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Home My WebLink About3720 N. Sillect Avenue -SUMP SIZE NAPD Sump 08-136 SUMP SIZE TOP OF WATER SURFACE (S.F) 6,065 MIDDLE (S.F.) 3,640 BOTTOM (S.F.) 1,729 WATER DEPTH (ft.) 5.75 SUMP VOLUME PROVIDED VOLUME(c.f.) 21,423 = [DEPTH*(TOP + 4(MID) + BOTTOM)]/6 VOLUME (ac.-ft.) 0.49 BOTTOM OF SUMP (ELEV.) 396.4 TOP OF WATER SURFACE (ELEV.) 402.15 LOWEST INLET 403.16 TOP OF SUMP (ELEV.) 405.35 Sump bottom lowered 1.8' Sump Volume Required V = 0.15 x c x A = 0.15(0.9)(3.54 acres) = 0.48 acre-feet Sump Volume Provided > Sump Volume Required 0.49 acre-feet > 0.48 acre-feet okay