Laserfiche WebLink
Table 1 <br />SEDIMENTATION POND E DESIGN SPECIFICATIONS <br />- Sedimentation pond design to contain 10 -year, 24-hour event. <br />- Emergency spillway designed for 25 -year, 24-hour event. <br />- Antecedent moisture condition II. <br />- Weighted curve number is 81. <br />- Drainage area is 35.5 ac. <br />- Disturbed area is 22.8 ac. <br />- Runoff volume is 1.42 ac -ft. <br />- Sediment volume is 0.58 ac -ft. <br />- Operation discharge is .00092 ac -ft. (300 gallons per day) <br />- Spoil Spring flow is .0397 ac -ft. (.02 cfs) <br />- Total volume is 2.04 ac -ft. <br />- Emergency spillway height above bottom of natural channel is less than <br />10 ft. <br />- Relative elevation top of dam is 57.0 ft. <br />- Relative elevation crest of emergency spillway is 55.5 ft. <br />- Depth of flow and velocity of flow in emergency spillway for design <br />event is 0.5 ft. and 5.2 fps respectively. <br />- Relative elevation top of decant is 55.0 ft. <br />- Relative elevation dewatering hole is 51.8 ft. <br />- Diameter of dewatering hole is 2.0 in. <br />- Total detention time is 34 hrs. <br />- 8-7 - Revised 10/19/88 <br />