Laserfiche WebLink
II Design Procedure Form: Extended Detention Basin (EDB) - Sedimentation Facility II <br />Sheet 1 of 3 <br />Designer: Matthew Young <br />Company: Applegate Group, Inc. <br />Date: January 22, 2008 <br />Project: Parkdale Sand and Gravel Pit - Basin-F Minimum Sediment Pond Size <br />Location: Fremont County, Colorado <br />1. Basin Storage Volume <br /> le = 5.00 % <br />A) Tributary Area's Imperviousness Ratio (i = le / 100) i = 0.05 <br />B) Contributing Watershed Area (Area) Area = 30.400 acres <br />C) Water Quality Capture Volume (WQCV) WQCV = 0.04 watershed inches <br />(WQCV =1.0 * (0.91 *13-1.19*12+0.78*I)) <br />D) Design Volume: Vol = (WQCV / 12) * Area * 1.2 <br />Vol = <br />0.1099 <br />acre-feet <br />2. Outlet Works <br />A) Outlet Type (Check One) Orifice Plate <br /> Perforated Riser Pipe <br /> x Other: Pump <br />B) Depth at Outlet Above Lowest Perforation (H) H = feet <br />C) Recommended Maximum Outlet Area per Row, (Ao) Ao = square inches <br />D) Perforation Dimensions: <br />i) Circular Perforation Diameter or D = inches <br />ii) Width of 2" High Rectangular Perforations W = inches <br />E) Number of Columns (nc, See Table 6a-1 For Maximum) nc = number <br />F) Actual Design Outlet Area per Row (Ao) Ao = square inches <br />G) Number of Rows (nr) nr = number <br />H) Total Outlet Area (A.? Ao, = square inches <br />3. Trash Rack <br />A) Needed Open Area: A, = 0.5 * (Figure 7 Value) * Aot A, = square inches <br />B) Type of Outlet Opening (Check One) < 2" Diameter Round <br /> 2" High Rectangular <br /> Other: <br />: Figure 6a): <br />Round opening (Ref <br />Smaller <br />F <br />2" <br />C <br />. <br />, <br />, or <br />or <br />) <br />i) Width of Trash Rack and Concrete Opening (W°onc) <br />from Table 6a-1 Woonc = inches <br />ii) Height of Trash Rack Screen (HTR) HTR = inches <br />Quarry - Basin F Sediment Pond.xls, EDB 1/22/2008, 8:48 AM