7702 RAINIER DR 2022-04-05 - Laserfiche WebLink

• Type Ns Stream Cowardin: Riverine, Intermittent, Streambed,Vegetated (R4SB7) City of Everett Rating:Type Ns stream, 50' Buffer This stream did not contain water at the time of our September 22, 2015 site investigation. This intermittent (Type Ns) stream drains north through the wetland along the western border of the subject site. This stream does not support fish (not Type S or F), and is mapped as an unknown piped stream and a tributary to East Fork Pigeon Creek No. 1 on the City of Everett Critical Areas Map 1. In the City of Everett, when the buffer of a Type Ns stream is sparsely vegetated, un-vegetated, or is vegetated with invasive species, the standard buffer is 75 feet. The subject buffer will be reduced to 50 feet through buffer enhancement as provided by EMC 37.170(C). Non -Wetland Typical vegetation in the non-wetland portion of this site is represented by scattered trees including Douglas fir (Pseudotsuga menziesii, FacU), western red cedar (Thuja plicata, Fac), western white pine(Pinus monticola, FacU), noble Fir (Abies procera, FacU), and paper birch (Betula papyrifera, Fac), with and understory comprised of maintained lawn in the center of the site and an area of what appears to have once been lawn but is not currently maintained in the western portion of the property. Vegetation in the maintained lawn is dominated by colonial bentgrass (Agrostis tenuis, Fac) and square gooseneck moss (Rhytidiadelphus squarrosus, Nol/Upl), with lesser amounts of hairy cat's-ear (Hypochaeris radicata, FacU) and English ivy (Hedera helix, Nol/Upl). Vegetation in the area of abandoned lawn is represented by holly (Ilex aquifolium, FacU), Sitka mountain ash (Sorbus sitchensis, FacU), yellow archangel (Lamiastrum galeobdolon, Nol/Upl), sword fern (Polystichum munitum, FacU), and orchard morning glory (Convolvulus arvensis, Nol/Upl).Typical soils in the non-wetland portions of the property have a Munsell color of very dark greyish brown (10YR 3/2) with a texture of sandy loam from 0 to 18 inches below the surface. Soils were dry throughout the profile during our September 2015 site visit. NATURAL RESOURCE CONSERVATION SERVICE SOILS DESCRIPTION: The Natural Resources Conservation Service (NRCS) mapped the subject property as being underlain by McKenna gravelly silt loam,0 to 8 percent slopes in the east and Alderwood-Urban land,0 to 8 percent slopes in the west. The NRCS describes McKenna gravelly silt loam as a moderately deep poorly drained soil in depressional areas and drainageways on till plains. It formed in glacial till. Typically the surface layer is very dark grayish brown gravelly silt loam about 8 inches thick.The subsoil is brown and light olive brown gravelly silt loam about 25 inches thick. Glacial till is located at a depth ranging from 20 to 40 inches. Included in this unit are small areas of soils that have slopes of more than 8 percent. Also included are Alderwood and Tokul soils on till plains, Everett soils on terraces Acre Environmental Consulting, LLC October 29,2015 CAS&Buffer Mitigation Plan for—Kymera Inc.-7702 Rainier Drive Everett,WA Page 6