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Describe drainage flow paths (direction, location): <br /> Runoff sheet flows from the East to West of the project site and is conveyed by the <br /> existing trench drain and catch basin near Building 40-55. Site drainage is conveyed <br /> into the existing storm drain system where it is routed north into the upper basin located <br /> cni,th of Ccou.n,i nrl cn+nrc 4hc Dn,A,rror hit ill (`-i,Irrh Thc, Dn,A,rtcr NAiII r'iilrh <br /> Are there Critical Areas?What are they and where are they located relative to your project?: <br /> There are no critical areas within one-quarter mile of the project site. <br /> Task 2: Describe proposed project <br /> Describe your proposed project: <br /> The intent of this project is to modify the existing Boeing 40-55 Building and rail yard to <br /> support the deliveries of 737 fuselages as part of the new 737 final assembly line. The <br /> improvements include extending the existing rail track inside the building approximately <br /> 185' eastward out into the Rail Yard. retrofit the existina door. evaluation of the Rail <br /> How will your project change the existing condition?: <br /> Existing concrete pavement will be removed to accommodate the new exterior track <br /> and surface pavement replacement as required to maintain existing slopes in the Rail <br /> Yard. The new track slab is flat near the building and extends approximately 165' into <br /> tha Rail Yarrl at a cInna of 1 RFC/ Piinnff frnm tha trarkc will drain into a navo track <br /> Describe roofs, patios,driveways, or structures added: <br /> A new track drain will be constructed within the new track slab to convey drainage. Two <br /> short segments of trench drain will be constructed to convey drainage on the North and <br /> South side of the proposed track slab. <br /> How will stormwater be managed?: <br /> Drainage from the track drain and trench drains will connect to the existing storm drain <br /> line that ties into the existing catch basin and routed North into the upper basin. <br /> Describe how the project will affect existing drainage systems onsite or on adjacent properties <br /> or both: <br /> The proposed improvements consists of replacing existing pavement with new <br /> pavement. Furthermore, there is no change in the amount of impervious surfaces on <br /> site and will have minimal to no effects to the existing drainage system. <br /> City of Everett Public Works <br /> Small Project Stormwater Site Plan Report-Dec 2019 5 <br />