12-12-2022 City Council Packet - Laserfiche WebLink

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sets, full size (22 inches by 34 inches); and one electronic copy in a .pdf ^no plan cot 0 n aGGOrdanGe with aplplicable zoning and subdivision provisions of Gity code. format. All plan sets shall also be submitted electronically in a .dwg format or as otherwise determined by the City Engineer. The minima rn information req uiromontc of the NPDF=S permit requirements and in ado the following information• (a) A grading, erosion and sediment control plan and, for projects that require a NPDES permit, a stormwater pollution prevention plan (SWPPP) is row; (b) Stormwater management plan including existing and proposed hydrologic calculations for total runoff volume and peak discharge rates as described in this chapter, including: 1. A narrative including a project description, discussion of BMP selection, incorporation of infiltration BMPs, and revegetation plan for the project site; 2. Delineation of all drainage areas, including contributing runoff from off -site areas, proposed and existing subwatersheds on -site, emergency overflows, and drainage ways; 3. Existing, proposed, and total amount of impervious surfaces created by the project; 4. Existing and proposed runoff curve numbers; 5. Time of concentration used in calculations; and 6. Existing and proposed total runoff volume and peak discharge rates for the two-, ten-, and 100-year critical events utilizing NOAA Atlas 14. (c) Property of lines and delineation of lands under ownership of the applicant. (d) Locations of all stormwater management practices, infiltration areas, and areas not to be disturbed during construction. (e) Location of all drain tiles on the project site shall be identified. (f) Location and engineered designs for structural stormwater management practices including stormwater treatment devices that remove oil and floatable material (e.g., basin outlets with submerged inlets). (g) Normal water level, high water level, and emergency overflow elevations for the site and all ponding systems related to NAVD88. (h) Identification of existing and proposed one -foot contour elevations within the project site related to NAVD88. (i) Geotechnical analysis including soil borings at all proposed stormwater management facility locations ASTM D5921 and D2488. Q) Provisions for groundwater management (dewatering), including subsurface drains, disposals, ponding and flood controls.