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9_Storm Sewer Conveyance Sizing_Santa Vera Apts_04-04-2025Project:Client:Date:Engineer:Rain Event: 10 yearfrom to full actualOCS-1 to MH-100 is a 12" (HDPE) rate control pipe for controlling discharge from the stormwater management basins. It is also sized consistently with matching the existing, restricting, 12" RCP stub provided to the site.Drain Basin-200 FES28,150 80%0.65 0.84 0.543 7.00 0.00 7.00 6.443.5084 15 0.50%4.543.7 4.1 0.8Drain Basin-307 Drain Basin-3062,765 50%0.06 0.68 0.043 7.00 0.00 7.00 6.440.2858 12 0.86%3.284.2 2.5 0.2Drain Basin-306 Drain Basin-3051,940 30%0.04 0.57 0.068 7.00 0.38 7.38 6.440.4454 12 0.81%3.194.1 2.9 0.3Drain Basin-305 Drain Basin-3042,940 60%0.07 0.73 0.160 7.00 0.31 7.31 6.441.0353 12 0.81%3.194.1 3.6 0.4Drain Basin-304 Drain Basin-3033,060 60%0.07 0.73 0.322 7.00 0.25 7.25 6.442.0853 12 0.81%3.194.1 4.3 0.6Drain Basin-303 Drain Basin-3022,740 60%0.06 0.73 0.639 7.00 0.20 7.20 6.444.1253 15 0.81%5.784.7 5.1 0.8Drain Basin-302 Drain Basin-3019,470 60%0.22 0.73 1.391 7.00 0.17 7.17 6.448.96176 15 1.96%8.997.3 8.4 1.0Drain Basin-301 MH-3001,990 100%0.05 0.95 2.667 7.00 0.35 7.35 6.4417.1710 24 2.00%31.8010.1 10.4 1.0MH-300 FES0- 0.40 2.667 7.00 0.02 7.02 6.4417.1772 24 0.90%21.336.8 7.5 1.4Drain Basin-301-A FES2,570 90%0.06 0.90 0.053 7.00 0.00 7.00 6.440.3460 12 0.33%2.032.6 1.9 0.3Drain Basin-402 Drain Basin-4007,560 100%0.17 0.95 0.165 7.00 0.00 7.00 6.441.06136 12 2.60%5.717.3 5.6 0.3Drain Basin-400 FES4,160 100%0.10 0.95 0.256 7.00 0.41 7.41 6.441.6572 12 2.50%5.607.1 6.2 0.4Pipe Run 400Pipe Run 301 slope (%) pipe diameter (in)pipe capacity (cfs) trib area (ac) length (lf) runoff coeff. (C) Tc (min)intensity (in/hr)time of flow (min)T (min) sum CA (ac) runoff (cfs)Pipe Run 200Storm Sewer Conveyance SpreadsheetPete Moreau, Measure Groupstructure velocity (fps)depth of flow tributary area (sf) impervious (%) Pipe Run 100Pipe Run 300Santa Vera ApartmentsHeadwaters4/4/2025Page 1 of 1 04/04/2025