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<br />• OUTLET DESIr,NS <br />As shown in Attachment C, a 24-inch riser serves as the emergency <br />outlet and is designed to accomodate. the peak discharge from a 25 <br />year, 24 hour precipitation event. The structure is capable of <br />discharging flows well in excess of 5 cfs. <br />The principle outlet is through a gate valve located on the <br />spillway riser above the sediment storage volume as shown in <br />Attachment C. The structure is capable of discharging flows as <br />high as 4 cfs without overtopping the spillway riser. <br />REFERENCES ~. <br />Wischmeier, W.H., 1974, New Developments in Estimating Water <br />Erosion. Proceedings of the 29th Annual Meeting of the Soil <br />• Conservation Society of America. <br />Wischmeier, W.H., Johnson, C.B.,. Cross, B.U., 1971, A Soil <br />Erodibility Nomograph for Farmland and Construction Sites, <br />3ournal of Soil and Water Conservation, September-October. <br />• <br />D-8 <br />