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„ Carroll & Lange <br /> 165 South Union Blvd., Suite 156 <br /> " Lakewood, Colorado 80228 <br /> 303!980-0200 <br /> Faz: 303/980-0917 <br />PROJECT St. Vrain Lakes <br />Subject Riser Pipe -Sedimentation Pond 7 <br />Job. No. <br />Date <br />Sheet <br />ey <br />3075 <br />06/06/06 <br />1 of 1 <br />MMU <br />Release Water Quality Capture Volume over 40 hours <br />Dwq = Stormwater Capture Water Surface Elev. -Sedimentation Volume W ater Surface Elev. <br />Dwq = 4880 ft - 4878.71 h = 1.30 ft <br />Area Required per Row of Holes, A =WQCV/Kao <br />Kao = 0.013(Dwq)Z + 0.22(Dwq) - 0.10 <br />Kao = 0.20797 <br />WQCV = 0.62 ac-ft <br />A = 2.981199 sq-inch <br />Determine Hole Size and Number of Holes per Row (Figure 5-2) <br />Try : 3 Columns of 1 1/8" Hales with 8" Riser Pipe <br />(0.99 sq-inch/hole)(3 hole= 2.98 sq-inch <br />Determine Number of Rows <br />Number of Rows =Dwq / (Minimum Row Spacing (4 inches) + Dia. Hole) <br />Number of Rows = 3.12625 Use 3 Rows <br />Use 3 Rows of 3 x 7 718" Hotes with 8" Riser Pipe <br />Sediment Basin.xls <br />