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' Upstream analysis: <br /> Since the site is at a relative high-point,there is no concentrated flow onto the site. <br /> ' Downstream Analysis: (refer to basin map in the appendix) <br /> Controlled runoff leaves the pond and travels northeasterly in a pipe until it discharges in a level <br /> ' spreader toward a wetland on the adjacent property;thence travels southerly in a vegetated swale <br /> from the wetland until it is collected in the City of Everett public storm system in Holly Drive. <br /> ' Existing Soils conditions: <br /> 1983 USDA Soil Survey of Snohomish County Area data: <br /> ' (see appendix) <br /> Soil name/hydrologic group: Alderwood#5/group C. <br /> ' The stormwater site plan was developed based on the above data and requirement to bring the <br /> additional site improvements to code compliance. <br /> ' MR-2 SWPPP: <br /> Since the site disturbs less than 1-acre, a small parcel erosion and sediment control plan <br /> ' (SPESCP is applicable. This section constitutes the narrative portion in support of the SWPPP. <br /> (see SPESCP in the appendix) <br /> General Construction Sequence: <br /> 1. Attend pre-construction meeting <br /> 2. Flag clearing limits <br /> ' 3. ' Install silt fence and straw wattles <br /> 4. Install stabilized construction entrance <br /> ' 5. Clear site per plan <br /> 6. Stabilize exposed soils <br /> 7. Inspect, maintain and adjust BMPs as needed <br /> ' 8. Remove all BMPs within 30 days after final site stabilization and County has <br /> approved removal. <br /> ' Each of the 12 applicable SWPPP elements has been addressed as follows: <br /> 1. Mark clearing limits—clearing limits will be marked prior to construction to <br /> ' preserve native vegetation. <br /> 2. Establish Construction access-C.O.E. 4201 rock entrance pad <br /> 3. Control flow rates—properties and waterways downstream will be protected by <br /> ' silt fence-C.O.E#214 - BMP C233 and plastic covering-BMP C123 <br /> 4. Install sediment controls—silt fence-C.O.E.#214-BMP C233 and plastic covering- <br /> BMPC 123 will be used. <br /> ' 5. Stabilize Soils—all exposed and unworked soils shall be stabilized by plastic <br /> covering-BMP C123. <br /> 6. Protect Slopes—plastic covering-BMP C 123 will be used. <br /> ' OCE Pioneer Cable parking <br /> Drainage report rev.#1 February,2016 <br /> OCE job#1509 December,2015 <br />