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HomeMy WebLinkAboutExhibit 26-08 SubmittalDonna Frostholm From: Gourley, Christina L (DFW) <Christina.Gourley@dfw.wa.gov> Sent: Monday, July 26, 2021 4:33 PM To: Donna Frostholm Subject: Submittal of requested information Attachments: A633181 p jpg; A633181 p_mit jpg; Point Whitney Eelgrass Delineation Update Letter Report.pdf, 20210726HMP_Point_Whitney.pdf; Stormwater Calcs.pdf CAUTION: This email originated from outside your organization. Exercise caution when opening attachments or clicking links, especially from unknown senders. Hello Ms. Frostholm, Attached you will find the requested information for the upcoming proposed project at Point Whitney. In a letter dated April 20, 2021, Jefferson County requested additional information to be received by June 20, 2021. The County then granted an extension to the submittal and WDFW appreciates the understanding of the County in this matter. The following are submitted for your review: Request Document Titles Revised plan sheets to show OHWM A633181p & A633181p_mit Revised Eelgrass Memo Point Whitney Eelgrass Delineation Update Letter Report Habitat Management Plan 20210726HMP Point Whitney Stormwater Calculations Worksheet Stormwater Calcs If any revisions are required or any code has not been met with these documents, please let me know as soon as possible and we will resubmit documentation. I appreciate your help and understanding and look forward to continuing to work with you on this project and into the future. Thank you, C1 r&k (�O w'ley Environmental Planner Permitting Lead Capital and Asset Management Program Washington Department of Fish & Wildlife CELL: (360) 790-3118 Pronouns: she/her 0 N w�SEE Urn"TM PLAN SHEET 7 cql MLLw 0.00 ML,Lw 0.00 i� OHW • 12.00 CHAN LANK FENCE GRAVEL f r OF P EDGE WO Lot `� l GRAM ROAD �y LACO r . PROPOSED SITE PLAN WALE: , - 100 APPI X 13,2" VEOETA`PON LJW 1 o _ ct �7 1� O 27` SCALE: 1' - 100' ARQUM WOW AIMA A5 NEEDED PER SHED 8. 2. 11QF T*N VM OOD CANAL COOKINATING OOUNM U PROM M 'M DE OEtIr•>er lmm MATCH EXISMO �O PA WD11G AREA--------------------- • - 4 • i V+ W En R� ��y�� nee n�y-� ��y�� LEVA " lF RES ORA RA1 y f• f•• Y F. v 4 SET BY IRIITCHIr4G THE TOP EDGE OF EX • ` + • • RELOCATED OF ORAViL/►IECETATION LIME GRAVEL LOT • y 1 • • • . r 4X8 PICNIC THE npERE PPff TO • .r1 Y REWVW • ` ♦ ♦ 900 5F , • ' • GRAVEL PAWNG • WTIGAT" AREA . • Af�EA EXCAVATE TO EXISIVQ EM ATI0M • • N • y 20' WRITER LOG SLOPE TRAHSTTlr+H AT r COfMR. FILL REINOVAL -y 77 _ SHALL NOT DISMR8 ANY EXIST G RIP RAP 12' SECTION OF _ CMNUw FEMCE—_- 6' cHMUNK TO K REMOVED 1 .rFKE 1IHMW 11;s . � 55 riuw aoo GWENGINEERS� 1101 South Fawcett Avenue, Suite 200 Tacoma, Washington 98403 253.383.4940 June 22, 2021 Washington Department of Fish and Wildlife 600 Capital Way North Olympia, Washington 98501 Attention: Mike Nicholas Subject: Eelgrass Delineation Point Whitney Access Redevelopment Jefferson County, Washington Project No. 3730-167-02 INTRODUCTION GeoEngineers, Inc. (GeoEngineers) was retained by Washington Department of Fish and Wildlife (WDFW) to perform an updated eelgrass delineation at the Point Whitney Access Site. WDFW is planning to widen the existing boat ramp by 2 feet and install 4 feet of ArmorFlex on either side. WDFW requested GeoEngineers conduct a new delineation because the previous delineation conducted by GeoEngineers in 2018 is over 3 years old and is no longer accepted under U.S. Army Corps of Engineers (Corps) eelgrass delineation guidance: Components of a Complete Eelgrass Delineation and Characterization Report (date January 9, 2018). This letter report documents the survey methods, and resulting extent and location of existing eelgrass beds found in the vicinity of the boat launch. Assessing and mitigating potential impacts to delineated eelgrass was not included as pan: of this scope. SCOPE AND METHODS The scope of work included conducting a Tier 1 eelgrass boundary survey surrounding the boat launch as the project is being designed to avoid impacts to eelgrass beds. GeoEngineers coordinated the site visit during low tides which allowed eelgrass within the project vicinity to be mapped through a combination of wading and snorkel survey techniques. The site visit was conducted on Monday, June 14, 2021 and completed in 1 day. Low tide occurred at 2:11 PM, at an elevation of -1.65 feet mean lower low water (MLLW) (Station 9445293 - Pleasant Harbor). Underwater visibility was estimated at approximately 7 feet prior to disturbing substrate. The survey team consisted of three GeoEngineers' scientists: Adam Wright and Emily Hum completed the snorkel survey and Shawn Mahugh provided shore support. All three have extensive experience in shore - based eelgrass and macroalgae identification and delineation. Mapping was conducted with a Trimble GeoXH global positioning system (GPS) unit. Following differential correction post -processing, over 97 percent of points collected were reported to have between 5 and 15 centimeter (cm) accuracy. Washington Department of Fish and Wildlife June 22, 2021 Page 2 Eelgrass was primarily mapped by wading a single transect parallel to the waterline (Method 1), directly marking the eelgrass boundaries with the GPS ensemble. Points were collected every 5 to 15 feet as needed to capture the boundary geometry. A continuous bed of eelgrass was readily visible in less than 2 feet of water along much of the shoreline. Around the existing ramp the landward eelgrass boundary transitioned into deeper water. To complete the landward distribution of eelgrass mapping in this area one biologist snorkeled the eelgrass edge while a second swimmer remained at the surface with the GPS unit to mark the boundary (Method 2). The project was conducted following Corps guidelines described in Components of a Complete Eelgrass Delineation and Characterization Report (date January 9, 2018). A photographic record of the site has been included as Appendix A, Site Photographs. RESULTS SUMMARY A continuous native eelgrass (Zostera marina) bed was identified and mapped near the existing ramp (Figure 1, 2021 Eelgrass Map). Non-native eelgrass (Zostera japonica) was not encountered at the site. Based on WDFW provided bathymetry, the landward eelgrass bed boundary was mapped to occur at approximately -2 feet MLLW through the majority of the study area. At the ramp location, the bed transitioned to deeper water (approximately -6 feet MLLW) for roughly 25 feet along the beach. Eelgrass meeting the definition for a bed by either Method A or Method B (as defined in Corps guidance) was not observed landward of the mapped boundary shown on Figure 1. Eelgrass observed around the site was generally a continuous bed on either side of the ramp that transitioned to patches of eelgrass spaced less than 1 meter apart near the ramp location. Eelgrass pointfeatures collected by GPS were mapped using Geographic Information System (GIS) software (Figure 1). These features were interpreted into a line delineating the landward eelgrass bed boundary surrounding the ramp. The eelgrass bed extends beyond the mapped boundary laterally along the beach to the east and west. The waterward boundary was not mapped and appeared to extend beyond visibility limitations from the surface. Digital Shapefiles were provided with this report. Sargassum muticum was observed within and adjacent to the eelgrass bed and Desmarestia aculeata was observed shoreward of the eelgrass bed between approximately-2 and 0 feet MLLW. Substrate surrounding the eelgrass was predominantly gravel and sand with fine sediments. Beach substrate above the eelgrass bed quickly transitioned to gravels and cobbles at roughly 0 feet MLLW. LIMITATIONS We have prepared this revised letter report for WDFW. They may distribute copies of this status report to the their authorized agents and/or regulatory agencies as may be required. Within the limitations of scope, schedule and budget, our services have been executed in accordance with methods detailed within this report as prepared. The conclusions, recommendations, and opinions presented in this report are based on our professional knowledge, judgment and experience. No warranty, express or implied, applies to the services or this report. GEOENGINEER� File No. 3730-167-02 Washington Department of Fish and Wildlife June 22, 2021 Page 3 We thank you for the opportunity to work with you on this project. If you have any questions regarding this letter report please contact Joe Callaghan at 253.383.4940. Sincerely, GeoEngineers, Inc. Emily R. Hum Biologist Shawn M. Mahugh, PWS Senior Biologist ERH:ALW:SMMJOC:tlm Attachment: Figure 1.2021 Eelgrass Map Appendix A. Site Photographs Adam L. Wright, PWS Biologist Joseph O. Callaghan, MS, PWS Principal Fisheries Biologist Disclaimer: Any electronic form, facsimile or hard copy ofthe original document (email, text, table, and/orfigure), if provided, and any attachments are only a copy ofthe original document. The original document is stored by GeoEngineers, Inc. and will serve asthe official document of record. Copyright© 2021 by GeoEngineers, Inc. All rights reserved. GMENGINEER� -'�' -61,W Eelgrass extends '-3;0. offsite 16 17 MAM �18 ' Point ID N Latitude W Longitude 1 47.762253 -122.951467 2 47.762245 -122.851422 47.762238 -122.851357 3 4 47.762236 -122.85131 47.762228 -122.851273 5 47.762242 -122.851232 } 6 47.76227 -122.851233 7 47.762297 -122.851216 8 9 47.762299 -122.851187 47.762279 -122.851142 - .. . 10 47.762269 -122.851161 11 12 47.762224 -122.851162 • 13 47.762213 -122.851154 47.7622 47.762185 47.762166 -122.85113 -122.85111 -122.85108 - ~ - _- a 14 15 16 17 18 47.762166 -122.851046 47.762153 -122.851007 i - 19 47.762142 -122.850969 Legend Delineated Eelgrass Boundary ® Boundary Points Eelgrass Existing Ramp ® Proposed Ramp Expansion 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 ofthis communication. Data Source: Aerial from GoogleEarthPro 2017; 2005 WDFW topographic survey. Projection: NAD 1983 StatePlane Washington North FIPS 4601 Feet 2021 Eelgrass Map Point Whitney Eelgrass Delineation Jefferson County, Washington GEOENGINEERS Figure 1 APPENDIX A Site Photographs Site Photographs Point Whitney Eelgrass Delineation Jefferson County, Washington GEOENGINEERS FigureA-1 Photograph 4. Eelgrass (Zosteramarina)and substrate. Site Photographs Point Whitney Eelgrass Delineation Jefferson County, Washington GEOENGINEERS FigureA-2 Photograph 6. Shoreline looking east from end existing boat ramp. Site Photographs Point Whitney Eelgrass Delineation Jefferson County, Washington GEOENGINEERS FigureA-3 Point Whitney Water Access — Habitat Management Plan July 26, 2021 Washington Department of Fish and Wildlife Prepared by Chris Gourley, Environmental Planner As required by Jefferson County Code (JCC) Chapter 18.22 Critical Areas and 18.25 Shoreline Master Program, Article VI. Fish and Wildlife Habitat Conservation Areas (FWHCAs) 18.22.650 requires a Habitat Management Report to be written. In a letter dated April 21, 2021, Department of Community Development Staff Donna Frostholm requested the following Habitat Management Plan (HMP) to fulfill the applicant's and County's obligations for review of the outlined project, submitted by Washington Department of Fish and Wildlife (WDFW) by Chris Gourley, Senior Permitting Planner. 18.22.905 General Requirements (a) The proposed activity, location and dimensions; The project is the Point Whitney boat ramp, which is located at 1000 Point Whitney Road in Brinnon, WA, Jefferson County. From Quilcene, head southwest on US-101 toward Bee Mill Road and turn left onto Bee Mill Road. Continue on Bee Mill Road to Point Whitney Road and follow Point Whitney road to site. The primary purpose of this project is to renovate the Point Whitney boat ramp to address damage to the boat ramp and increase safe user access by providing a ramp that is accessible to the public. The boat ramp is on the western shoreline of Dabob Bay in Puget Sound. The existing boat ramp is located on a short section of northward - facing gravel beach along a coastline that is dominantly east -west oriented. The shoreline exhibits a left to right drift cell direction and within about 600 ft. west of the boat ramp meets a divergence zone combining a right to left drift cell and alluvial fan formed by a low energy lagoon outlet and small tributaries. The boat ramp is located on a barrier spit that is continually recharged by the gravel and sand supply that moves northerly along Point Whitney Tide Lands Beach to the east. Incoming tidal action and substantial wave height experienced by North Puget Sound beaches (Finlayson, 2006) keep importing an abundance of gravel that feeds the barrier spit (Please see Appendix A, Maps 2-3). Due to sediment accrual, the Point Whitney boat ramp is currently unsafe or difficult to use for the public. The proposed project includes installing a new ramp on top of the existing ramp and associated mitigation. Concrete planks will be overlaid on the existing ramp to form a new, wider ramp in the same location. Rods will be placed to level and raise the new ramp and voids will be filled with crushed rock. The new planks are 12 ft. x 4 ft. x 6 in. Existing planks are 10 ft. x 14 in. Four (4) ft. wide articulated concrete mats will be placed on both sides of the ramp and at the foot to provide erosion control to reduce the risk of undermining the ramp. All concrete is pre -cast and keyed into the substrate. The ramp will not be above the grade of the beach at highest use times and will be approximately 6-10 inches above the grade of the current ramp. The mitigation work includes the previously completed restoration of the western edge of the "point" at the west side of the project. Parking area and fill was removed to match the existing grade of vegetation on the site (See Plan Set Sheet 9). The area is expected to revegetate naturally with grasses and low vegetation. This accounts for roughly 900 square feet of mitigation above OHW. In addition, cooperative efforts are underway with the Hood Canal Coordinating Council (HCCC) to utilize the in -lieu fee program established by local partners and supported by Jefferson County. Impacts have been assessed by WDFW and have been proposed to all regulators for this project. HCCC is awaiting information from the applicant and regulators on the requirements for mitigation to offset the impacts outlined below. A Use Plan is being drafted and the council will be provided the plan to consider the mitigation credits to be purchased through the HCCC. Material Location Existing Existing New Total New Net SF Dimension Total SF Dimensionase �NeFDimension Ramp Above HTL2 25' x 10' 250 25' x 12' 300 2' wider, same 50 Planks' length Ramp Planks Below HTL 87' x 10' 870 87' x 12' 1044 2' wider, same 174 length ACM3 Above HTL N/A N/A 25' x 4' 200 25' x 4' x 2 200 x2 (one per side) ACM Below HTL N/A N/A 87' x 4' 696 87' x 4' x 2 696 x2 (one per side) Net increase of material below HTL = Ramp 870 SF Planks + ACM Net increase of material above HTL = Ramp 250 SF Planks + ACM (b) Existing site conditions and property boundaries preferably on a scaled site plan with structures, features and geographic location described and graphically depicted; Uplands adjacent to the public access site include forested areas amidst single-family residences. The beach upland ecotone is nearly continuous -forested or well -vegetated. Within 2 miles of the project area there a few small steep -gradient tributaries creating alluvial fans. The immediate uplands contain a parking lot partially paved and partially graveled. The paved area drains out through the boat launch access. There is minor erosion once the surface run-off engages the beach but does not appear to affect beach habitat. The shoreline to the south of Point Whitney is dominated by a gravel beach that terminates at approximately the high tide line in a steep bluff extending to approximately 50 ft. to 80 ft. above sea level. The average beach slope is 12.5%. Slope increases at the upper portions of the beach. Substrate size increases down slope. The shoreline exhibits a left to right drift cell direction and within about 600 ft. west of the boat ramp meets a divergence zone combining a right to left drift cell and alluvial fan formed by a low energy lagoon outlet and small tributaries. The material here is relatively coarse, ranging in size from gravel to boulders. The northward facing beach interacts with an outlet of a tidal lagoon to the west. The material in the lower portion of the bluffs is relatively resistant interbedded sands and gravels that tilt towards the north. The shoreline directly adjacent to the boat ramp is documented to be much finer than the rest of the shoreline. Results from a wave analysis study conducted by Northwest Hydraulic Consultants indicate that when offshore winds are from the NNW and N directions, waves reach the shore approximately head on and result in cross -shore transport. When the offshore winds are from the NE and southerly directions (SSW, S, and SSE), waves refract and diffract around Point Whitney and travel along the shore from east to west. When waves approach the shore at an angle, a I Pre -cast Concrete Planks 'High Tide Line = 12.7 feet above MLLW 3 Articulated Concrete Mat longshore current will be generated. On this shoreline, east to west sediment transport during the southerly storm event is the dominant factor in the ongoing sand deposition onto the boat ramp. Eelgrass and other seagrasses play a key role in the nearshore ecosystem environments by providing habitat for a wide range of organisms across multiple life stages. Eelgrass beds also help prevent erosion and increase shoreline stability by anchoring seafloor sediment. Eelgrass is a federally -designated Essential Fish Habitat (EFH) and a Habitat of Particular Concern (HPC) under the Magnuson Stevens Fishery Conservation and Management Act of 1996. GeoEngineers completed a seagrass delineation and identified a continuous eelgrass bed near the waterward extent of the boat ramp. An additional technical memo was written to supplement the initial survey after 3 years. Both surveys have been provided to Jefferson County. In Puget Sound, the maximum depth to which eelgrass grows ranges from approximately 1.3 m below the low tide line (MLLW) to greater than 9 m deep. At Point Whitney boat ramp area, the eelgrass beds elevation extent is from -2 ft. to -14 ft. tidal datum. Quilcene-Dabob Pollution Identification and Correction (PIC), which ran from December 1, 2015 to December 31, 2018, had a goal to restore and protect surface waters for shellfish harvest, recreational use, and aquatic life habitat. Marine algal blooms can occur in the Dabob Bay and in 2014 the highest levels of paralytic shellfish poison biotoxins was measured in Washington oysters. Septic system leakage remains a problem in Hood Canal contributing to nutrient loading. Sediment quality was measured in 2004 by the Washington State Department of Ecology as part of the Puget Sound Assessment and Monitoring Program (PSAMP). The areas closest to Point Whitney were found to be intermediate/high quality and intermediate/low quality sediments. Some riprap on site may affect animal migration between upland and the beach. On the back side of the spit, fencing may affect transient wildlife desiring to migrate between the beach and lagoon. To a limited extent, openings in the fence accommodate these foraging behaviors. The foreshore gradient is about 10 —12% towards the upper beach and decreases westward approaching the lagoon alluvial fan. Upland habitats are generally available through forested lands that comprise most of the habitat type above MHHW. The pea gravel/sand mix in the upper tidal elevation of the beach provide ideal spawning habitat for surf smelt. Herring spawning habitat is documented at the project site and southward through Point Whitney Tideland Beach. The eelgrass beds provide a key substrate for herring spawn. Shoreline is rock/gravel substrate transitioning into mudflats moving seaward. Shoreline vegetation is minimal —most of the upland area is part of the boat ramp and existing parking lot and facilities. Substrate shows a segregation by particle size —the further inland, the smaller the particle size. Point Whitney also supports clam and oyster beds as a part of its shoreline. (c) All critical areas and their buffers on the project site; Critical areas shown on the Jefferson County Public Lands Records indicate the following are present on the project site: Critical Area Details as mapped by Jefferson County Riparian Cover Non -Forest; Off -Shore Wetland Wetlands present; NWI mapped as Estuarine intertidal aquatic bed unconsolidated shore regularly flooded (recon done by PWS shows otherwise) Geohazard Areas Shoreline slope stability modified; seismic hazard present Critical Aquifer Recharge Area SUSC Coastal SIPZ <100ppm chloride and % mile from shoreline AE Seawater Intrusion Protection Zone FEMA Flood Zone (d) Assess potential impacts to critical areas function and values per the specific requirements described in this article for each critical area type; Critical areas found on the Jefferson County Public Lands Records indicate that no fewer than six critical areas are found within the Action Area of the work. The Action Area shown in the Biological Assessment includes an area above water surfaces that may be impacted by noise and visual impacts but are not directly impacted with work. Each critical area below has been reviewed and applicable critical areas have been further outlined. Please refer to the Biological Assessment and project applications and drawings for further details on the project specifics including impacts. Critical Area Details as mapped by Jefferson County Riparian Cover Non -Forest; Off -Shore Wetland Wetlands present; NWI mapped as Estuarine intertidal aquatic bed unconsolidated shore regularly flooded (recon done by PWS shows otherwise) Geohazard Areas Shoreline slope stability modified; seismic hazard present Effects on functions and values outline in JCC 18.22 No effects to functions and values as no riparian cover is present within the project footprint. No effects to functions and values as the proposed ramp will be in a previously impacted area with existing boat ramp. In accordance with 18.22.270, the project area is functionally isolated from wetlands present. No effects to functions and values due to structure being placed at or below fluctuating grade, without disrupting existing ramp. Critical Aquifer J SUSC Recharge Area Seawater Intrusion Coastal SIPZ <100ppm chloride Protection Zone and % mile from shoreline FEMA Flood Zone I AE No effects to functions and values due to structure being placed at or below fluctuating grade, without disrupting existing ramp. No effects to functions and values due to structure being placed at or below fluctuating grade, without disrupting existing ramp. No effects to functions and values due to structure being placed at or below fluctuating grade, without disrupting existing ramp. No net rise. The following are further justifications for no effects determinations to functions and values of critical areas due to project work. Riparian Critical Areas Wperen Co er ^PM, 2009) ■ Ciosed Cenopr N—Foreu C] ORShore Other Natural Vegeutvon ■ Wear &* Public Land Records _ I 11. J.eenen—ty. Wnhingmn DCD EH La rHche PW Open Data Portal i4 Riparian cover at the Point Whitney is designated as "non -forest" and "off -shore" based on the maps available. Protection standards 18.22.830(I) require protecting riparian vegetation or tree cover. 18.22.840(c) states that the functions and values relate to the existing amount of shade provided. No shade is provided in this area and thus the function and value of shade is not changing with this project. In addition, no changes are being made to riparian vegetation, so there will be no change in the riparian functions. The proposed ramp will be placed in the same location with an expansion of footprint of roughly 250 square feet, but will not impact riparian cover. F—Wetland Geohazard Public txnd Reowds .a wr..a. x xo eH L. w. ry op. Ps. l%w Te I 1W �1 WY�va _ l According to the National Wetlands Inventory (NWI) Online Mapper, wetlands exist in proximity to the project area. A wetland evaluation was completed by a Kaitlyn Kiehart, PWS, on July 23, 2021. No wetlands were identified within the immediate project area. Man-made, managed ponds are located to the south of the existing boat ramp and estuarine intertidal habitat is located to the south and west. In accordance with JCC 18.22.270 the project area is functionally isolated from these wetlands due to the high level of development associated with the hatchery buildings, roads, and parking lot that surround the boat ramp. Therefore, no impact to functions and values for wetlands or their buffers will result from the redevelopment of the boat ramp. Geohazard areas for the site appear to include seismic hazard and shoreline slope stability of "modified" nature. No areas are mapped as high or moderate geologically hazardous areas within the project area (JCC18.22.510(1)). The potential for seismic hazard on this site is moot due to the height of the proposed structure being at or below the beach grade. No structure requested under this permit will be above the erade of the land. Critical Aquifer Recharge Area Critical Aquifer Recharge Areas are shown on the map for the Point Whitney area. While JCC18.22.930(c) refers to chemical spill potential, no chemicals will be kept on site as part of the facility operations of this public access. Furthermore, there is no change in the use of the public access with the proposed renovation. As no structures will be placed into the ground and will not be of substantial impact to nearby waters, there will be no impact to functions or values of the shown aquifer recharge area. (e) Propose mitigation for unavoidable losses and impacts to critical areas; As shown above, critical areas are not anticipated to be impacted. However, mitigation is proposed for potential shorelines impacts, as well as to offset impacts as required by the US Army Corps of Engineers and the WDFW. In -water work will only be allowed from July 16 to October 14 for the protection of salmon, sand lance and bull trout. All work below the MHHW will occur in the allowable work window. A portion of the area to the west of the boat ramp has been restored to a lower grade to match the vegetation line by removing sediment and relocating placed objects (picnic table and fire pit). Approximately 900 sq. ft. has been restored and is designated a part of this mitigation area. In addition, the HCCC will be providing mitigation in -lieu fee credits for future mitigation occurring in the greater Hood Canal area. Once compensatory mitigation has been agreed upon by regulators, the HCCC will draft a Use Plan outlining specifics of mitigation. It is the intent of WDFW to mitigate for impacts as necessary with each regulator. WDFW has agreed to the mitigation that has already been completed on the west point. Currently, the US Army Corps of Engineers is expecting to require mitigation for impacts below the HTL of 870 square feet. If the county believes that compensatory mitigation is required that does not overlap with these jurisdictions (i.e. above MHHW or OHWM not already covered by WDFW HPA requests), this will be taken into account in the in -lieu fee calculations for credits required for purchase. (f) Identify amount of and limits of clearing, grading, and impervious surface on a stormwater calculation worksheet, if applicable; and The clearing limits are limited to the extent required to install the new planks and the articulated concrete mats, per plans. A stormwater worksheet has been submitted with this report in conjunction with this application. (g) Present photographs of the project site. While project site photos exist in multiple reports submitted, additional photos will be provided upon request. 18.22.950 Habitat Management Reports (a) Detailed description of all proposed project components relative to on -site FWHCAs, other on -site development, and limits of clearing; The project is fully described above pertaining to JCC 18.22.905. Per JCC 18.22.610(1), the following are designated as fish and wildlife habitat conservation areas (FWHCA) within the work area of the proposed work at Point Whitney: • Areas where federally listed species and state listed species have a primary association • Recreational shellfish areas • Kelp and eelgrass beds • Forage fish spawning areas Each of these areas will be potentially affected by project work. (b) State whether or not in -water work is proposed, and if so, describe timing and methods of construction; The approved work window for the marine areas of Puget Sound is July 16 to October 14. This project is contained within Tidal Reference Area 12 (South Puget Sound) with considerations for salmon, bull trout, surf smelt and sand lance. For this proposed project, WDFW would complete all work subject to tidal influence within the specified work windows. However, work could be conducted from July 16 to February 15 with a negative forage fish survey conducted by an approved biologist through WDFW. Negative survey results are valid for 14 days from the date of the survey, or if forage fish spawning is observed. Work is anticipated to be conducted in the dry during low tides as much as possible. As the tide is going out, grading will occur, and as the tide comes in, the planks will be placed, starting at the bottom of the ramp and working landward. Equipment will remain in the footprint of the existing ramp and not onto the beach. Articulated concrete mats will be installed in a similar manner, then secured to the planks and into the substrate. (c) Date site visits were made and date report was completed; Site visits have been conducted on 3/20/19, 4/23/19, 5/17/19, 6/5/19, 6/21/19, 7/219-30/19, 8/7/19, 8/13/19, 3/12/20, 1/15/21, and 07/23/21. This report was completed on July 26, 2021. (d) Detailed description of the field investigation results, including habitat types present on the property, habitat conditions with FWHCAs, location of native vegetation on the property, and location of nonnative or invasive vegetation on the property. The habitat management report should indicate if the critical areas extend off site; A Biological Assessment has been prepared for this project and it details the habitat types on the project site and beyond for listed species. Usage by listed species extends off site. Recreational shellfish beds exist on the site and seasons are set by the WDFW. The site photos show the extent of the shellfish usage. Oysters and clams can be found on the site and beyond. In addition, an eelgrass delineation letter has been provided to provide technical expertise on the eelgrass beds in the area. Forage fish and habitat assessments have been identified in the Biological Assessment for this site as well. Native vegetation is present on the site in low-lying clumps on the shoreline. None of the vegetation is expected to be removed for project work. Non-native vegetation is unknown on the site. (e) If the project area is identified as potential habitat for threatened or endangered species, methods used to determine presence or absence of listed species, methods used to determine if appropriate habitat occurs on site or in the vicinity of the site, and results of the field investigation; All listed species have been reviewed for site use, per the BA. Please see Section 10 of the report for details on the presence or absence of the species and the effects determinations made for species and their designated critical habitats. (f) In addition to complying with the clearing, grading, excavation, and stormwater requirements in JCC 18.30.060 and 18.30.070, and the current Stormwater Management Manual for Western Washington, describe any potential effects of the proposed activity on stormwater quantity, quality, and runoff patterns post - construction. The report must clearly indicate if the proposal will affect or alter water movement to the FWHCA and buffer if the proposal is implemented and identify measures to avoid or minimize alteration of stormwater runoff patterns post - construction; There will be no alterations to stormwater conveyance once the project is complete. The ramp is in the same location and the parking area is not being graded. Seasonal restrictions applied to work conducted within or below the CHWM or MHHW, will follow requirements within the HPA issued by the Washington Department of Fish and Wildlife, and Water Quality Standards for Surface Waters of the State of Washington (Chapter 173-201A WAC). Construction work will be completed in the approved work window for the project area. This will help minimize disturbance to species because the work windows reference when fish presence will be reduced- particularly juveniles. Construction impacts will be confined to the minimum area necessary to complete the project. The contractor will use BMPs, as stated in their Spill Prevention Control and Countermeasures Plan, to ensure that no foreign material such as oil or fuel from construction equipment will enter any wetlands, flowing or standing water. The spill prevention BMPs and water quality BMPs will minimize/prevent pollutants from entering the waterbody during construction. All heavy equipment used for boat ramp improvements will be situated on the existing boat ramp. This minimizes disturbance, compaction and degradation of beach habitat and minimizes risk of oil leaks on beach. Upland coir logs, or other sediment control devices that trap and/or filter overland runoff placed for stormwater overland flow diversion and management during construction period. This will eliminate the potential for overland runoff of sediment or contaminant -laden waters into the beach area during construction period. (g) Identify all potential impacts of the proposed activity on FWHCAs. The habitat management report shall include: (i) Mitigation Sequencing. Describe measures to avoid and minimize impacts to FWHCAs. For any unavoidable impacts, describe and justify all project components that cannot avoid impacting the FWHCA. For unavoidable impacts, mitigation plans must be prepared in accordance with subsection (3)(h) of this section. Mitigation sequencing per JCC 18.22.660(2) is designed to ensure no net loss of functions on a site. While impacts on FWHCAs are minimal for this project due to scope and extent of project work, the following sequencing has been conducted: a. Avoidance —The project has been designed to construct anew boat ramp in the same footprint, avoiding additional siting. This allows for a lower impact since the impact already exists. Other avoidances have been a limit of footprint extension and that no other work will be conducted on the site. b. Minimization — The impacts have been limited to the smallest impacts necessary to provide safe access to shorelines and marine waters for users. In addition, the proposed ramp will be placed on the existing instead of removing the ramp to reduce the impacts of removing the concrete below grade. The placement below grade allows for sediment transport over the ramp and will not impede the transport of material as needed for beach processes. Minimizing effects to listed species and habitats will be accomplished through project timing, including maximizing low tides and adhering to a fish window for in -water work. c. Rectifying adverse impacts — Repair, rehabilitation, or restoration is not possible when installing a boat ramp in order for the recreational uses to continue. This piece of sequencing was not used. d. Reducing impact overtime —The access site is intended to be maintained and used for at least 20 years without replacement. Maintaining the site will allow for this to be a recreational opportunity for years to come for the public. e. Compensating by replacing, enhancing, or providing substitute resources or environments — Some area was restored (roughly 900 square feet) to a lower grade where vegetation is now able to grow. This restored area is being proposed as mitigation for some impacts due to project activity. In addition, utilizing in -lieu fee mitigation credits in coordination with HCCC will offset impacts deemed necessary by regulating agencies including Jefferson County. (ii) Types of Impacts. All potential impacts to FWHCAs and their functions and values shall be identified and described in the habitat management report. Habitat management reports shall consider direct impacts, indirect impacts, permanent impacts, temporary (long-term and short- term) impacts, and cumulative impacts. Listed species: Direct and indirect impacts to listed species and their associated critical habitats can be found in the BA supplied. Recreational shellfish: Impacts may include increased traffic to the site due to a safer and more user- friendly boat ramp and increased harvest during allowable harvest times. Additional impacts could include additional foot traffic to the site, increased boat traffic leading to eelgrass and shellfish damage from boats and vehicles, and potential of increased toxins related to site traffic increases. With WDFW testing the site for toxins and harvest, cumulative impacts on the site if management remains diligent, should show no changes to the site impacts due to the project. Kelp and eelgrass beds: An eelgrass memo has been supplied for this project. Impacts from the proposed project have been minimized by maintaining and reducing the length of the boat ramp. Eelgrass beds are anticipated to continue to thrive in this area. Potential impacts from power loading of boats could be a reduction in eelgrass beds, but an impact like that would assume a change in the boating community at the site. Forage fish spawning areas: Impacts to forage fish are anticipated to remain similar to impacts now. While increased vehicle traffic may impact the availability of forage fish spawning area within the ramp footprint, the increase in the ramps size may be the biggest impact. The increase from 10 feet to 12 feet wide has the potential to remove viable spawning areas at some times of the year. The articulated concrete mats provide 20% open space to allow sediment to fill in gaps, so these areas may still be a potential spawning area. Additional impacts have been reviewed and can be found in the BA for this project. (iii) Impact Area. The area (square footage) of potential impact shall be quantified for each FWHCA. At a minimum, impact area shall include FWHCA that occurs within the limits of clearing, as shown on the site plan, The area of potential impact includes the area of the proposed ramp, totaling 2,016 SF. The Action Area calculated by the consultant for the ramp work (included in the BA) includes area that will not be impacted, as the piles are no longer being removed. Therefor, using the same sound attenuation assessment for work done on the ramp, the impact area may encompass up to a 281 foot buffer from the work, as shown below. Given that the surrounding surface is comprised of water and flat surface, a hard surface coefficient is used. Sound attenuation for hard site conditions is 6 dB per doubling of distance for point source. Background levels (including anthropogenic sources such as pumps and traffic) are assumed to be around 73 dBA including wave action. Heavy equipment consisting of an excavator (87 dB at 50 feet) and a front end loader (81 dB at 50 feet) will generate up to 88 dBA of noise on the site. Using the first equation from section 7.1.4.2 of the Construction Noise Impact Assessment (WSDOT Biological Assessment Preparation Manual August 2020), we find that: D = Do * 1OKonstruction Noise —Ambient Sound Level in dBA)/a) Where D = the distance from the noise source Do = the reference measurement distance (50 feet in this case) a = 25 for soft ground and 20 for hard ground. For point source noise, a spherical spreading loss model is used. These alpha (a) values assume a 7.5 dBA reduction per doubling distance over soft ground and a 6.0 dBA reduction per doubling distance over hard ground. D = 50 * 1088-73 = 281 feet (h) Provide a detailed mitigation plan for any unavoidable impacts. A mitigation plan will be developed by the HCCC once in -lieu fee has been approved. The mitigation work also includes the previously completed restoration of the western edge of the "point" at the west side of the project. Parking area and fill was removed to match the existing grade of vegetation on the site (See Plan Set Sheet 9). The area is expected to revegetate naturally with grasses and low vegetation. This accounts for roughly 900 square feet of mitigation above OHW. Sorl DEPARTMENT OF COMMUNITY DEVELOPMENT W621 Sheridan Street, Port Townsend, WA 98368 Tel: 360.379.4450 1 Fax: 360.379.4451 Web: w,, w. o.' Offervnn.wq. ,% enm itnitvdcvfJonmc•nr PARCEL# SOIGT1.0Q1 E-mail: 1 o. •f srso ,w,.us T ' Scan the QR code to access p _ the digital form STORMWATER CALCULATION WORKSHEET PROJECT/APPLICANT NAME: DETERMINING STORMWATER MANAGEMENT REQUIREMENTS: This stormwater calculation worksheet should be completed first to classify the proposal as "small," "medium," or "large." The size determines whether a Stormwater Site Plan is required in conjunction with a stand-alone stormwater management permit application, building permit application, or other land use approval application that involves stormwater review. The basic information will also be helpful for completing a Stormwater Site Plan, if required. PARCEL SIZE I.E. SITE Size of parcel 10.94 acres An acre contains 43,560 square feet. Multiply the acreage by this figure Size of parcel in square feet 476546.4 sq/ft Land -disturbing activity is any activity that results in movement of earth, or a change in the existing soil cover (both vegetative and non -vegetative) and/or the existing soil topography. Land disturbing activities include, but are not limited to clearing, grading, filling, excavation, and compaction associated with stabilization of structures and road construction. Native vegetation is vegetation comprised of plant species, other than noxious weeds, which reasonably could have been expected to naturally occur on the site. Examples include species such as Douglas fir, western hemlock, western red cedar, alder, big -leaf maple, and vine maple; shrubs such as willow, elderberry, salmonberry, and salal; herbaceous plants such as sword fern, foam flower, and fireweed. LAND DISTURBING ACTIVITY CONVERSION OF NATIVE VEGETATION AND VOLUME OF CUT/FILL Calculate the total area to be cleared, graded, filled, excavated, and/or compacted for proposed development project. Include in this calculation the area to be cleared for: Construction site for structures NIA sq/ft Drainfield, septic tank, etc. _ NIA sq/ft Well, utilities, etc. N/A sq/ft Driveway, parking, roads, etc. N/A sq/ft Lawn, landscaping, etc. NJA� sq/ft Other compacted surface, etc. _ 564 _ sq/ft Temporary construction area N/A sq/ft Total Land Disturbance sq/ft Answer the following two questions related to conversion of native vegetation: Does the project convert % acres or more of native vegetation to lawn or landscaped areas? Circle: Yes No Does the project convert 2 % acres or more of native vegetation to pasture? Circle: Yes No Indicate Total Volumes of Proposed: (Includes BMP T5.13 Fill Vofume) Cut Fill (cu/yd) stormwater talc worksheet OR code— REV 5/31/2019 Pagel 02 STORMWATER CALCULATIONS — IMPERVIOUS SURFACE Impervious surface is a hard surface that either prevents or slows the entry of water into the soil as under natural conditions prior to development. A hard surface area which causes water to run off the surface in greater quantities or at an increased rate of flow from the flow present under natural conditions prior to development. Common impervious surfaces include, but are not limited to roof tops, walkways, patios, driveways, parking lots or storage areas, concrete or asphalt paving, gravel roads, packed earthen materials, and oiled, macadam or other surfaces which similarly impede the natural infiltration of stormwater. NEW Structures (all roof area) 0 sq/ft Sidewalks Patios Solid Decks (without infiltration below) ENOMW 0 sq/ft sq/ft Driveway, parking, roads, etc 0 sq/ft Other 336 sq/ft Total New 336 sgtft EXISTING Structures (all roof area) 21,900 sq/ft Sidewalks sq/ft Patios Q sqM Solid Decks sq/ft (without infiltration below) Driveway, parking, roads, etc 59,771 sq/ft Other 1,100 sq/ft Total Existing 82,771 sq/ft TOTAL NEW + TOTAL EXISTING* 83,107 sq/ft `This amount will be used to check total lot coverage. DEVELOPMENT v. REDEVELOPMENT Divide the total existin Does the site have > 35% or more ,♦ no impervious surface above by the existing impervious surface? size of the parcel and convert to a percentage. 17.37 % The proposal is considered new development. Answer r yes questions in Figure 2.4.1 Flow Chart for New Development to determine project size (next page). The proposal is considered redevelopment Answer questions in Figure 2.4.2. Flow Chart for Redevelopment to determine project size (next page). Applicants for "small' projects must comply only with Minimum Requirement #2—Construction Stormwater Pollution Prevention. Please submit the Small Project Certification (Worksheet "s). The proponent is responsible for employing the 12 Elements to control erosion and prevent sediment and other pollutants from leaving the site during the construction phase of the project. Pick up the Construction Stormwater Pollution Prevention (SWPPP) Best Management Practices (BMPs) Fact Sheet. Applicants for "medium" projects —those that must meet only Minimum Requirements #1 through #5 must submit Worksheet Al and 131, a stormwater site plan and a construction stormwater pollution prevention site plan (See Reference A1A and 131A for guidance).). "Large" projects —those that must meet all 9 Minimum Requirements— must submit Worksheet Al and B1, a stormwater site plan and a construction stormwater pollution prevention site plan (See Reference A1A and 131A for guidance). Large projects also may require engineering. See Worksheet Lto determine additional large project requirements. APPLICANT SIGNATURE By signing the Stormwater Calculation Worksheet, I as the applicant/owner attest that the information provided herein is true and correct to the best of my knowledge. I also certify that this application is being made with the full knowledge and consent of all owners of the affected property. (LANDOWNER OR AUTHORIZED REPRESENTATIVE SIGNATURE) (DATE) stormwater calc worksheet QR code — REV. 5/31/2019 page 2 of 2