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C~ <br />Table TR 90-06-2 <br />SEDIMENTATION POND "M3-N" - OUTLET WORK DESIGN <br />• <br />10 Year - 24 Hour Event Elevation (feet) <br />Outlet Culbert Invert Elevation (feet) <br />Maximum Outlet Head (h in feet) <br />Culvert End Area (a in sq feet) <br />Entrance Head Loss (Ke) <br />Bend Head Loss (Kb) <br />Friction Head Loss (Kc) <br />Culbert Length (L in feet) <br />Q = a(2gH)O.5 / (1+Ke+Kb+KcL)0.5 <br />r,2 <br />i.o <br />0 (cls) <br />0.8 <br />0.6 <br />0.4 <br />0.2 <br />0 <br />H (FEET) <br />• <br />10 Year - 24 Hour Event Storage Volume (acre feet) <br />(cu-ft) <br />Avg. Head = (1/2) 2.9 = 1.4~, Q = 0.19 cfs <br />296,644 cu feet/0.79 cfs/3,600 sec/hr = 76 hrs <br />Minimum Theoretical Detention Time (hours) <br />MR 90-06 <br />Exhibit 3 - 18 <br />6,669.6 <br />6,664.8 <br />4.8 <br />0.35 <br />1.00 <br />0.00 <br />0.1990 <br />140 <br />4.93 <br />214,750 <br />16 <br />11/16/90 <br />