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HomeMy WebLinkAboutBLD2024-00490 - HMP Habitat Managment Plan - 2/28/2024 toNL 09c)ail - (Do Y v C) PLANNING RECEIVED Habitat Management Plan MAR 122024 615 W. Alder Street Parcel: 22005-52-00061 2860-2880 E Phillips Lake Loop Rd Shelton, WA 99,584 Mason County, WA Report prepared for: Michael & Karrie Parker 905 Maplewood Ln NE Bainbridge Island, WA 98110 Prepared by: Rob Nagel PO Box 2466 Shelton, WA 98584 rob@arctos-environmental.com (360) 229-3118 Ar(�+os Environmental LLG Project: 2024-H M P-002 February 2024 Project: 2024-HMP-002 February 2024 Arctos Environmental LLG Table of Contents Overview ............................................................................................................1 PropertyDescription...........................................................................................2 Analysis of Potential Impacts..............................................................................3 MitigationMeasures...........................................................................................4 Monitoring..........................................................................................................7 Summary ............................................................................................................7 References..........................................................................................................8 Appendix: Site Photos.........................................................................................9 List of Figures Figure1: Vicinity Map .........................................................................................2 i Project: 2024-HMP-002 February 2024 Arctos Environmental LLG Habitat Management Plan 22005-52-00061 2860-2880 E Phillips Lake Loop Rd Shelton, WA 98584 Overview This report details a Habitat Management Plan (HMP) for the above referenced property in Mason County, Washington. The purpose of this report is to address potential adverse impacts from the construction of several proposed replacement structures forward of the "commonline" and along the shoreline of Phillips Lake. The proposed replacement structures include a Single-Family Residence (SFR) and detached garage, both within the regulated shoreline buffer of Phillips Lake. The total existing development area forward of the "commonline" is ±3,942ft2 of building footprint and ±806ft2 of deck/concrete walkways. The proposed development is located mostly within the existing footprints with total areas of ±3,735ft2 of building footprint and ±728ft2 of deck/concrete walkways. The result is a net decrease in building footprint and deck/concrete walkways in front of the "commonline" of ±207ft2 and ±78ft2, respectively. The proposed replacement structures also result in a net decrease in building footprint within the 100ft shoreline buffer of ±339ft2. Mitigation sequencing has been followed to avoid, minimize, and mitigate impacts to the buffer area. Mitigation measures have been designed to offset the potential impacts of constructing the replacement structures on the ecological functions and fish and wildlife habitat of the shoreline buffer. Measures include best-management practices for construction, noxious weed removal, and planting a mitigation area of ±1,500ft2 with native trees, shrubs, and ferns. The objectives of this report are as follows: • Identify potential impacts of constructing the replacement structures on the shoreline buffer's ecological functions and fish and wildlife habitat. • Determine mitigation measures that would offset those impacts and result in no-net-loss to ecological functions and fish and wildlife habitat. 1 Project: 2024-HMP-002 February 2024 Arctos Environmental LLG y © Y1 \1 Figure 1:Vicinity Map of project Property Description & Project Background The subject parcel was recently combined from three previous lots. The resulting subject parcel is a combined 0.93 acres in size and located in section 5, Township 20 North, Range 2 West. The lot slopes from E Phillips Lake Loop Rd southeast to the shoreline of Phillips Lake. The lot has an existing SFR and garage as well as a SFR, garage, two carports, a boathouse, and a cabana that have already been removed. The project proposes replacing several of the buildings, mostly within the same footprints with the main exception being a new garage that has been moved farther from the Ordinary High-Water Mark (OHWM) of the lake. The proposed development changes the shape and location of the existing/previous building footprints but and overall reduction in total development footprint within the shoreline buffer, as well as the overall development footprint forward of the "commonline." The applicant also proposes making the development more conforming with current code by reducing the overall encroachment of the proposed development. Specifically, the boathouse that was waterward of the OHWM is being removed, and the replacement garage is ±30ft farther from the OHWM of the lake. There is some native vegetation scattered across the lot but a large amount of English Ivy, ornamental Saint John's wort, Himalayan blackberry, and scotch broom is dominant in different areas of the lot, especially the shoreline. 2 Project: 2024-HMP-002 February 2024 Arctos Environmental LLG Analysis of Potential Impacts Vegetated buffers serve an important role in protecting critical public resources from adverse impacts associated with development, as well as providing fish and wildlife habitat. Below are the potential adverse impacts to ecological functions associated with the construction of the proposed replacement structures within the shoreline buffer. - Loss of fish and wildlife habitat The development footprint of the proposed project within the shoreline buffer is an estimated ±339ft2 smaller than the original development footprints on this lot and located mostly within the original footprints. No loss of habitat is anticipated as long as the existing native vegetation is maintained. Most of the current vegetation on the lot consists of invasive species. - Impervious surfaces This project proposes reducing the overall impervious surface area on the lot which will decrease the storm water run-off and erosion potential. No native vegetation will be removed for this project and proposed mitigation plantings will improve the remaining buffer's ability to filter sediment and nutrients from runoff from the property. No increased risk of erosion is anticipated as long as construction BMPs prescribed in this report are followed. - Increased disturbance from noise pollution A temporary increase in noise from construction activities is likely to occur. but activities will be limited to daylight hours, and the project is located in a residential area where human noises are a daily occurrence. Also, no known nesting sites or individual occurrences of priority habitats and species have been identified near the project site. 3 Project: 2024-HMP-002 February 2024 Arc-to-, Environmental LLG - Solar input No trees will be removed in order to implement this plan. Trees planted within the mitigation areas will eventually contribute to shading the edge of the shoreline from excessive solar input as they mature, which will have a net benefit on the shoreline's micro-climate and fish and wildlife habitat. Mitigation Measures To avoid, minimize, and mitigate for the potential adverse impacts identified above, the following have been identified as appropriate measures for this project: - Minimizing/avoiding impact This project proposes avoiding impact by reducing the overall development footprint of the lot within the shoreline buffer and reducing the encroachment of several buildings by either removing them completely or moving them farther from the shoreline. - Best Management Practices for construction Construction activities related to this project will be restricted to favorable weather conditions and best management practices for reducing disturbance will be followed, including erecting silt fencing below the project area, and placing straw over any exposed areas until they are re-vegetated. Any equipment used will be checked daily for leaks and all fuel, lubricant, and chemicals will be stored off-site. - Clustering of development All activities related to this project will be clustered to the extent possible without impacting more of the stream and shoreline buffer than necessary. Equipment and materials will be stored outside the buffer when not immediately necessary for construction activities. 4 Project: 2024-HMP-002 February 2024 Arc-to-, Environmental LLG - Noxious weed removal All occurrences of Himalayan blackberry, English ivy, ornamental Saint John's wort, and scotch broom on the lot will be removed by hand. As much root material as possible will be removed with the plant. Weed debris will be bagged and brought to the landfill. Areas where noxious weeds are removed must be either re-seeded with a native grass mix, or planted with other native vegetation. - Mitigation area A ±500ft2 area along the shoreline currently dominated with ornamental Saint John's wort (see appendix for photos of the mitigation area) will be cleared of noxious weeds and replanted with native trees, shrubs, and ferns according to the planting guidelines below. The minimum number of native plants required to be installed in order to satisfy this requirement are as follows: o Trees: 5 o Shrubs: 20 o Ferns/groundcovers: 30 Planting Guidelines for the Mitigation Area Earthwork Machinery earthwork will be restricted to the minimum necessary to implement this plan; planting holes for specified vegetation installation will be hand dug. Native Plantings Native plantings will be installed within the mitigation area parallel to the edge of the shoreline/bulkhead to achieve the following minimum densities: Trees — 10' on center Shrubs — ±5' on center Ferns/groundcovers — ±4' on center The plan calls for installing single trees on 10ft centers, and single shrubs on ±5ft centers. The areas between the trees and shrubs will be filled with ferns or groundcovers on ±4ft centers. Exact placement of installed materials will be up to 5 Project: 2024-HMP-002 February 2024 Arc-to-, Environmental LLG the landscape installer, following the basic spacing pattern described above. Trees may be installed within 10ft of existing mature trees on site. Installed plants must be flagged to aid in monitoring visits. Native plants suitable for the mitigation area include, but are not limited to the following: Trees: Western red cedar (Thuja plicata) Shorepine (Pinus contorta) Shrubs: Salal (Gaultheria shallon) Oregon grape (Mahonia aquifolium) Vine maple (Acer circinatum) Evergreen huckleberry (Vaccinium ovatum) Ferns/groundcovers: Western swordfern (Polystitchum munitum) Wild strawberry (Fragaria virginiana) Kinnikinnick (Arctostaphylos uva-ursi) All planting should occur during winter dormancy. The optimum time for planting is from November to March. Installation Installation of the prescribed vegetation will be performed by experienced landscapers familiar with planting native vegetation in natural settings. Installation will be performed during the first winter planting season after approval of this plan. Installed plants will be flagged to aid in monitoring requirements. Fertilizing Due to the proximity of the mitigation area to the shoreline, NO fertilizer will be used during plant installation or maintenance. Maintenance Maintenance of the installations will be the responsibility of the property owner. Maintenance is to include any weeding or watering necessary to ensure plant survival for at least five years after the date of installation. 6 Project: 2024-HMP-002 February 2024 Arctos Environmental LLG Monitoring A baseline monitoring report will be submitted to the Mason County Planning Department when all construction is complete and mitigation measures have been implemented. This initial report will establish photo points and document the location and general size of installed vegetation. An annual monitoring report will also be submitted to the county for 5 years to document the success of the mitigation area. If the survival rate of installed vegetation falls below 90% in the first five years, the area will be re-planted to meet the original target densities. The 90% threshold will be assessed annually at each monitoring visit and replanted the following planting season if required. The reports will also include photos from the photo points established in the baseline monitoring report and document any occurrence of noxious weeds in the vicinity of the project site or mitigation area. Any noxious weeds observed will be removed. Summary This report details a Habitat Management Plan (HMP) for the above referenced Property in Mason County, Washington. The purpose of this report is to address potential adverse impacts from the construction of several proposed replacement structures with a total net decrease in development footprint of ±339ft2 within the regulated buffer of the shoreline of Phillips Lake. Mitigation measures have been designed to offset the potential impacts of constructing the project on the ecological functions and fish and wildlife habitat of the shoreline buffer. Measures include best-management practices for construction, noxious weed removal, , and planting a ±500ft2 mitigation area with native vegetation in an area along the shoreline currently dominated by invasive species. Proper implementation of this plan will result in no-net-loss of ecological function to the buffer from the development proposed by the applicant. Project: 2024-HMP-002 February 2024 Arc+os Environmen+ol LLG References Guard,J. 1995.Wetland Plants of Oregon &Washington. Lone Pine Publishing. 240 pp. Edmonton, Alberta, Canada. Penttila, D. 2007. Marine Forage Fishes in Puget Sound. Puget Sound Nearshore Partnership Report No. 2007-03,Seattle,WA. Pojar,J. and A. MacKinnon. (1994). Plants of the Pacific Northwest Coast (Revised Edition 2014). Lone Pine Publishing. 528 pp.Vancouver, British Columbia, Canada. WDFW. 2002. Integrated streambank protection guidelines. Washington Department of Fish and Wildlife, Washington Department of Transportation, and Washington Department of Ecology. Posted on Washington Department of Fish and Wildlife web site: https://wdfw.wa.gov/sites/defa u It/files/p u b I ications/00046/wdfw00046.pdf WDFW. 2001. Over-Water Structures: Freshwater Issues.Washington Department of Fish and Wildlife, Washington Department of Transportation, and Washington Department of Ecology. Posted on Washington Department of Fish and Wildlife web site: https://wdfw.wa.gov/sites/default/files/publications/00052/wdfw00052.pdf 8 Project: 2024-HMP-002 February 2024 Arc-to-, Environmental LLG Appendix: Site Photos } t s TIP ' INt E w tfd i t4, a " JI Site Photo 1:Image showing a portion of the proposed mitigation area along the shoreline of Phillips Lake. 9 Project: 2024-HMP-002 February 2024 Ar-r+os Environmental LLG i 4a Site Photo 2:Image showing a portion of the proposed mitigation area along the shoreline of Phillips Lake. 10 Project: 2024-HMP-002 February 2024 Arctos Environmental LLG Vw 44. it . � �: # ;``.� �1•'G -�r; � -'i .`� "� - g.�, $V -�� yam-�E. S' » .'S` Y� f j � "�.•� T.� '� '�. �r�. "fit, xR �a:P 8 R �4 Site Photo 3:1mage showing the proposed mitigation area along the shoreline of Phillips Lake. 11