Laserfiche WebLink
06-30-1995 10:23 784 3114 MOUNDSVIEW - PUBLIC WORKS P.03 <br /> 01:140.'95 11:08 FAS <br /> ST. PAUL QU003:005 <br /> • <br /> • <br /> Mr.Paul Harrington <br /> June 30, 1995 <br /> Page 2 <br /> Watershed Management Organization by William W.Walker. His methods meet requirements of <br /> the Metropolitan Council and the City's LWMP. Table 1 summarizes the results. <br /> Table 1 <br /> Estimated Retention Fond Sizes for Each Lot <br /> Storage Volume Approximate Area Total Lot <br /> Required Required Area <br /> Ls?S LAc-Ft,I (Acresl Ldt_S_ <br /> 1 0.55 .21 3.94 <br /> 2 0.34 .13 2.59 <br /> 3 0.39 .15 2.85 <br /> • <br /> In order to evaluate the feasibility of the City providing detention storage in Outlot A, a computer <br /> model was ran to determine existing and proposed flow rates. The allowable storage in Outlot A <br /> • was estimated based on the City's contour maps. Additional storage was assumed to exist in Lots <br /> 1, 2 and 3 based on the proposed plat for the Bridges Technology Center and contour map. The <br /> results of the analysis area summarized in Tabies 2 and 3. <br /> Table 2 <br /> Storage Area Assumptions <br /> Elevation Area Storage Volume <br /> (Feett LA cosi f Ac-Ft.l <br /> 902 1.12 0.0 <br /> 904 2.78 3.9 <br /> 906 3.84 10.5 <br /> Table 3 <br /> Flow Rate Determinations <br /> Qin Qout 100-Year Elevation <br /> oaiton Lfe ttl Lsfgl (sal <br /> Existing 10 --No ponding— <br /> Future 81 10 903.2 <br /> SNote: Outlet assumed to be a 3 foot weir structure,storm distribution was an SCS Type II, <br /> with AMC condition 2. <br />