South, North American Datum 1983 North arrow oriented to grid north Office: TACOPath: P:\1\1355035\GIS\135503500_F1.mxdMap Revised: 20 March 2012 syi E D E D E D Station 1 Station 2 Station 3 200 200 0 Feet Station 1 Station 3Station 2 Station 4 Legend @ A Monitoring Well E D Stream Gage & ( Shine Hub Weather Station Wahl Extraction Area MW-5 Station 1 Thomdyke Creek Creek 2013 Q4 Miles Shine Facility Conditions 7 9_Quarterly Inspection Final Report.pdfMiles Sand and Gravel Co 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 February 26, 2014 Jefferson County Department of Community Development 621 Sheridan Street Port Townsend, Washington 98368 Attention: David Wayne Johnson Subject: Quarterly (Q4 2013) On-Site Inspection of Miles Sand & Gravel Company, Shine Facility Wahl Extraction Area, WDNR Permit No. 70-013024 Jefferson County, Washington File No. 1355-035-00 This letter presents the results of the quarterly on-site inspection of the Shine Facility operated by Miles Sand & Gravel Company (Miles). Conditions 7 and 9 of Jefferson County Ordinance 08-706-04, amended by Jefferson County Ordinance 09-1213-10, requires the submittal of a quarterly inspection report regarding mining operations located within a designated Aquifer Recharge Area. The intent is for this letter to satisfy the requirements of Conditions 7 and 9 and to present the quarterly inspection report for the fourth quarter of 2013. On January 31, 2014, Jacob Letts, a Licensed Hydrogeologist with GeoEngineers, inspected the Wahl Extraction Area (WEA) within the Shine facilities. Lars Ejde, Facilities Manager for Miles, provided a tour of the operations. Mr. Ejde showed the boundaries of the permitted excavation area. The boundaries of the permitted area are marked with PVC posts that extend 6 to 10 feet above ground. These posts were readily observed from a distance. The excavations, plant operations, and mining activities were all occurring within the marked boundary. No reclamation was occurring within the WEA since the extraction process had recently commenced in April 2013. Stumps and overburden soils salvaged from excavated areas have been stockpiled on site for future reclamation. The Washington Department of Natural Resources Permit No. 70-013024 for the WEA was approved on May 2, 2012. The permitted area encompasses a total of 183 acres, which includes the following: ■ 156 acres in the mining area (137 acres will be disturbed during the mining process, 19 acres of setbacks, buffers and wetlands will remain “as-is”). ■ 9 acres for the utility and maintenance road easement. ■ 18 acres for the Operations and Processing Facility. Jefferson County Department of Community Development | February 26, 2014 Page 2 File No. 1355-035-00 SUMMARY The following is a summary of observations made during the quarterly visit: ■ Boundaries of the permitted areas were clearly marked. ■ No mining activities were occurring outside of the permitted areas. ■ The stormwater pond, the location of a water quality monitoring point, was absent of sheen. A copy of the Discharge Monitoring Report Miles submitted to the Dept. of Ecology is attached. ■ No reclamation has occurred at the WEA. RECOMMENDATIONS GeoEngineers has been monitoring the WEA since operations began. Based on the previous observations and the level of mining activity at the site, we recommend that the discharge monitoring should continue on a quarterly basis and the reporting should be done on an annual basis. Each annual report will include the quarterly discharge monitoring reports. Please contact us if you have any questions concerning this quarterly report. Sincerely, GeoEngineers, Inc. Joel W. Purdy, LG, LHG Senior Hydrogeologist Michael A.P. Kenrick, PE, LHG Senior Principal JWP:MAPK:lc Copyright© 2014 by GeoEngineers, Inc. All rights reserved. Attachments: Miles Discharge Monitoring Report Shine Facility Map cc: Mike Schuh Miles Sand & Gravel Company Disclaimer: Any electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of the original document. The original document is stored by GeoEngineers, Inc. and will serve as the official document of record. Monitoring Period:10/01/2013 - 12/31/2013 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP1 - Storm to Ground - Exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP 3 MP1 MP1 3-Th 10/17/13 No C No 6-Th 11/7/13 No C No 11-T 12/10/13 No C No Total 0 <= 0 Reporting Codes Used: C - No Discharge Version: 1 Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 1 of 2 Monitoring Period:10/01/2013 - 12/31/2013 Facility County: Jefferson WAG501120Permit Number: Permittee: Receiving Waterbody: Outfall: MP2 - Process to Ground - exact location not known MILES SAND & GRAVEL SHINE PIT Monitoring PointWeek MP2 3-Th 10/17/13 No 6-Th 11/7/13 No 11-T 12/10/13 No Total 0 <= 0 Reporting Codes Used: C - No Discharge Version: 1 I certify under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Dave Lewis Signature Date 1/3/2014 3:45:55 PM Washington State Department of Ecology Discharge Monitoring Report (DMR) Page: 2 of 2 2012 Shine Facility - Wahl Extraction Area Groundwater Report.pdfMicrosoft Word - Shine Facility - Wahl Extraction Area Groundwater Study.docx 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98402 253.383.4940 February 25, 2013 Miles Sand & Gravel Company 400 Valley Avenue NE Puyallup, Washington 98372 Attention: Mike Schuh Subject: Letter Report 2012 Groundwater, Surface Water and Precipitation Monitoring Data Shine Facility – Wahl Extraction Area Jefferson County, Washington File No. 1355-035-00 It is our understanding that the Washington Department of Natural Resources (DNR) is requiring Miles Sand & Gravel Company (Miles) to submit a Groundwater Study along with their request for a DNR Reclamation Permit #70-013024 at the Shine Facility – Wahl Extraction Area (WEA) located in Jefferson County, Washington. Monitoring requirements at the site were set forth by Jefferson County Department of Community Development (DCD) as conditions of the Wahl Permit (MLA03-0037), dated July 18, 2005, prepared originally for Fred Hill Materials (FHM) and Ordinance 08-0706-04 (MLA10-00073), Amendment 09-1213-10 dated December 18, 2010. The purpose of this letter is to provide a summary of the water monitoring program implemented for the WEA as of the last data download event on February 1, 2013 and to compare the high groundwater table elevations with the proposed excavation elevations at the WEA. PREVIOUS AND CURRENT MONITORING The original monitoring, initiated in August 2005, was conducted by CR Hydrogeologic Consulting FHM. GeoEngineers assumed the monitoring duties in November 2009 when Miles commenced leasing the operations at the WEA. The monitoring locations are shown on Figure 1. The following are elements of the current monitoring program: Groundwater ■ Groundwater-level monitoring at the WEA began in August 2005 with the installation of an automated water-level sensor (consisting of a combined pressure transducer and datalogger) in MW-9, a monitoring well located in the southwest portion of the WEA. The automated sensor measures and records the groundwater level on an hourly basis and the information is downloaded quarterly during Miles Sand & Gravel Company | February 25, 2013 Page 2 File No. 1355-035-00 a visual inspection of the site. The monitoring equipment is still functioning and has provided reliable data. ■ A water-level sensor was installed in the Shine Hub water-supply well in April 2007. The sensor malfunctioned in June 2010 and was replaced in September 2010 with new equipment from the same manufacturer. With the exception of a few months in 2010, the monitoring equipment has provided reliable data. ■ In January 2010, additional monitoring wells (MW-5 and MW-8) equipped with sensors were added by Miles to estimate a groundwater surface profile beneath the WEA. The installed sensors are from the same manufacturer as those installed in MW-9 and the Shine Hub well. The current monitoring equipment provides reliable data. ■ In 2012, MW-5 was deepened to explore for a groundwater supply for the facility. The exploration was unsuccessful and MW-5 was decommissioned. Thus, the water level sensor from MW-5 was moved to MW-15 on February 15, 2012. MW-15 is located approximately 550 feet south of the proposed mining area and now provides a monitoring point for the southern portion of the WEA. Surface Water ■ Three surface water stations were established in September 2005 on Thorndyke Creek near the WEA. One of the stations (Station 3) is located on an unnamed tributary and two are located on Thorndyke Creek, with Station 2 upstream and Station 1 located downstream of the confluence with the unnamed tributary. The stream stage height at each station is recorded on an hourly basis using an automated sensor. The streamflow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ An additional surface water monitoring point (Station 4) is located on Thorndyke Creek approximately 1 mile upstream of its mouth. The stream stage height is recorded on an hourly basis using an automated sensor. The stream flow is measured manually on a quarterly basis by wading the stream and measuring stream velocity. ■ The automated equipment previously installed at the surface water stations was replaced at all four stations in 2011 and 2012 with more reliable sensors. Precipitation ■ A weather station was established on the roof of the office building at the current Shine Hub in September 2005. The data, collected on an hourly basis, includes precipitation, temperature and wind direction and speed. Between March 14 and October 17, 2012, the weather station experienced a loss of data. Miles has reportedly implemented periodic data downloads to minimize potential future loss of data. As of October 17, 2012, the weather station is functional and once again is providing reliable data. MONITORING DATA SUMMARY The latest set of monitoring data was collected at the WEA on February 1, 2013. GeoEngineers has developed plots of the monitoring data described below. It is anticipated that mining in the WEA will Miles Sand & Gravel Company | February 25, 2013 Page 3 File No. 1355-035-00 commence in the next quarter. Several years of background groundwater, surface water and precipitation data have now been acquired. Groundwater Data The elevations of the groundwater monitoring points (rims of the well casings) have been surveyed relative to the National Geodetic Vertical Datum (NGVD) 1929 datum. The water levels measured in each monitoring well have been converted to groundwater elevations. Figure 2 shows a plot of groundwater elevations from the four monitoring wells and the Shine Hub watersupply well. The water-supply well is located near the office buildings at the Shine Facility (Figure 1). Monitoring wells MW-5, MW-8 and MW-9 are located within the WEA; monitoring wells MW-15 is located approximately 550 feet south of the WEA. Shine Hub Water Supply Well The hourly data from the Shine Hub water supply well are shown on Figure 2 as points because the well pump cycles on and off several times a day. The lowest water level elevations in the Shine HUB water supply well represent pumping water levels and the highest represent fully or nearly recovered water levels. The data in-between represent water levels that are either recovering or are being drawn down at various stages of the pumping cycle. The highest levels show a pattern similar to the other monitoring wells described below that are located over a mile west of the Shine Hub well. Monitoring Wells MW-5, MW-8 and MW-9 The dataset with the longest period of record is for monitoring well MW-9, beginning in August 11, 2005. The groundwater elevations in all the wells show similar seasonal fluctuations of rising levels in the winter wet months and declining levels between spring and fall. During the winter of 2008-09, there was belownormal precipitation that was indicated by a decline in water levels from between early 2008 and late 2009. The highest recorded groundwater elevations were all recorded in 2011. These groundwater elevations were 279.50, 275.12 and 278.88 feet NGVD for MW-5, MW-8 and MW-9, respectively. Surface Water Data Figure 3 shows a plot of the surface water data for Station 1, located on Thorndyke Creek southwest of the southernmost extent of the WEA, as a typical example of the surface water datasets. An elevation of 233 feet NGVD is estimated at Station 1 based on the U.S. Geologic Survey topographic map. Figure 3 shows the stage heights as recorded at a 30-minute interval using dataloggers. The stage height dataset had three relatively short periods in 2010 and 2011 when the data was lost due to faulty monitoring sensors. The equipment was replaced in early 2012 with more reliable sensors. Figure 3 also shows the streamflow rates calculated from flow velocities that were measured by wading the stream; these are plotted on a logarithmic vertical scale (right-hand axis). The highest recorded flow at Station 1 was 56.27 cubic feet per second on January 4, 2008. Precipitation Data Figure 4 shows a plot of the daily precipitation at the weather station located on the roof of the Shine Hub office. The highest recorded daily precipitation event was 3.11 inches on December 3, 2007. Miles Sand & Gravel Company | February 25, 2013 Page 4 File No. 1355-035-00 GROUNDWATER ELEVATIONS VERSUS PROPOSED EXCAVATION FLOOR The proposed excavation elevations are shown on the attached plan titled “WDNR Permit No. 70-013024 Final Reclamation Map” as prepared by Team 4 Engineering. It appears that the plan does show that the excavation will stay 10 feet above the high groundwater table, as a currently required condition, in the central and north portions of the WEA. For example, the highest recorded groundwater elevation at MW-9 was Elevation 278.88 feet and the proposed excavation there is Elevation 290 feet. Miles proposes to excavate to Elevation 275 feet in the southernmost extent of the WEA. Prior to 2012 there was a lack of groundwater monitoring data points in this area. Monitoring of MW-15, located approximately 550 feet south of the southern WEA mining disturbance boundary (Figure 1), indicates that the highest water level recorded at MW-15 was Elevation 254.34 feet. Based on a uniform gradient between MW-9 and MW-15, the high groundwater elevation would be approximately Elevation 259 feet at the southern mining disturbance boundary and approximately Elevation 264 feet at the northern extent of the 275-foot excavation elevation contour shown on the Reclamation Map (Attachment 1). Thus, the proposed excavation elevation of Elevation 275 feet will be greater than 10 feet above the highest groundwater table based on available data. CONCLUSIONS Monitoring data for groundwater, surface water and precipitation at the Wahl Extraction Area are being collected by GeoEngineers on an ongoing basis to develop an extensive background data set, as required under permit conditions and local ordinances. Data have been collected since 2005, and additional groundwater monitoring locations installed in 2009 have allowed the estimation of a groundwater elevation profile beneath the planned mining area. Based on the groundwater data collected to date, the gravel mine excavations proposed by Miles Sand & Gravel Co. at the Wahl Extraction Area are 10 feet or greater above the highest projected groundwater surface elevations. & ( E D E D E D E D @ A @ A @ A @ A @ A Shine Hub Weather Station MW-15 MW-8 MW-5 MW-9 Shine Hub Water Supply Well Wahl Lake Rd Thorndyke Rd U V 104 Thorndyke Rd S Point Rd Peabody Way Thorndyke Rd µ Vicinity Map Figure 1 Shine Facility - Wahl Extraction Area Miles Sand & Gravel Company Shine, Washington ! ^ Olympia § ¨ ¦ 90 § ¨ ¦ 5 § ¨ ¦ 405 £ ¤ 101 Olympic NP W a s h i n g t o n 3,000 3,000 0 Feet Data Sources: ESRI Data & Maps, Street Maps 2005 Notes: 1. The locations of all features shown are approximate. 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 3. It is unlawful to copy or reproduce all or any part thereof, whether for personal use or resale, without permission. Transverse Mercator, State Plane South, North American Datum 1983 North arrow oriented to grid north Office: TACOPath: P:\1\1355035\GIS\135503500_F1.mxdMap Revised: 20 March 2012 syi E D E D E D Station 1 Station 2 Station 3 200 200 0 Feet Station 1 Station 3Station 2 Station 4 Legend @ A Monitoring Well E D Stream Gage & ( Shine Hub Weather Station Wahl Extraction Area MW-5 Station 1 Thomdyke Creek Creek Monitoring well MW-15 not surveyed; top of casing elevation of 304.56 based on elevation data provided by Fred Hill Materials. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 1. 2. Notes: Groundwater Data Shine Facility – Wahl Extraction Area Miles Sand and Gravel Company Figure 2 TACO: \1\1355035\00\Final s\Figure 2 Groundwater Data.pdf MAPK:JWP:jml 012513 MW-5 was decommissioned. Transducer moved to MW-15 This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 1. Notes: Surface Water Data Shine Facility – Wahl Extraction Area Miles Sand and Gravel Company Figure 3 TACO: \1\1355035\00\Finals\Figure 3 Surface Water Data.pdf MAPK:JWP:jml 012913 Installed INW PT2X Precipitation data from the period 3/14/12 to 10/17/12 missing due to weather station data loss. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. 1. 2. Notes: Precipitation Data Shine Hub Weather Station Shine Facility – Wahl Extraction Area Miles Sand and Gravel Company Figure 4 TACO: \1\1355035\00\Finals\Figure 4 Precipitation Data.pdf MAPK:JWP:jwp 031512 Data loss between March 14 and October 17, 2012 ATTACHMENT 1 Wahl Reclamation Map