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. Peak estimated stage elevation with the passage of [he 100-year storm is 7008.18. Th1s <br />leaves 1.32 feet of freeboard to the top of embankment. <br />Please refer to Addendums 13-4A-A, 13-4A-B, and 13-4A-C for capacities of both spillways <br />during passage of the 10, 25, and 100-year storm events. Table 13-4A-6 presents the <br />details for the principal and emergency spillway. <br />TABLE 13-4A-6 <br />Emergency Spillway Data Summary <br />Sediment Pond 011 As-Built <br />• <br /> <br />Principal Spillway: <br />Type Trickle Tube <br />Inlec Elevation 7004.90 <br />Length 90 feet <br />Diameter 12 inches lopening) <br />Slope i0 5 <br />10-Y'r, 24-Hr Feak Stage (estimate) 7005.67 <br />Emergency Spillway: <br />Type Trapezoidal Channel <br />Channel Protection Rock riprap 6 t4i raft <br /> 600X geotex[ile <br />Bottom Width 15 feet <br />Minimum Depth (w/freeboard) 2 feet <br />Length 30 feet (embankment) <br />Side Slopes 3:1 <br />Inlet Elevation 7007.00 <br />100-year, 24-hour Peak Stage )estimate) 70GP.16 <br />Summar, <br />The capacity of Sedimentation Pond 011 is attributed partially [o the embankment and <br />partially [o the pond excavaLien. During passaye of the 10-year, 24-hour storm [he <br />Spillway does not discharge sediment downstream nor is [here any flow through the <br />emergency spillway. In addition, [he spillway is designed to safely discharge [he 25 and <br />100-year, 2a-nour storm events. <br />13-4A-9 Revised 12/12/97 <br />