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Home My WebLink AboutPier Dock over lake - HMP Habitat Managment Plan - 8/3/2023 Ca 3 RECEIVED Habitat Corp. AUG - 3 2023 Habitat Management Plan 5 W. Alder street l' R orb-t P �� :y ?� ..''� w is I_�'' { .. _ ,'•�' •. .A_ •� _ a� .• l v � P.0 ...f• N PREPARED FOR: Abel and Jamie Deffinbaugh 1602 E Spencer Lake Road Shelton, WA 98584 PREPARED BY: Christy Christensen C3 Habitat 4806 130T" ST CT NW Gig Harbor, WA 98332 C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 3 Habitat Corp. TABLE OF CONTENTS 1.0 INTRODUCTION.................................................................................................................................2 2.0 PROJECT DESCRIPTION......................................................................................................................2 SITEVICINITY MAP....................................................................................................................................2 3.0 CRITICAL AREA REVIEW.....................................................................................................................3 3.1 National Wetlands Inventory........................................................................................................3 3.2 Priority Habitat and Species..........................................................................................................3 4.0 FIELD REVIEW....................................................................................................................................3 MasonLake...............................................................................................................................................3 5.0 POTENTIAL ECOLOGICAL IMPACTS FROM PROPOSED SITE ACTIVITY...............................................5 5.1 Baseline Environmental Conditions....................................................................................................5 6.0 IMPACT AVOIDANCE AND MITIGATION MEASURES.........................................................................6 7.0 IMPACTS OF SITE DEVELOPMENT...........................................................................................................7 Conditions.....................................................................................................................................................7 8.0 MITIGATION PLAN...................................................................................................................................8 9.0 PLANTING PLAN..................................................................................................................................8 PLANTMATERIALS LIST.........................................................................................................................9 10.0 MONITORING PLAN ..............................................................................................................................9 11.0 MAINTENANCE PLAN ..........................................................................................................................10 12.0 SUMMARY...........................................................................................................................................10 C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 3 Habitat Corp. HABITAT MANAGEMNT PLAN Parcel number Acreage Owner S/T/R Proposed Use 22132-33-90080 5.25 DEFFINBAUGH 32/21N/2W NEW DOCK 1.0 INTRODUCTION C3 Habitat (0) has completed a Habitat Management Plan to address function and ecological impacts to shoreline habitat for the Deffinbaugh proposed dock project. The project is located on Spencer Lake in Section 32 of Township 21N in Range 02W of the Willamette Meridian. The project includes construction of a new overwater pier and "ell" shape ending dock along the western shore of Spencer Lake. There will also be a 20 by 20 pea gravel area at the dock approach. Because the project is located within a regulated residential shoreline, it requires regulation under the Shoreline Master Program Title 17.50.320. Mitigation is required for any new impervious area that is created and/or vegetation clearing. The goal of this Mitigation Plan is to achieve a no-net loss to the ecological function of the shoreline habitat and resultant landward buffer. 2.0 PROJECT DESCRIPTION The project consists of a new overwater pier with "ell" shape ending extending from a somewhat existing cleared area on the western shore of Spencer Lake. Existing structures on the parcel include a single-family residence and gravel driveway. Much of the parcel is naturally vegetated except around the residence and near the shoreline buffer where the dock is proposed. There are no landward wetlands or streams on the property. The project includes a partially grated pier with composite decking which includes sixteen 10-inch pilings. Specifically, a 60-foot overwater pier with a 12X20-foot"ell" shape ending. The pier is 6-feet wide for 48-feet where it then extends southward (L-shape) 12-feet by 20-feet. There is 50% functional ThruFlow grating with composite decking. Grating has 61percent open area. C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 Diffenbaugh HMP SITE VICINITY MAP Spencer Lake Baf f IL � x _ft w, f Q. i ➢ � m C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 Diffenbaugh HMP 3.0 CRITICAL AREA REVIEW 3.1 National Wetlands Inventory The U.S. Fish and Wildlife Service, National Wetlands Inventory (NWI) identifies no landward wetlands on the subject property. The NWI map lists Spencer Lake as L1UBH - (L) - Lacustrine, (1) - Limnetic, (UB)- Unconsolidated bottom, (H) - permanently flooded. The nearest landward wetland is approximately 150-feet to the southwest from the proposed dock location. See NWI Map - Figure 1. 3.2 Priority Habitat and Species The U.S. Fish and Wildlife Service, Priority Species and Habitat Maps (PHS) identify the following features below the OHWM and in proximity of the project: Rainbow Trout-Malaney Creek and Resident Coastal Cutthroat-Malaney Creek. Landward of the OHWM the PHS lists several freshwater forested/shrub and freshwater emergent wetlands within a 1,800-foot radius of the subject property. See PHS Map- Figure 2. 4.0 FIELD REVIEW Field and aerial photograph review was performed on the subject parcel as well as adjacent parcels. There are no restrictions to the property other than the designated shoreline of Residential Shoreline zoning. The Spencer Lake shoreline setback buffer is 100-feet plus a 15-foot building setback. The western property line is defined by Spencer Lake Road and slopes gently downward to the lake which defines the eastern property line. There is a large emergent/shrub freshwater wetland just off the southern property line and approximately 150-feet SW from the proposed project. The nearest regulated stream is Malaney Creek approximately 445-feet to the southwest. Spencer Lake has several narrow strips of lake fringe wetlands along its shoreline. Field review revealed no special habitat or species utilizing the landward or waterward portion of the property that would impose any additional regulation to the property that isn't included in the residential shoreline buffer. Mason Lake Spencer Lake is the most popular trout water in Mason County. The lake is stocked multiple times a year with rainbow and cutthroat trout.The lake also hosts large and smallmouth bass and yellow perch. Spencer Lake is 212-acres in size and sits at an elevation of 175-feet above sea-level. C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 Diffenbaugh HMP FIGURE 1. NWI MAP 1 r , le f. 4 ? 1 Y' � a too t C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 Diffenbaugh HMP - ' ` t �. 1+M�rr fir. ,a► t r. 3�7 ,3, - 1 1 radius At Study Area . OL '-eel 711 5.0 POTENTIAL ECOLOGICAL IMPACTS FROM PROPOSED SITE ACTIVITY 5.1 Baseline Environmental Conditions Currently, the shoreline buffer in the immediate vicinity of the proposed dock is devoid of vegetation above the OHWM. Lake fringe vegetation is dominated by reed canary grass and sedge at the shoreline. The remainder of the upland area consisted of dense scrub/shrub habitat with a healthy tree canopy. The dominant upland vegetation is evergreen huckleberry, salal, and fir trees.See site specific photo below. C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 Diffenbaugh HMP Site Photo landward of proposed dock. ,i r a rJ ti 6.0 IMPACT AVOIDANCE AND MITIGATION MEASURES According to the Mason County's Shoreline Master Program, the use of mitigation sequencing is required and essential to determining how the proposed project contributes to the no net loss standard. Avoiding the impact. At least 75 percent of the shoreline lots around Spencer Lake have docks but there are no year-round docks near the subject parcel.As docks are allowed under the Shoreline Master Program for each tax lot,the property owner has the right to their own dock. 1. Avoid- Docks are allowed, so avoidance is not practical and there are no year-round docks near the property for potential dock sharing. 2. Minimize - The proposed dock is the shortest length possible to achieve the desired purpose. Additionally, the dock is 61% grated to allow for light penetration to not disturb the lake habitat to the greatest extent possible. 3. Rectify - To achieve a no net loss of environmental functions, the applicant proposes to plant the bare dirt areas immediately upland of the OHWM with approximately 48 plants (trees, shrubs, and groundcover) with 7 varieties of species. C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 Diffenbaugh HMP 4. Reduce - Shading will be reduced by providing 61% grating to allow for maximum light penetration. The structure will be supported with galvanized steel pilings instead of treated wood, and the un-grated portions of the pier will be covered with composite decking instead of treated wood. 5. Compensate - To achieve a no net loss of environmental functions, the applicant will enhance the shoreline buffer with native plants.Currently the shoreline buffer is bare earth. 6. Monitor - Maintain the newly planted material. If any die, replace them with native vegetation. 7.0 IMPACTS OF SITE DEVELOPMENT The impacts to the existing habitat and ecological function of the property from the proposed site activities are negligible. However, allowing for the construction of the proposed dock and pea gravel area will have minor impacts to the lake environment. The two main typical ecological impacts from dock development are: 1. Human activity- There will be an increase in overwater human activity. Residential development along shorelines can have several impacts to the shoreline environment such as recreational fishing, water quality and wildlife effects. Additionally, waves created from boats can alter the stability of lake banks and bulkheads. 2. Water Quality - Keeping any boat well maintained and free of oil and gas leakage is recommended. When boat washing, clean water without soap or chemicals is recommended. Conditions To minimize adverse effects on habitats and species caused by overwater structures that reduce ambient light levels, overwater structures shall incorporate functional grating. Treated wood or toxic materials used for components that may come in contact with water shall be made of non-toxic materials where feasible. The overwater structure should be located and designed to not significantly impact or unnecessarily interfere with the rights of adjacent property owners, or adjacent water uses including navigation and boat operation. Artificial lighting on overwater structures shall be the minimum necessary and lighting should be designed to minimize glare. The overwater structure shall be constructed and maintained in a safe and sound condition. Abandoned or unsafe structures shall be removed or repaired promptly by the owner. For freshwater docks,the measured overall length cannot exceed sixty feet from the 0HWM. C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 Diffenbaugh HMP 8.0 MITIGATION PLAN There are 2 main components proposed for site development,the dock and a small 20 by 20 pea gravel area at the dock approach. The pea gravel area is in the area already devoid of vegetation. Total combined area of impact equals 928- square feet. The applicant proposes to plant approximately 48-plant units using 7 varieties of native species.About 1,400 square- feet of area landward of the OHWM will be planted and exceeds the amount of area impacted. A detailed planting schematic is attached. Introduce habitat features such as bat boxes and bird baths. Bat boxes should be installed on the home structure or on individual poles that have a good source of sunlight. Do not install bat boxes on trees as they are often too shaded for proper habitat. Avoid any dredging for pile installation during salmon spawning - August through November, if possible. 9.0 PLANTING PLAN Approximately 1,400-square feet of buffer will be planted with 48 native plant units to meet an average density planting plan. The following is a list of suggested species to be used for planting. The species chosen will depend on availability and through input by the biologist (0) and/or landscape architect. Additional or different native plant species may be substituted at the discretion of the landscape professional or project biologist.Plant quantity is based on 4-6' spacing on center for shrubs, 10-foot on center for trees and filler spacing for groundcover species.Based on the above spacing for planting 1,400 square feet of mainly bare earth, 48 native plants are recommended and should use a minimum of 5 varieties of species. Plants will be installed on the landward side of the proposed dock. Focus on planting areas currently devoid of vegetation (disturbed). Using container plants (as opposed to bare root) and planting between October 15th and March 15th will increase success rates. Periodic irrigation during extended dry periods may be necessary during the first couple years.Bark chip mulch or planting mats should be placed around the base of each plant to improve moisture retention and to reduce competition from invasive or weedy species. The following list of recommended species has been chosen because they perform well across a wide variety of site conditions. They tolerate water fluctuations like onsite conditions. The recommended list of species also creates valuable wildlife habitat value and aesthetic qualities. These plants typically have high success rates for a wide spectrum of mitigation and enhancement projects. C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 Diffenbaugh HMP PLANT MATERIALS LIST QuantityPlanting Location per unit Shoreline Buffer Vine maple 2 8-10' o.c 1-5 gallon 9.75 19.50 Evergreen 10 2-4' o.c. 1 gallon 8.75 87.50 Huckleberry Indian plum 6 6-8' o.c. 1 gallon 10.75 64.50 or red current Salal or Mock 10 2' o.c 4" pot 8.25 82.50 orange Snowberry or 10 2-4' o.c. 1 gallon 8.90 49.00 coneflower Sword Fern 10 4' o.c. 1 gallon 5.65 56.50 or High Bush Cranberry Kinnikinnik As needed Fill voids Plugs Plant $359.50 Material 10.0 MONITORING PLAN Mason County Department of Community Development may request a monitoring report to be submitted during installation and over a period of time. We recommend at a minimum that photo points be established so that you can provide County officials photographic evidence of successful survival standards. A project biologist or landscape professional should be on-site during installation to ensure proper methods are being used. The project biologist can periodically check on the status of planted vegetation over a duration of five years and provide letters to the County addressing project status. Vegetation monitoring consists of two (2) tasks.The first is an inspection of planted material to determine overall health and vigor. Survival of all planted material will be quantified during each monitoring event. The second task will be the sampling of the plant community to determine that adequate vegetative coverage is developing. C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 Diffenbaugh HMP Photo stations should be set up along different portions of the buffer to visually document the overall appearance of the mitigated area. Visual observation of all wildlife species observed during the monitoring should be recorded. 11.0 MAINTENANCE PLAN The primary goals of mitigation are to enhance existing conditions by increasing plant community diversity and habitat complexity while preserving water quality and habitat value. The Maintenance Plan will ensure that the installed plants survive and meet the performance standards within the monitoring period. Maintenance includes watering as needed during the dry season. If the plants are installed during the dry season of the installation year, a temporary or permanent irrigation system may be necessary. 12.0 SUMMARY This mitigation plan exceeds the requirements outlined in Mason County Shoreline Master Program. The project will result in 528-square feet of overwater structure with 61-percent functional grading for a total of 322.08-square feet of new structure shading 400-square feet of pea gravel at the dock approach. To compensate for the impact, approximately 1,400- square feet of area will be enhanced with new plantings achieving a no net loss to habitat value. The result is a net gain to the ecological functions and habitat of the shoreline environment. Best management practices shall be used for all site work. This Habitat Management Plan is being provided as a conceptual plan to be used by Mason County Department of Community Development and the client. The client will ultimately be responsible for the implementation and the overall success of this plan in conjunction with any additional comments or suggestions received from Mason County staff. Respe fully submitted by: Christoy Christensen Senior Biologist C3 Habitat C3 Habitat-Gig Harbor WA 98332 Phone 360.471.5416 Fax 800.756.0996 DEFFINBAUPH \$11TE PLAN �N //Proposed Condkions SCALE: �V //213' A'operly \\ \ / e \ 1"=100' // \V 4V \ \\ Proposed planting area \ \ 1,400 ft2{see magnified \ ` \ planting schematic for \ E SPENCER 115 foot residentUshorefinebulfm �� plant detail \\ — LAKE RD _ �mcludes 15'buildingsetbQKIO 385' Subject Property. Add 2o' ✓ j—��/ Abel & Jamie Deffinbaugh SFR pea 9ra 1602 E Spencer Lake Rd / Shelton ,WA 98584 22132-33-90080 61 V �/ \ New do& I �- O.H.W.M. t SPe4m LAM I \ I J ` REFERENCE: APPLICANT: Abel & Jamie Dbaugh ^ PROPOSED: Constnut new 60-bot overwater pier with 12-bot by 20-foot "ell" at the end. / AT: Spencer LaW COUNTY: Mason STATE: WA SHEET 2 of 3 DATE: May 2, 2023 I I �3- DEFFINBAUGH CRITICAL AREA SCHEMATIC I Parcel:22132-33-90080 Wedand I 1602 E Spencer Lake Road Shelton,WA 98584 Malaney-treek 06/20/2023 I \vine maple 2 units 8-10'o.c. PLANTING SCHEMATIC \ sword fern or high bush \ cranberry 10 units 2-4'o.c / Indian plum or red current / 6 units 6-8'o.c. salal 10 units 2-4'o..c. e.huckleberry 10 units 2-4'o.c. / snowberry or coneflower 10 units 2-1'o.c. / 40 kinnikinnik patches-fill in voids 20X20 Pea Gravel Area \ Add large rocks A available(not required) \ i Planting Area-1,400 ft2 * \ Total Units-48 eidsting trail 1.400ft2 planting area \ / New ptaposed Dock O 69 �..�.. DEFFINBAUGH PLANTING SCHEMATIC graphical sole=25 feet Parcel;22132-33-90080 1602 E Spencer Lake Road Shehon,WA 98S84 06M2023 SPENCER LAKE PHS Report ui rt.trt: Priority Habitats and Species on the Web yr � r ♦ � ivy_ Y _ r r f.`r •;�� • � - rah' �-r, �-t ,r��. _ w f - .a.^t`•�x_. ,.- �� "A III. a . � V a qf: �:. F�,► �//' "! *` _ -y!\ fir`, r.�,L�A.M ,. • � ,� t tit �tt.<� 7 ar k iV P� F a'`�.✓ .. r Buffer radius: 1800 Feet Report Date: 06/21/2023 User Comments/Notes: Deffinbaugh Dock abouttlank 1/8 PHS Report PHS Species/Habitats Overview: 11 Occurence Name Federal Status State Status Sensitive Location Rainbow Trout N/A N/A No Resident Coastal Cutthroat N/A N/A No Freshwater Emergent Wetland N/A N/A No Freshwater Forested/Shrub N/A N/A No Wetland PHS Species/Habitats Details: Rainbow Scientific Name Oncorhynchus mykiss Priority Area Occurrence/Migration Site Name Malaney Creek Accuracy NA Notes LLID: 1230000472502, Fish Name: Rainbow Trout, Run Time: Unknown or not Applicable, Life History: Unknown Source Record 55952 Source Dataset SWIFD Federal Status N/A State Status N/A PHS Listing Status PHS Listed Occurrence Sensitive N SGCN N Display Resolution AS MAPPED More Info http://wdfw.wa.gov/wlm/diversty/soc/soc.htm Geometry Type Lines about:blank 2/8 PHS Report Resident .. Cutthroat Scientific Name . Oncorhynchus clarki Priority Area Occurrence/Migration Site Name Malaney Creek Accuracy NA Notes LLID: 1230000472502, Fish Name:Cutthroat Trout, Run Time: Unknown or not Applicable, Life History:Unknown Source Record 55947 Source Dataset SWIFD Federal Status N/A State Status N/A PHS Listing Status PHS Listed Occurrence Sensitive N SGCN N Display Resolution AS MAPPED More Info http://wdfw.wa.gov/wim/diversty/soc/soc.htm Geometry Type Lines CutthroatResident Coastal Scientific Name Oncorhynchus clarki Priority Area Occurrence/Migration Accuracy NA Notes LLID: 1229664472597, Fish Name:Cutthroat Trout, Run Time: Unknown or not Applicable, Life History: Unknown Source Record 55550 Source Dataset SWIFD Federal Status N/A State Status N/A PHS Listing Status PHS Listed Occurrence Sensitive N SGCN N Display Resolution AS MAPPED More Info http://wdfw.wa.gov/wlm/diversty/soc/soc.htm Geometry Type Lines about:blank 3/8 PHS Report Freshwater Emergent Wetland Priority Area Aquatic Habitat Site Name N/A Accuracy NA Notes Wetland System: Freshwater Emergent Wetland-NWI Code: PEM1 F Source Dataset NWIWetlands Source Name Not Given Source Entity US Fish and Wildlife Service about:blank 4/8 PHS Report Federal Status N/A State Status N/A PHS Listing Status PHS Listed Occurrence Sensitive N SGCN N Display Resolution AS MAPPED ManagementRecommendations http://www.ecy.wa.gov/programs/sea/wetlands/bas/index.html Geometry Type Polygons Freshwater Emergent Wetland Priority Area Aquatic Habitat Site Name N/A Accuracy NA Notes Wetland System: Freshwater Emergent Wetland-NWI Code: PEM1F Source Dataset NWIWetlands Source Name Not Given Source Entity US Fish and Wildlife Service Federal Status N/A State Status N/A PHS Listing Status PHS Listed Occurrence Sensitive N SGCN N Display Resolution AS MAPPED ManagementRecommendations http://www.ecy.wa.ggv/programs/sea/wetlands/bas/index.html Geometry Type Polygons Freshwater Emergent Wetland Priority Area Aquatic Habitat Site Name N/A Accuracy NA Notes Wetland System: Freshwater Emergent Wetland-NWI Code: PEM1F Source Dataset NWIWetlands Source Name Not Given Source Entity US Fish and Wildlife Service Federal Status N/A State Status N/A PHS Listing Status PHS Listed Occurrence Sensitive N SGCN N Display Resolution AS MAPPED ManagementRecommendations hftp.L/www.ecy.wa.ggv/pfograms/sea/wetiands/bas/index.html Geometry Type Polygons about:blank 5/8 PHS Report Freshwater Emergent Wetland Priority Area Aquatic Habitat Site Name N/A Accuracy NA Notes Wetland System: Freshwater Emergent Wetland-NWI Code: PEM1F Source Dataset NWIWetlands Source Name Not Given Source Entity US Fish and Wildlife Service Federal Status N/A State Status N/A PHS Listing Status PHS Listed Occurrence Sensitive N SGCN N Display Resolution AS MAPPED ManagementRecommendations http://www.ecy.wa.gov/programs/sea/wetlands/bas/index.html Geometry Type Polygons Freshwater Forested/Shrub Wetland Priority Area Aquatic Habitat Site Name N/A Accuracy NA Notes Wetland System: Freshwater Forested/Shrub Wetland-NWI Code: PSS/EM1 C Source Dataset NWIWetlands Source Name Not Given Source Entity US Fish and Wildlife Service Federal Status N/A State Status N/A PHS Listing Status PHS Listed Occurrence Sensitive N SGCN N Display Resolution AS MAPPED ManagementRecommendations http://www.ecy.wa.gov/programs/sea/wetlands/bas/index.html Geometry Type Polygons about:blank 6/8 PHS Report Freshwater Forested/Shrub Wetland Priority Area Aquatic Habitat Site Name N/A Accuracy NA Notes Wetland System: Freshwater Forested/Shrub Wetland-NWI Code: PSSC Source Dataset NWIWetlands about:blank 7/8 PHS Report Source Name Not Given Source Entity US Fish and Wildlife Service Federal Status N/A State Status N/A PHS Listing Status PHS Listed Occurrence Sensitive N SGCN N Display Resolution AS MAPPED ManagementRecommendations http://www.ecy.wa.ggv/programs/sea/wetlands/bas/index.html Geometry Type Polygons DISCLAIMER.This report includes information that the Washington Department of Fish and Wildlife(WDFW)maintains in a central computer database.It is not an attempt to provide you with an official agency response as to the impacts of your project on fish and wildlife.This information only documents the location of fish and wildlife resources to the best of our knowledge. It is not a complete inventory and it is important to note that fish and wildlife resources may occur in areas not currently known to WDFW biologists,or in areas for which comprehensive surveys have not been conducted.Site specific surveys are frequently necesssary to rule out the presence of priority resources.Locations of fish and wildlife resources are subject to variation caused by disturbance,changes in season and weather,and other factors.WDFW does not recommend using reports more than six months old. about:blank 8/8