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SEDIMENTATION POND F - As Built Specifications <br />• <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 - 71 <br />- Sediment volume - 1.03 Ac-Ft. <br />- Runoff volume - 1.21 Ac-Ft. <br />- Total volume - 2.24 Ac-Ft. <br />- Emergency spillway height above bottom of natural channel is less than <br />ten feet. <br />- Relative elevation top of dam - 101.3 <br />- Relative elevation top of decant - 99.5 <br />• - Relative elevation crest of spillway - 100.0 <br />- Depth of flow in spillway for 25-year, 24-hour event - 0.2 Ft. <br />- Relative elevation dewatering hole - 98.0 - <br />- Diameter of dewatering hole - 2 inches <br />- Detention time - 34.9 hours <br /> <br />