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Existine Stormwater Treatment and Detention Facilities <br />Approximately 20% of the Existing PDA has been provided with water quality <br />treatment via a biofiltration swale constructed in 1998-during playfield upgrades. <br />{ In addition, the 1998 playfield upgrades provided sub -drainage for about one-halfof <br />the total playfield areas. Sub -drainage does provide some attenuation of existing <br />peak ilowrates. <br />Developed Site Conditions <br />The Everett Public Schools proposes to construct a new parking lot, two new access <br />points, one redeveloped access point, and also proposes to provide minor sidewalk, entry, <br />striping and signage improvements. <br />Specific elements of the project include the following: <br />AREA A — NORTHWEST PARKING <br />Northwest Parkin Area — A new parking lot is proposed located at the <br />northwesterly portion of the school site and is adjacent to SR-527. The <br />daycare/church and existing parking areas are planned to be demolished to <br />accommodate the new parking improvements. <br />North Access Improvement — Everett Public Schools intends to demolish the <br />existing child care/church facility north of the school parking lot and construct a new <br />private student and vehicular access from 127th Place SE to the new northwest <br />parking lot. <br />AREA B — LOT 71 SOUTH ACCESS <br />I ot7l South Access Improvement — Everett Public Schools intends to acquire Lot 7 <br />and construct a new private student and vehicular (bus) access from 129t Place SE to <br />the Bus Loading Area. <br />South Bps LoarituplPorking Area — This parking area is located at the southwest edge <br />of the school site and is currently operating as a bus -loading zone. Except for <br />removal of pavement where Lot 7 Access improvements tie into existing pavement, <br />only sidewalk, striping and signage improvements are anticipated. <br />AREA C — WEST PARKING LOT = SWAP or EQUIVALENT AREA <br />Wesr Parkint,• Area — This parking area is located at the westerly edge of the school <br />site and is adjacent to SR-527. Sidewalk, striping and signage improvements are <br />anticipated. <br />SR-527 Access Inrprovenrents — The northerly entry from SR-527 to the West <br />Parking Lot is proposed to move approximately 80 feet south. The southerly access <br />from SR-527 to the West Parking Lot will not be improved with this project except <br />for anticipated striping and possible signage improvements <br />Targeted Ihainage Rcpnn for Everett Public Schools Section 2 — Risk & Erosion Control <br />Sil•er lake Elementary Parking Lot Expansion January 6, 20 <br />03 <br />By: Pertect Engineering Paoo4or7 <br />