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HomeMy WebLinkAboutSHR2021-00022 CANCELLED - HMP Habitat Managment Plan - 11/16/2021 Habitat Management Plan Parcel#22105-51-00028 Site Address: 3740 E Mason Lake Dr W, Grapeview, WA 98546 Proposed by Joseph Builders NW Ilc For Peter and Rebecca Quist During Construction • Perform any excavation and grading work during dry weather • Install silt fencing around the work area to prevent erosion and siltation of marine and riverine waters. • Minimize amount of erodible soils at any given time to the maximum extent feasible. • Check all equipment daily for leaks. Refueling and lubrication of equipment should occur offsite. Don't store any fuel, lubricants, chemicals, or hazardous substances overnight within the project area. • Do not apply any chemicals when there is a possibility of rain. • Comply with all permits and requirements of the government authority or agency, Stream Buffer Protection Existing trees and other native vegetation within the shoreline buffer should again be left undisturbed in areas outside of the proposed construction zone. Any storage or stockpiling of construction materials associated with construction or ensuing occupancy of the residence should take place within a designated construction zone to limit impacts to the buffer. The banks and channel of the shoreline should not be used for foot traffic since this would damage vegetation and increase erosion along the shoreline. Construction Phase Best Management Practices An increase in the amount of impervious surface is a concern whenever new buildings are constructed. Impermeable surfaces, such as roads, rooftops and drive ways, cause more rain to run off at accelerated rates and less water to infiltrate back into the soil (Leedy and Adams 1984).To prevent increased erosion and impacts to water quality, runoff from the building and other impervious surfaces a storm water management plan that diverts this runoff away from the ground surface and back into the ground has been established. Best Management Practices (BMPs) need to be adhered to throughout the construction phase. • Appropriate erosion control devices, such as silt fencing, mulch berms, and erosion control matting should again be used if needed during all aspects of the construction phase to mitigate potential erosion and runoff into the stream. • The most important goal during the construction phase is to consolidate the time period in which heavy earthmoving machinery is used. Earthwork activities should be implemented during the driest season of the year to minimize the risk of erosion-relate impacts to the stream. Any work requiring use of this type of equipment (such as site grading, road building, grubbing, cutting and filling) should also be implemented over short periods or events. This should avoid continued and prolonged disturbance of the environment with heavy equipment, as would be the case if the work occurred over multiple and/or unconsolidated events. • Construction activities should be confined to discrete areas of the site to minimize disturbance to native vegetation in the buffer. • No construction debris or supplies should be placed in existing forested areas or anywhere along the shoreline. • Coinciding with, or immediately subsequent to the completion of the construction work,the restoration and stabilization of bare ground should occur. Restoration and stabilization phases include the application of a native seed mix and landscape stabilization of any cut and filled areas. Native species of plants should be used in transition zones between the construction area and undisturbed native vegetation. The suggested BMP's focus on reducing increases in impervious surfaces, preserving hydrologic functions, and controlling potential adverse impacts to water quality. • Clearly mark clearing limits with orange construction fencing; • Install silt fencing at the clearing limits to prevent surface runoff, erosion , and water quality degradation; • Cover or mulch bare areas to prevent surface erosion • Hydroseed disturbed areas with a slurry of native grass seed, mulch, and tackifier as soon as possible following completion of construction and at a minimum before the onset of fall rains; Re-vegetation and planting Earthwork No machinery earthwork will be necessary to implement this restoration plan; planting holes for specified vegetation installation will be hand dug. No additional clearing or grading should be required for site restoration. Habitat Conservation Measures In general, proposed measures to protect habitat focus on promoting natural succession of native plant communities and increasing structural diversity and complexity. • Minimize clearing and conversion of forest habitats to other uses, particularly within the shoreline buffers; • Retain larger conifers wherever possible; if trees are removed, use/retain large woody debris (LWD) in native plant communities to be retained. Retained LWD can be installed vertically or horizontally to provide habitat for woodpeckers, including pileated woodpecker. • Retain and/or salvage downed large woody debris and western red cedar stumps; • Enhance native plant communities by removing invasive and non-native species, such as Himalayan blackberry. On-going homeowner responsibilities Suggested BMP focus on reducing increases in impervious surfaces, preserving hydrologic functions, and controlling potential adverse impacts to water quality. • Infiltrate clean runoff from impervious surfaces such as roofs using infiltration trenches to maximize groundwater recharge.Avoid using roofing materials, such as zinc-coated products, that could contribute metals to surface waters; • Properly maintain septic system to avoid septic system failure; • Landscape with native plants and use mulch and drip irrigation to reduce water consumption, conserve water, and reduce cumulative help maintain instream flows in downstream surface waters; • Use low flow toilets and shower heads to conserve water and reduce water consumption; • Avoid use of herbicides and pesticides,which may adversely affect native flora and fauna, as well as pest species; • Use porous pavement or gravel instead of asphalt or concrete for the driveway to reduce stormwater runoff; use biofiltration swales or infiltration trenches to promote removal of pollutants and promote groundwater recharge. Home Owners Best Management Practices Residents living by the unique stream environments have a continuing responsibility for maintaining the conditions that provide the function of the stream. • Soil or yard waste must not be dumped anywhere within the buffer so that it may enter the stream. • Runoff from the building and other impervious surfaces should be directed to sub-surface trenching that diverts runoff away from the ground surface and back into the ground, or according to the stormwater management plan that has been approved for the site.The erosion of soil or the forming of channels should be prevented.These efforts will prevent increased erosion and impacts to water quality. • The occupants of the residence should also promote landscaping with native species. • Landscaping around the construction zone should be compatible and blend with the native buffer. Stream Buffer Protection • Existing trees and other native vegetation within the stream buffer should again be left undisturbed. • Any storage or stockpiling of materials should take place outside of the buffer to limit impacts to the buffer. • The banks and channel of the stream should not be used for foot traffic since this would damage vegetation and increase erosion along the stream channel. • Logs that currently exist within the stream channel should not be removed or disturbed and future downed woody debris should be encouraged. Functions and values of the forested area between the proposed residence and the marine shoreline should be maintained through the following measures. • Do not remove overstory trees(view corridors can be established or maintained by limbing the trees to the minimum extent necessary) • Shoreline access should be limited to a 3-foot wide path,with stairs when necessary, to concentrate all foot traffic through a single corridor. • Species such as English Ivy and Himalayan blackberry should be removed and prevented from further invading the site.This can be accomplished through persistent cuttings during the growing season. • Sites where invasive species are removed should be replanted using native species.