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2.4.3 Non-wetland Areas Vegetation in non-wetland areas of the site is mostly composed of maintained lawn and landscaping around the existing building. The forested non-wetland area in the eastern portion of the site is dominated by black cottonwood (Populus balsamifera; FAC), red alder (Alnus rubra; FAC), Himalayan blackberry (Rubus armeniacus, FAC), salmonberry (Rubus spectabilis; FAC), bracken fern (Reridium aquilinum; FACU), common dandelion (Taraxacum ofcinale; FACU), and grasses (Agrostis sp.). Soils in non-wetland areas are very dark brown(IOYR 2/2) silt loam from 0 to 4 inches below the surface. Between 4 and 16 inches, soils are dark yellowish brown (IOYR 3/4) gravelly loam. Soils in non-wetland areas were dry during both site visits and no secondary hydrology indicators were observed. 2.5 WILDLIFE The on-site wetland and stream complex provide a low level of habitat functions. The critical areas and associated buffer contain resources such as food,water, thermal cover, and hiding cover in close proximity. Their edges provide a movement corridor for wildlife. No mammalian species were detected during our on-site investigations in 2022. Strong avian activity was absent, though given the habitat available, it is expected that the following avian species use the area: American crow (Corvus brachyrhynchos), American robin (Turdus migratorius), house finch (Carpodacus mexicanus), black-capped chickadee (Poecile atricapillus), dark-eyed junco (junco hyemalis), northern flicker (Colaptes auratus), hairy woodpecker (Picoides villosus), red-breasted nuthatch (Sitka canadensis), brown creeper(Certhia americans), and red-tailed hawk(Buteo jamaicensis). Other wildlife expected to use this site include: pacific tree frog (Hyla regilla), northwestern salamander (Ambystoma gracile), and rough- skinned newt (Taricha granulosa). These lists are not meant to be all-inclusive and may omit species that currently utilize or could utilize the site. No threatened or endangered species are known to be associated with this property. 3.0 BUFFER REQUIREMENTS AND PROPOSED MODIFICATIONS 3.1 BUFFER WIDTH Th on-site wetland is classified as a Category III wetland with a low habitat score of 5. Category III wetlands with low habitat scores receive standard buffers of 80 feet per Table 37.2 of EMC 19.37.110(A). The applicant is proposing to employ the general mitigation measures described in EMC 19.37.110(C). When the general mitigation measures are applied, the reduced buffers provided in Table 37.3 are allowed,which reduces the wetland buffer to 60 feet. The stream buffer is 75 feet regardless of the reduced wetland buffer. The existing access road on the south side of the wetland/stream complex does not allow for the full prescriptive buffer widths. The road has been present since before 1990, so it is allowed to be maintained per EMC 19.37.050(A)(1)(k). No changes to the road are proposed. 3.2 EMC 19.37.110(C) GENERAL MITIGATION MEASURES As described in Section 3.1 above, the application of the reduced wetland buffer widths provided in Table 37.3 requires the implementation of the general mitigation measures provided in EMC 19.37.11O(C). The following measures will be applied to this project. Chelsea Heights 9 Critical Area Study &Buffer Enhancement Plan WRI#22101 October 10, 2022