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1 <br />1 <br />1 <br />i <br />i <br />1 <br />i <br />1 <br />1 <br /> <br /> <br />SEDIMENTATION POND M - As Built Specifications <br />- Sedimentation pond designed for 10-year, 24-hour event. <br />- Emergency spillway designed for 25-year, 24-hour event. <br />- Antecedent moisture condition II <br />- Weighted curve number - 75 <br />- Sediment volume -1.39 Ac-Ft. <br />- Runoff volume - 4.20 Ac-Ft. <br />- Total volume - 5.59 Ac-Ft. <br />- Emergency spillway height above bottom of natural channel is less than <br />ten feet. <br />- Relative elevation top of dam - 98.6 <br />- Relative elevation top of decant - 96.4 <br />- Relative elevation crest of spillway - 97.0 <br />- Depth of flow in spillway for 25-year, 24-hour event - 0.6 Ft. <br />- Relative elevation dewatering hole - 90.6 <br />- Diameter of dewatering hole - 3 inches <br />- Detention time - 45.2 hours <br />