11921 SILVER LAKE DR 2022-04-05 - Laserfiche WebLink

width required for Wetland A equals 80 feet. Please see the attached Map Sheet CA1.00 for a depiction of Wetland A, and see the discussion below regarding overlapping buffer widths. The OHWM of Silver Lake is located among the extreme northeastern portions of the subject properties as shown on Map Sheet CA1.00. Per EMC 19.37.160.B, "Silver Lake shall be protected as required by the Shoreline Master Program". Per EMC 19.37.170.E.a, lakes used by salmonids require a standard buffer width of 100 feet, measured from the delineated OHWM of the lake. Therefore, the standard buffer width required for Silver Lake equals 100 feet, measured from the delineated OHWM of the lake. Please see the attached Map Sheet CA1.00 for a depiction of the OHWM of Silver Lake, and view the standard 100-foot buffer from the lake OHWM. Please also see the discussion below regarding overlapping buffer widths. Discussion Regarding Overlapping Critical Areas Buffers: As mentioned above, the project vicinity includes multiple Critical Areas which are regulated pursuant to the Everett Municipal Code Critical Areas Regulations. When two or more Critical Area buffers overlap, the more restrictive buffer typically applies, as required per EMC section 19.37.170.E. For this particular project, the more restrictive buffer is derived from the OHWM of Silver Lake as shown on Map Sheet CA1.00. Natural Resource Conservation Service Soils Description: The Natural Resources Conservation Service (NRCS) mapped the subject property as being underlain by Alderwood-Urban land complex (2 to 8 percent slopes).Alderwood-Urban land complex (2 to 8 percent slopes) is mapped among the southern portion of the property. Alderwood-Urban land complex is typically formed in till plains with a parent material of basal till. The depth to the restrictive feature is typically between 20 to 40 inches below the surface. This soil series is moderately well drained, the frequency of flooding and ponding is none and the available water capacity in the soil profile is low. The typical soil profile is gravelly ashy sandy loam 0 to 7 inches, very gravelly ashy sandy loam from 7 to 35 inches and gravelly sandy loam from 35 to 60 inches. Minor components include McKenna soil series (2 percent), Norma soil series (2 percent) and Terric soil series(2 percent). EXISTING ECOLOGICAL FUNCTIONS AND VALUES ASSESSMENT The methodologies for this functions and values assessment are based on professional opinion developed through past field analyses and interpretations. This assessment pertains specifically to the subject wetland and lake, but is typical for assessments of similar systems throughout the Puget Sound region of western Washington. Wetlands in western Washington provide valuable ecological functions including stormwater control, water quality, and wildlife habitat functions to their surrounding environment. The subject wetland provides particularly important ecological functions due to its landscape context(adjacent to a regulated Shoreline of the State). As previously noted in this report, the wetland extends off-site approximately as depicted on Map Sheet CA1.00. As evidenced by a score of 8 for Water Quality Functions, Wetland A provides a high level of water quality functions. The dense herbaceous vegetation on the site provides an increase in water Wetlands&Wildlife, Inc. July 27,2020 Critical Areas and Shoreline Report—Schireman Proposed House Additions Incorporated City of Everett,WA(Tax Parcel Nos.00574900000200&00574900000302) d'agc S