1808 MERRILL CREEK PKY 2016-01-01 MF Import

� INTRODUCTION. The proposed project is to develop the approximately 363 acre parcel into a light industrial site comprised of two single story buildings and accompanyin� parking areas. The ittegularly shaped parcel is locited on the south side of Merrill Creek Parkway just east of Narbeck Creek (see Vicinity Map on following page). More generally, the site lies within Section 2, Township 28 North, Range 4 East, W.M., in Snohomish County, Washington. The site is currently undeveloped, but lias recently been cleared by a previous developer. The surrounding parcels are vegetated with second growth forest and an undersrory typical of Western Washington forests. Slopes on the site range from approximately 2 to over 40 percent. According to the Soil Survev of Snoliomish County Area, the site is underlain with Alderwood sandy loam soil. Alderwood soil is classified by the Soils Conservation Service as a type 'C' soils (see Soils Map located in the Appendix). DRAINAGE CONCEPT Three facilities have been provided to control runoft; ensure water quality, and to resrore the adjacent creek corridor. The majority of the site will be detained in a large wet pond/detention pond. The wet pond/derention pond has been designed ro the City of Everett's standards for a wet pond with an accompanying emergent veget3ted swale. To enhance the creek corridor, a portion of the roof drains have been directed ro an area located on tlie west side of die site Here, Uie ..ean" roof top runufT is detained in a series of shallow �vetland ponds to enhance the constructed wetland. The last facility is a detention pipe ro detain the runof�from the proposed site access road which will not be able to be detained in the large detention pond. Water quality enhancement will be provided throush the construction of a roadside grass-Iined swale. STORM DRAINAGE REPORT FOR INTRA�i'EST-SEA�i'AY - PAGE t