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HomeMy WebLinkAbout2017-07-06 Draft_WQMPP Hoh River DRAFT Water Quality Monitoring Plan (WQMP) Upper Hoh River Road Bank Stabilization and Culvert Replacement Prepared by David Evans and Associates, Inc. 14432 SE Eastgate Way, Suite 400 Bellevue, WA 98007 July 6, 2017 Water Quality Monitoring Plan Page | 1 Upper Hoh River Bank Stabilization PURPOSE The Water Quality Monitoring Plan (WQMP) will be used to track the performance of Best Management Practices (BMPs) used during in-water work within the project limits of the Upper Hoh River Road Bank Stabilization and Culvert Replacement project (Project). This WQMP includes a monitoring schedule (Table 1) that identifies the appropriate parameters to be monitored, locations, monitoring and sampling procedures, and frequency. Attachment A is a Sample Monitoring Results Recording Form. OBJECTIVES This WQMP will:  Through water quality monitoring and sampling, document the performance of BMPs used within waters of the state, including wetlands, in which the project requires work.  Determine if Water Quality Standards are being met at the edge of the point of compliance. Any changes to monitoring must be approved by Ecology prior to making the changes. IN-WATER/OVER WATER ACTIVITY DESCRIPTION The Project will construct bank stabilization measures in the form of engineered log jams with dolosse (ELJ/dolosse) at three locations needing bank stabilization. It will also replace three tributary crossings: the culvert at MP 4.38, the Tower Creek Bridge with a new bridge, and the Canyon Creek culvert with a bridge. The following activities will occur below the Ordinary High Water Mark (OHWM) of the Hoh River or of nearby wetlands:  Installation of temporary stream diversions at replaced stream crossings;  Installation of flow deflection at locations along the Hoh River near bank stabilization sites;  Excavation and fill activities related to culvert demolition and ELJ/dolosse installation;  Installation of a new 16- by 16-foot concrete box culvert at MP 4.38; and  Restoration of disturbed stream banks following culvert removal and bridge construction at Canyon Creek. The Project also includes roadway realignment and regrading at the tributary crossings to accommodate the new structures. Roadway stormwater ditches will be improved in some areas. Water quality monitoring includes stormwater monitoring at the discharge points of these ditches as shown on the monitoring locations map in Attachment B. Water Quality Monitoring Plan Page | 2 Upper Hoh River Bank Stabilization BEST MANAGEMENT PRACTICES (BMPS) BMPs will be in place at the monitoring locations shown on maps in Attachment B. Silt fence will be used to contain turbid runoff from disturbed areas along the roadway, particularly around the bridge and culvert replacement work. Check dams will be installed within roadway ditches to reduce flow and retain sediment. The ELJ/dolosse structures will be installed along the edge of water in the Hoh River. Typical BMPs are not practical in these locations but measures will be taken to contain disturbance and minimize impacts. Environmental commitments for this project are provided in Appendix C. WATER QUALITY STANDARDS FOR SURFACE WATERS This project is located in Water Resource Inventory Area (WRIA) 20, and involves work in the Upper Hoh River, Tower Creek, Canyon Creek, and an unnamed tributary to the Hoh River. Turbidity is the main concern during construction of this project and is the focus of this monitoring plan. The Water Quality Standard for turbidity on all project reaches is:  5 nephelometric turbidity unit (NTU) over background when the background is 50 NTU or less; or  A 10 percent increase in turbidity when the background turbidity is more than 50 NTU. MONITORING PLAN Monitoring Contacts Steve Morrow with Federal Highway Administration’s Western Federal Lands Highway Division will be responsible for providing Ecology with the necessary notifications and results of the water quality monitoring according to the frequency specified in the Section 401 Water Quality Certification (401). Monitoring personnel who will conduct the 401 water quality monitoring will be determined by the contractor. Name: TBD Office Phone: TBD Cell Phone: TBD Monitoring Schedule Table 1 outlines the monitoring parameters and schedule for all in-water work activities. Water Quality Monitoring Plan Page | 3 Upper Hoh River Bank Stabilization Table 1 Monitoring Parameters and Standard Schedule In-water Activities Monitoring Point Location Frequency Parameters Water Quality Standard - Hoh River ELJ/dolosse Installation - MP 4.38 culvert replacement - Tower Creek bridge replacement - Canyon Creek culvert removal/bridge installation See Attachment B Once per week Turbidity See Turbidity Standard Above Monitoring Duration Grab samples and visual observations will be collected for the duration of the construction activity that has triggered monitoring. Visual monitoring will be performed continuously for (1) all work below the OHWM, but not within the wetted perimeter, and (2) for all over water work activities. Contingency Sampling If sample results confirm that water quality is out of compliance with water quality standards, the contractor will modify or stop the activity causing the problem and commence the contingency sampling requirements (Table 2) until standards are met for two consecutive sample periods. Table 2 Contingency Sampling Requirements Parameter Contingency Sampling Location Contingency Frequency Water Quality Standard Turbidity Point of Non Compliance Hourly 5 NTU over background when background is 50 NTU, or a 10% increase in turbidity when background is >50NTU. See section below on Sampling Protocol for a discussion of background turbidity. Once compliance with water quality standards is achieved, the project shall return to its standard sampling schedule. Non Compliance If either visual or physical monitoring indicates that water quality standards have been exceeded, the required reporting, as discussed below, will be initiated. Water Quality Monitoring Plan Page | 4 Upper Hoh River Bank Stabilization SAMPLING PROTOCOL Sampling Locations Monitoring locations are provided on the attached maps, in Attachment B, for activities below the OHWM and for locations where stormwater may leave the site. In general, in the Hoh River, turbidity will be measured at a point of compliance 300 feet downstream of each bank stabilization site. Turbidity will also be measured 50 to 100 feet upstream of each bank stabilization site to obtain background turbidity levels for comparison. At the structure crossings, turbidity will be measured up to 200 feet downstream of the construction area where possible. At some locations, the confluence with the Hoh River is less than 200 feet from the construction area. In these cases, monitoring will occur just upstream from the confluence with the Hoh River. Turbidity will also be measured roughly 50 feet upstream of the structure crossing construction to establish background turbidity levels. The sampling locations are labeled as follows:  POC# – Point of Compliance; for river locations downstream of construction (7 sample sites)  B# – Background; for upstream background sample site (7 sample sites)  D# – Discharge; for roadside ditch discharge points (13 sample sites) Sampling Procedures A background sample must be taken outside the area of influence and immediately prior to the downstream or radius samples. Water samples will be collected and analyzed for the appropriate parameters, per the Monitoring Schedule above, following the equipment and sampling guidelines below:  Turbidity will be monitored using a Hach 2100P turbidimeter, or similar equipment;  The first compliance sample for turbidity will be taken approximately 1 hour after the in- water activity starts, unless there is a visual plume at the point of compliance prior to 1 hour;  A portable turbidity meter will be used in the field. A representative sample should accurately reflect the true condition of the water source from which the sample was taken. The following protocol will be used to ensure a representative sample is analyzed:  Use a clean container to obtain a grab sample from the source;  Collect sample with care to avoid disturbance of sediments and collecting surface contaminants;  Gently but thoroughly mix the sample before pouring it into the small vial used to read the sample in the turbidimeter; and  Without allowing the sample to settle, take turbidity reading according to turbidimeter manufacturer’s instructions. Water Quality Monitoring Plan Page | 5 Upper Hoh River Bank Stabilization  A calibration check of the turbidimeter using secondary standards will be carried out regularly (at least once per week). The instrument will be recalibrated using primary standards at least once every 3 months, or more when a calibration check indicates there is a problem. The manufacturer’s calibration procedures will be followed. REPORTING All water quality monitoring results (visual and physical) will be recorded on the monitoring form attached (Attachment A). All sample results will be submitted to the Ecology Federal Permit Manager/Coordinator at the frequency specified in the 401. If sample results or visual monitoring indicate a exceedance of water quality standards, notification shall be made within 24 hours to Ecology’s Federal Permit Manager/Coordinator. ATTACHMENTS Attachment A - Sample Monitor Results Reporting Form Attachment B - Monitoring Location Maps Attachment C – Environmental Commitments Water Quality Monitoring Plan Upper Hoh River Bank Stabilization ATTACHMENT A SAMPLE MONITOR RESULTS REPORTING FORM TURBIDITY  WQ MONITORING FORM  Monitoring and Reporting Form for the   Upper Hoh River Bank Stabilization and Culvert Replacement Project       WQ Tester:  Date of last calibration for Turbidity Meter________    Monitoring Point    Sample  Location  Date &  Time Turbidity  Notes (include weather , waterbody flow in cfs, other  observations of waterbody, etc)                                                                                                                                                       Water Quality Monitoring Plan Upper Hoh River Bank Stabilization ATTACHMENT B MONITORING LOCATIONS MAPS 24524 5 2 4 5 2 4 5 2 4 5 2 4 5 245 2 4 5 245 245 2 4 5 245 245 2 4 5 2 4 5 2 4 5 245 245 2 4 5 2 4 5 24 5 245 245 245 245 2 4 5 2 4 5 2 4 5 2 4 5 2 4 5 2 4 5 2 4 5 245 2 4 5 2 4 5 2 4 5 2 4 5 2 4 5 2 4 5 2 45 245 245 245 2 4 5 2 4 5 2 4 5 245 245 250 250 250 250 250 250 250 2 5 0 255 255 2 5 5 25 5 255 255 2 5 5 255 255 255 2 5 5 26 0 260 2 6 0 2 6 0 260 26 0 26 0 260 260 2 6 0 260 260 260 260 26 0 2 6 0 260 2 6 0 26 0 2 6 0 2 6 0 26 0 2 6 0 260 26 0 260 260 260 2 6 0 2 6 0 2 6 0 2 6 0 2 6 0 2 6 0 2 6 0 2 6 0 260 2 6 0 2 6 0 2 6 0 260 2 6 0 2 6 0 260 260 260 2 6 0 260 2 6 0 260 260 2 65 265 26 5 2 6 5 2 6 5 2 6 5 265 265 2 4 0 240 245 24 5 24 5 2 4 5 245 245 245 2 4 5 245 2 45 245 2 5 0 250250 2 5 0 2 5 0 250 2 5 0 2 5 0 250250 250 2 5 0 2 5 0 2 5 0 250 250 250 250 250 250 2 5 0 250 2 5 0 2 5 0 2 50 255 255 255 255 255 255 255 255 255 2 5 5 260 260 260 260 260 26 0 260 260 260 265 265 265 265 265 2 6 5 265 265 265 265 270 270 2 7 0 270 270 270 270 270 270 270 270 27 0 2 7 0 2 7 0 2 7 0 2 7 0 270 275 275 275 2 7 5 275 275 275 2 7 5 275 275 275275 280 280 2 8 0 280 280 280 280 2 8 0 280 280 280 285 2 8 5 285 285 285 285 2 85 2 8 5 285 285 285 28 5 29 0 290 290 2 9 0 290 290 290 290 290 2 9 5 295 295 295 3 00 300 300 300 305 305 30 5 3 1 0 310 321 CP 14101 CP 14102 BEGIN PROJECT El= 266.89 E= 814,443.431 N= 318,075.887 9+62.52 UPPER HOH RIVER ROAD WA JEFF 91420(1) El= 259.98 E= 815,019.639 N= 318,061.255 15+39.03 UPPER HOH RIVER ROAD WA JEFF 91420(1) SUSPEND PROJECT UP T T T UP CP 14105 RESUME PROJECT El= 269.92 E= 816,549.507 N= 318,249.233 30+93.41 UPPER HOH RIVER ROAD WA JEFF 91420(1) 1 0 1 5 3 0 3 5 N N F.3 STATE PROJECT NUMBER SHEET ] U S _ S u r _ f t 2 D [ c : \ m y f i l e s \ p w _ p r o d u c t i o n \ d 0 2 0 3 2 2 7 \ w a - a 2 0 1 3 0 2 0 _ d b . d g n WA JEFF 91420 (1) 1 2 : 5 0 P M 1 8 A p r il 2 0 1 7 C . C o n r a d - - / - - - - 1 0 / 2 0 1 6 C h e c k e d b y : D e s i g n e d b y : 10+00 TO 39+00 CONTROL PLAN EROSION/SEDIMENT LEGEND 1 5 3 0 3 5 HOH RIVER HOH RIVER Roadway Obliteration Inlet Protection Filter Rock Check Dam Silt Fence Flow Arrow 7 0 % P L A N I N H A N D 0 4 - 1 8 - 2 0 1 7 POC1 - Sample 300' d/s of construction within flow along the right bank. B1 - Sample 50-100' u/s of construction within flow along the right bank. POC2 - Sample 300' d/s of construction within flow along the right bank. 245 2 4 5 2 4 5 245 245 245 2 4 5 2 4 5 245 2 4 5 245 2 4 5 245 250 250250 250 250 250 2 5 0 250 2 5 0 250 2 5 0 2 5 0 255 255 255 255 2 5 5 255 255 255 2 5 5 2 5 5 260 260 260 260 260 260 260 2 6 0 265 265 265 265 265 265 265 265 265 265 265 270 2 7 0 270 2 7 0 270 270 270 270 270 2 7 0 270 275 275 275 275 275 275 275 275 280 280 280 280 280 2 8 0 280 280 285 285 285 2 8 5 285 285 285 28 5 285 290 290 290 29 0 2 90 2 9 0 290 290 2 9 0 29 5 2 9 5 295 295 295 2 9 5 295 295 295 30 0 300 300 300 3 0 0 3 0 0 300 300 300 305 305 305 3 0 5 305 30 5 3 05 305 31 0 310 3 1 0 31 0 310 310 3 1 5 315 315 3 1 5 3 2 0 320 3 2 0 325 325 330 3 3 0 330 335 340 340 3 45350 355 35 5 3 6 0 245 24 5 2 4 5 2 4 5 2 4 5 2 4 5 245 245 245 2 4 5 2 5 0 2 5 0 2 5 0 2 5 0 2 5 0 2 5 0 2 5 0 250 250 250 250 250 250255 255 255 255 255 255 255 2 5 5 2 55 255 2 6 0 260 2 6 0 2 6 0 260 260 260 260 2 6 0 260260 265 265 265265 265 2 6 5265265 265 265 2 6 5 2 6 5 2 6 5 270 270 270270 27 0 2 7 027027027 0 270 27 5 275 275 275 2 7 5 2 7 5 2 7 5 275 2 7 5 275275275 280 280 280 280 2 8 0 280 28 0280280 2 8 0 280 285285 285285 2 8 5 2 85 285285285 2 8 5 285 290 29 0 29 0 290 29 0 2 9 0 290 290 290 2 9 0 295 2 9 5 2 9 5 29 5 295 295 295 295 29 5 300 3 0 0 300 300 3 0 0 3 00 300 300 3 0 0 3 05 3 0 5 305 305 3 0 5 3 0 5 305 30 5 30 5 310 310 3 1 0 3 1 0 310 3 1 0 310 315 315 315 3 1 5 31 5 315 3 1 5 3 1 5 320320 320 3 2 0 3 2 0 320 320 32 0 32 5 325 325 325 3 2 5 3 2 5 32 5 3 2 5 33 0 330 3 3 0 330 3 3 0 330 335 335 335 3 3 5 3 3 5 3 3 5 3 3 5 33 5 34 0 340 3 4 0 3 4 0 3 4 0 34 0 3 45 345 345 3 4 5 3 4 5 345 345 350 3 5 0 3 5 0 35 0 3 55 355 3 5 5 360 3 6 0 36 0 360 3 6 5 3 6 5 36 5 370 37 5 375 3 7 5 3 8 0 380 385 3 9 0 40 0 260 265265 265265 265 2 6 5 270 270270270275275280280285285 UP UP UP T T T 14107 CP TT T CP 14106 Clearing limits Clearing limits SUSPEND PROJECT El= 263.11 E= 818,510.379 N= 317,242.985 53+48.89 WA JEFF 91420(1) 4 0 4 5 5 0 N N F.4 STATE PROJECT NUMBER SHEET ] U S _ S u r _ f t 2 D [ c : \ m y f i l e s \ p w _ p r o d u c t i o n \ d 0 2 0 3 2 2 7 \ w a - a 2 0 1 3 0 2 0 _ d c . d g n WA JEFF 91420 (1) 1 2 : 5 3 P M 1 8 A p r il 2 0 1 7 C . C o n r a d - - / - - - - 1 0 / 2 0 1 6 C h e c k e d b y : D e s i g n e d b y : 37+00 TO 54+00 CONTROL PLAN EROSION/SEDIMENT LEGEND HOH RIVER HOH RIVER Check dam (Filter rock) 47+81 to 49+31 Lt Check dam (Filter rock) 49+70 to 50+80 Lt Silt fence 47+81 to 50+79 RT Silt fence 49+22 to 49+39 LT Silt fence 49+71 to 49+84 LT Roadway Obliteration Inlet Protection Filter Rock Check Dam Silt Fence Flow Arrow 70 % PL A N IN HA N D 04 - 1 8 - 2 0 1 7 B2 - Sample 50-100' u/s of construction within flow along the right bank. D2 - Sample at ditch discharge point POC5 - Sample d/s of construction and u/s of Hoh River confluence. B5 - Sample 50' u/s of construction Un n a m e d Tr i b u t a r y D1 - Sample at ditch discharge point 7 . 2 5 8 2 % 0 . 8 0 1 2 % 7 0 7 5 320320 3 2 5 3 3 0 3 3 0 3 3 5 335 3 3 5 3 4 0 34 0 3 4 0 34034 0 345 345 3 4 5 3 4 5 350 350 3 5 0 3 5 0 3 50 3 5 0 3 5 0 355 3 5 5 3 55 355 355 355 355 360 360 360 360 36 0 365 365 370 370375 3 1 0 315 31 5 31 5 3 1 5 315 3 1 5 3 1 5 315 315 31 5 315 315 315 3 1 5 3 1 5 3 1 5 315 315 3 1 5 31 5 315 315 3 1 5 31 5 3 1 5 3 1 5 31 5 315 3 1 5 31 5 3 1 5 31 5 315 315 31 5 32 0 32 0 320 320 320 320 320 3 2 0 32 0 320 320 320 3 2 0 3 2 0 32 0 3 2 0 32 0 32 0 3 2 0 32 0 32 0 32 0 32 0 32 0 320 3 2 5 325 3 2 5 325 325 3 2 5 325 32 5 3 25 32 5 325 325 325 32 5 3 2 5 32 5 3 2 5 3 2 5 325 32 5 32 5 32 5 3 2 5 325 32 5 32 5 325 32 5 3 2 5 330 33 0 3 3 0 330 3 3 0 33 0 330 3 3 0 330 330 3 3 0 3 30 3 3 0 330 3 3 0 330 3 3 0 33 5 3 3 5 3 3 5 335 33 5 335 335 3 3 5 3 3 5 335 3 3 5 3 3 5 3 3 5 335 335 34 0 3 4 0 3 4 0 340 340 340 3 4 0 3 4 0 3 4 0 34 0 340 340 34 0 340 340 34 0 340 34 5 3 4 5 3 4 5 345 345 34 5 3 4 5 3 4 5 345 34 5 3 4 5 350 3 5 0 3 5 0 350 3 5 0 3 5 0 35 0 3 5 0 350 350 350 3 5 0 3 5 0 3 5 0 3 5 0 3 5 0 35 0 35 0 35 0 3 55 3 5 5 355 355 3 5 5 3 5 5 355 3 5 5 3 5 5 3 5 5 355 355 3 5 5 355 3 5 5 3 5 5 36 0 36 0 360 360 3 6 0 3 6 0 360 3 6 0 360 3 6 0 3 60 365 3 6 5 365 36 5 365 3 6 5 3 6 5 3 6 5 3 6 5 370 370 3 7 0 370 37 0 370 370 37 0 370 370 375 375 375 375 375 375 37 5 3 7 5 375 375 3 8 0 38 0 380 3 8 0 380 380 3 8 0 380 3 8 5 38 5 3 85 385 38 5 385 3 9 0 3 9 0 390 3 90 39 0 3 9 5 3 9 5 395 395 3 95 4 0 0 4 0 0 40 0 4 00 400 4 0 5 4 0 5 4 05 405 405 4 1 0 4 1 0 410 410 41 5 4 1 5 41 5 415 4 2 0 42 0 4 2 0 4 20 42 0 4 2 5 425 425 4 3 0 430 430 4 3 5 435 43 5 4 4 0 440 4 4 0 4 4 5 44 5 4 4 5 4 5 0 4 50 4 5 5 45 5 4 60 460 4 65 4 6 5 470 4 70 47 0 N Clearing limit Clearing limit Clearing limit Clearing limit HOH RIVER Silt fence 71+00 to 76+99 Rt. Silt fence 77+80 to 85+00 Rt. rolled erosion control product Filter rock check dams with 72+85 to 75+50 Lt. Silt fence 77+61 Lt./Rt. 77+34 Lt./Rt. Filter rock check dams 78+55 to 80+75 Lt. F.5 STATE PROJECT NUMBER SHEET ] U S _ S u r _ f t 2 D [ c : \ m y f i l e s \ p w _ p r o d u c t i o n \ d 0 2 0 3 2 2 7 \ w a - a 2 0 1 3 0 2 0 _ d d . d g n WA JEFF 91420(1) 1 2 : 4 2 P M 1 3 A p r il 2 0 1 7 C . C o n r a d - - / - - - - 0 1 / 2 0 1 7 C h e c k e d b y : D e s i g n e d b y : 71+00 to 79+00 CONTROL PLAN EROSION/SEDIMENT LEGEND Roadway Obliteration Inlet Protection Filter Rock Check Dam Silt Fence Flow Arrow 7 0 % P L A N I N H A N D 0 4 - 1 8 - 2 0 1 7 B6 - Sample 50' u/s of construction POC6 - Sample 200' d/s of construction or just u/s of Hoh River confluence. D3 - This is a temporary flow line along the silt fence. Sample at end of fence. D4 - Sample at ditch discharge point D5 - Sample at ditch discharge point 315 3 1 5 3 15 315 3 1 5 3 1 5 3 1 5 3 1 5 31 5 3 1 5 315 3 1 5 315 315 315 315 3 1 5 31 5 3 1 5 31 5 315 315 315 315 315 315 3 1 5 315315 3 1 5 3 1 5 31 5 3 1 5 315 3 1 5 315 315 315 315 315 320 320 320 325 325 325 330 3 3 0 33 0 33 5 335 335 340 3 4 0 340 3 4 0 340 340 345 345 345 345 3 5 0 350 350 3 5 5 3 55 355 355 3 6 0 360 360 3 6 0 360 3 6 5 365 3 6 5 365 365 365 3 7 0 370 3 7 0 370 3 7 5 3 7 5 3 8 0 380 38 5 3 8 5 385 390 390400410 420 330 335 3 3 5 340 345350 355 355 35 5360 360 3 1 0 310 310 3 1 0 3 1 0 3 1 0 310 310 31 0 310 310 3 1 0 3 1 0 3 1 0 3 1 0 3 1 0 310 3 1 0 31 0 3 1 0 31 0 3 1 0 3 1 0 3 1 0 310 3 1 0 310 3 10 3 1 0 3 1 0 3 1 0 3 1 0 3 1 0 3 1 0 31 0 3 1 0 3 1 0 3 1 0 3 1 0 3 1 0 310 3 1 0 31 5 3 1 5 3 1 5 315 315 315 315 315 31 5 3 1 5 3 2 0 320 320 320 320 320 320 320 325 325 3 2 5 325 325 325 3 3 0 330 330 330 330 3 3 0 3 3 0 3 3 0 335 33 5 335 335 335 335 3 3 5 340 3 4 0 3 4 0 340 340 340 3 4 0 3 4 0 3 4 0 3 4 5 345 3 4 5 3 4 5 345 345345 345 3 4 5 35 0 350 350 3 5 0 350 3 5 0 3 5 0 3 5 5 355 355 355 355 3 5 5 360 360 360 3 6 0 36 0 3 6 5 3 6 5 36 5 365 365 365 365 3 6 5 365 3 7 0 370 3 7 0 370 370 3 7 0 370 370 370 3 7 0 3 7 5 375 375 375 3 7 5 375 375 3 7 5 3 8 0 3 8 0 380 380 3 8 0 380 380 3 8 5 3 8 5 385 385 385 385 385 3 9 0 390 390 390 390 390 3 9 0 3 9 0 3 9 5 395 395 395 39 5 3 9 5 40 0 400 400 400 4 0 5 405 405 410 410 410 415 420 4 2 5 4 3 0 N N 8 0 500 8 5 9 6 9 8 F.6 STATE PROJECT NUMBER SHEET ] U S _ S u r _ f t 2 D [ c : \ m y f i l e s \ p w _ p r o d u c t i o n \ d 0 2 0 3 2 2 7 \ w a - a 2 0 1 3 0 2 0 _ d e . d g n WA JEFF 91420(1) 1 2 : 4 1 P M 1 3 A p r il 2 0 1 7 C . C o n r a d - - / - - - - 0 1 / 2 0 1 7 C h e c k e d b y : D e s i g n e d b y : 79+00 to 85+00 CONTROL PLAN EROSION/SEDIMENT 96+00 to 98+60 CONTROL PLAN EROSION/SEDIMENT LEGEND LEGEND Clearing limit Clearing limit Clearing limit HOH RIVER HOH RIVER Silt fence 77+80 to 85+00 Rt. Filter rock checkdams 78+55 to 80+75 Lt. Roadway Obliteration Inlet Protection Filter Rock Check Dam Silt Fence Flow Arrow Roadway Obliteration Inlet Protection Filter Rock Check Dam Silt Fence Flow Arrow 70 % PL A N IN HA N D 04 - 1 8 - 2 0 1 7 POC3 - Sample 300' d/s of construction within flow along the right bank. POC4 - Sample 300' d/s of construction within flow along the right bank. B3 - Sample 50-100' u/s of construction within flow along the right bank. B4 - Sample 50-100' u/s of construction within flow along the right bank. D6 - Sample at ditch discharge point 380 380 3 8 0 3 8 0 38 0 3 8 0 385 38 5 3 8 5 3 8 5 385 385 385 3 9 0 390 390 390 3 9 0 390 390 39 0 395 395 3953 9 5 395 395 395 4 0 0 400 400 4 0 0 4 0 0400 4 0 0 400 4 0 0 40 0 4 0 0 400 40 5 4 0 5 4 0 5 405 4 0 5 4 0 5 405405 405 405 4 0 5 4 0 5 4 0 5 4 0 5 4 0 5 4 0 5 4 0 5 4 05 410 4 1 0 410 410 410 410 410 4 1 0 4 10 4 1 0 4 1 0 4 1 0 4 1 0 4 1 0 4 1 0 4 1 0 4 1 0 415 4 1 5 4 1 5 415 415 415 41 5 41 5 415 4 1 5 4 1 5 4 1 5 4 1 5 4 1 5 4 1 5 4 1 5 415 420 42 0 4 2 0420 420 4 2 0 420 4 2 0 4 2 0 420 4 2 0 42 0 4 20 4 2 0 4 2 0 4 2 0 420 4 2 0 4 2 0 4 2 0 420 4 2 0 4 2 0 4 2 0 4 2 0 4 2 0 420 4 2 5 425 425 425 425 4 2 5 425 425 425 42 5 4 2 5 4 2 5 4 2 5 425 425 425 4 3 0 430 430 430 4 3 0 43 0 4 30 43 0 4 3 0 4 3 0 4 3 0 4 3 0 430 4 3 0 4 30 4 3 0 4 3 0 43 0 4 3 0 4 3 0 43 0 435 435 435 435 435 435 435 4 3 5 4 3 5 4 3 5 43 5 435 4354 3 5 435 4 3 5 43 5 4 3 5 435 4 3 5 43 5 4 3 5 440 4 4 0 440 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 44 0 4 4 0 44 0 445 445 445 4 4 5 4 4 5 44 5 4 4 5 4 4 5 44 5 4 4 5 4 4 5 44 5 45 0 45 0 4 5 0 4 5 0 4 5 0 4 5 0 4 5 0 4 5 0 4 5 0 4 50 4 5 0 450 4 5 0 4 5 0 4 50 45 0 45 0 45 0 4 5 0 4 50 45 0 450 4 5 5 4 5 5 45 5 455 4 55 455 455 455 460 4 6 0 460 460 460 465 4 6 5 465 46 5 470 4 70 470 4 7 5 4 7 5 475 48 0 4 8 0 4 8 0 480 4 8 0 480 485 4 8 5 4 8 5 4 8 5 48 5 485 48 5 485 48 5 485 485 485 4 8 5 485 4 8 5 485 4 8 5 4 9 0 4 9 0 4 9 0 49 0 490 4 9 0 3 9 0 395 4 0 0 4 0 0 4 0 5 4 0 5 405 405 4 1 0 4 1 0 41 0 4 1 5 4 1 5 415 4 2 0 4 2 0 420 4 2 5 425 4 2 5 4 2 5 4 2 5 430 430 4 3 0 4 3 0 4 3 0 4 3 5 4 3 5 4 3 5 43 5 4 35 440 440 440 445 445 445 445 450 450 455 455 455 460 460 460 465 465 465 465 4 6 5 470 470 470 4 7 0 475 475 475 480 480 480 485 485 485 N k e e r C n o y n a C rolled erosion control product Filter rock checkdams with 103+00 to 107+52 Lt. Filter rock check dams 110+42 to 112+40 Clearing limit Silt fence 103+00 to 108+68 Rt. Silt fence 109+30 Lt./Rt. 108+51 Lt/Rt. Silt fence 107+47 to 108+49 Lt. Silt fence 109+29 to 110+43 Lt. Silt fence 109+11 to 110+22 Rt. rolled erosion control product Filter rock checkdams with 701+19 to 702+17 Lt. rolled erosion control product Filter rock checkdams with 700+46 to 701+20 Rt. control product checkdams with rolled erosion 700+22 to 700+45 Lt. Filter rock 1 0 5 70 0 1 1 0 F.7 STATE PROJECT NUMBER SHEET ] U S _ S u r _ f t 2 D [ c : \ m y f i l e s \ p w _ p r o d u c t i o n \ d 0 2 0 3 2 2 7 \ w a - a 2 0 1 3 0 2 0 _ d f . d g n WA JEFF 91420(1) 1 2 : 4 0 P M 1 3 A p r il 2 0 1 7 C . C o n r a d - - / - - - - 0 1 / 2 0 1 7 C h e c k e d b y : D e s i g n e d b y : 103+00 to 112+00 CONTROL PLAN EROSION/SEDIMENT LEGEND rolled erosion control product Filter rock check dams with 701+60 to 702+17 Rt. Roadway Obliteration Inlet Protection Filter Rock Check Dam Silt Fence Flow Arrow 7 0 % P L A N I N H A N D 0 4 - 1 8 - 2 0 1 7 B7 - Sample 50' u/s of construction POC7 - Sample 200' d/s of construction or just u/s of Hoh River confluence. D7 - Sample at ditch discharge point D8 - Sample at ditch discharge point D9 - Sample at ditch discharge point D10 - Sample at ditch discharge point D11 - Sample at ditch discharge point 380 3 8 0 3 8 0 380 380 3 8 5 38 5 38 5 390 39 0 390 395 39 5 39 5 395 4 0 0 40 0 40 0 40 0 400 4 0 0 4 0 0 4 0 0 4 0 5 405 405 40 5 4 0 5 4 0 5 4 1 0 410 410 410 415 4 15 41 5 4 1 5 420 4 2 0 42 0 42 0 4 2 5 42 5 42 5 425 425 4 2 5 4 2 5 4 2 5 430 430 4 3 0 4 3 0 430 4 3 0 430 430 4 3 0 4 3 0 4 3 0 4 3 0 4 3 0 4 3 0 4 3 0 4 3 0 4 3 0 4 3 0 4 3 5 4 3 5 435 435 4 3 5 4 3 5 435 4 3 5 4 3 54 3 5 435 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 435 4 3 5 435 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 4 3 5 440 440 4 4 0 4 4 0 4 4 0 440 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 4 4 0 44 5 44 5 4 4 5 445 445 4 4 5 4 4 5 4 4 5 4 4 5 4 4 5 4 4 5 445 4 4 5 4 4 5 4 4 5 4 4 5 4 5 0 450 4 5 0 450 45 0 455 455 460 4 3 0 4 3 0 435 4 3 5 4 3 5 435 4 3 5 435 4 4 0 4 4 0 4 4 5 445 N 1 1 5 Clearing limit Clearing limit rolled erosion control product Filter rock checkdam with 111+40 to 112+63 Rt. F.8 STATE PROJECT NUMBER SHEET ] U S _ S u r _ f t 2 D [ c : \ m y f i l e s \ p w _ p r o d u c t i o n \ d 0 2 0 3 2 2 7 \ w a - a 2 0 1 3 0 2 0 _ d g . d g n WA JEFF 91420(1) 1 2 : 3 9 P M 1 3 A p r il 2 0 1 7 C . C o n r a d - - / - - - - 0 1 / 2 0 1 7 C h e c k e d b y : D e s i g n e d b y : 112+00 to 117+03.39 CONTROL PLAN EROSION/SEDIMENT LEGEND Filter rock check dams 112+71 to 117+02 Lt. Filter rock check dams 112+63 to 117+02 Rt. Roadway Obliteration Inlet Protection Filter Rock Check Dam Silt Fence Flow Arrow 70 % PL A N IN HA N D 04 - 1 8 - 2 0 1 7 D12 - Sample at ditch discharge point D13 - Sample at ditch discharge point Water Quality Monitoring Plan Upper Hoh River Bank Stabilization ATTACHMENT C ENVIRONMENTAL COMMITMENTS (as identified in the project Final EA) Water Quality Monitoring Plan Page | 1 Upper Hoh River Bank Stabilization Attachment C Upper Hoh River Road Bank Stabilization and Culvert Replacement Project Environmental Commitments WFLHD, in partnership with Jefferson County, will construct two complementing mitigation projects designed to improve long-term aquatic habitat conditions in the project area along the mainstem Hoh River. In addition to these two mitigation projects discussed in more detail in the Final EA, the following mitigation commitments will also be implemented as components of the proposed project:  Conduct construction activities outside of critical nesting times for sensitive species, where feasible, including critical nesting seasons for marbled murrelet (April 1 to September 23) and Northern spotted owl (March 1 to September 30);  Conduct construction activities outside of critical spawning times for Chinook and steelhead salmon, where feasible;  Utilize stream flow diversion, bypass, and fish exclusion methods at Tower Creek and Canyon Creek to minimize downstream sedimentation impacts;  Implement all reasonable and prudent resource protection measures identified during Endangered Species Act (ESA) consultation, and as prescribed by USFWS in the Biological Opinion;  Adhere to all conditions in issued permits and approvals (e.g., Hydraulic Project Approval, Clean Water Act [CWA] Section 404 Permit, CWA Section 401 Water Quality Certification, CWA Section 402 Construction Stormwater General Permit, Shoreline Substantial Development Permit); and  Justly compensate property owners for temporary construction easements or permanent property acquisitions, according to the Uniform Relocation Assistance and Real Property Acquisition Policies for Federal and Federally Assisted Programs (42 USC Chapter 61). These specific measures would be implemented as part of construction:  Stabilize cleared ground as necessary to prevent erosion, particularly on slopes adjacent to the Hoh River or its tributaries;  Employ standard best management practices (BMPs) at all project sites during construction as required by the project Construction Stormwater General Permit. BMPs would minimize the release of turbid water from the construction site, in order to protect water quality, and would follow current permit requirements for erosion and sediment control;  BMPs related to stormwater and erosion control will be implemented prior to construction and maintained throughout construction and until vegetation is established:  Develop a Hazardous Material Spill Plan prior to construction; in the event of a hazardous material spill, ensure that the contractor responds in compliance with the spill plan; Water Quality Monitoring Plan Page | 2 Upper Hoh River Bank Stabilization Attachment C  Implement dust control measures (e.g., apply water) as needed during construction;  Coordinate with utility owners to minimize service interruptions and provide advance notice of service interruptions to affected parties;  To the extent possible, avoid direct impacts to power and telephone lines, poles, and related structures during construction;  If avoidance of utilities is not feasible, work with utility providers to temporarily relocate utility infrastructure;  Ensure outages will not last more than four hours;  Apply black cottonwood bark-like concrete form-liner texture to dolosse, instead of smooth finish, to help the structures better blend into the environment;  Place signage in advance of and during construction to inform the public in advance;  Ensure all equipment has muffled exhaust and has sound control devices no less effective than those provided on the original equipment;  Ensure all equipment complies with pertinent Environmental Protection Agency noise standards and the Jefferson County Code;  Shut off idling equipment whenever possible;  If a specific noise complaint is anticipated due to noisy construction, notify nearby residents in advance of such work or install temporary acoustic barriers around stationary noise sources, if possible;  Coordinate temporary traffic control devices to provide the least impact to motorized users;  Position equipment to maintain access to local properties along the construction corridor;  Use flaggers and temporary battery- or solar-powered traffic signals to maintain access during long-term road closures;  Provide pilot cars to guide residents or parks visitors through construction zones, as appropriate during lane closures;  Coordinate with Olympic National Park so that notice of the Upper Hoh River Road (UHRR) closure is posted on ONP’s website;  Limit removal of mature trees greater than 21 inches dbh to those whose removal is necessary for construction;  For the ELJ/dolosse units, source logs from outside the project area;  Maintain fire and emergency services access during construction;  Develop specific emergency procedures prior to the potential winter road closure and implement them if emergency vehicle passage is required during road closure;  Coordinate with residents to the extent practical to ease access during construction; and Water Quality Monitoring Plan Page | 3 Upper Hoh River Bank Stabilization Attachment C  Coordinate with the local school district to ensure students are served during the winter road closure. The contractor will implement the following measures after construction and during re- vegetation:  After ELJ/dolosse unit placement, restore disturbed areas, including stream buffers, at a 1:1 impact-to-mitigation ratio; restoration would include re-planting (1) vegetation salvaged from the site, and (2) supplemental plantings from native nursery stock;  Monitor restored planting sites for at least five years to ensure successful re-vegetation;  Use at least 5-gallon size trees when planting the riparian zone to speed up establishment;  Revegetate all streambanks and riparian areas temporarily disturbed by bank stabilization activities with native coniferous and deciduous trees;  Use an FHWA-approved native seed mixture;  Place only certified weed-free mulch and straw bales;  Ensure all equipment used in the project area is free of weed seed;  Take precautions to prevent introduction and spread of weeds caused by moving weed- infested material;  Notify and or coordinate vegetation management activities with land owners within or adjacent to the transportation right-of-way (ROW) that is proposed for treatment;  Design cut-slopes to take advantage of natural rock and soil material characteristics as they are encountered;  Design cut-slopes in soil or granular materials to be as flat as practicable to minimize ravel, surface erosion, and slope instability, and to promote re-vegetation while maintaining an acceptable level of slope stability;  Conserve and stockpile topsoil for later use to enhance revegetation success;  Use locally native plants to improve the revegetation rate; and  Stake straw wattles where appropriate.