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• • • <br />Table 4.8-7 Embankment Designs. <br /> <br /> East <br /> Pyeatt Grouse Grouse Sage Sage Oak Oak <br />Sedimentation Pond: #2 #1 #2 #1 #2 #1(2) #2(2) <br /> <br />Elevation Upstream 6460.0 6520.0 6500.0 6523.0 6501.0 6655.0 6621.0 <br />Toe (ft) <br />Principal Spillway <br />Stage (ft) 8.0 8.5 4.5 8.0 7.0 13.3 9.8 <br />Elevation (ft) 6468.0 6528.5 6504.5 65311 6508.0 6668.3 6630.8 <br />Emergency Spillway <br />Stage (ft) 10.0 10.0 6.0 10.0 9.0 15.5 11.7 <br />Elevation (ft) 6470,0 6530.0 6506.0 6533.0 6510.0 6670.5 6632.7 <br />Width-b (ft) 17.0 15.0 15.0 19.0 19.0 13.3 14.1 <br />Maximum W.S. 5470.7 6530.3 6506.0 6532.2 6509.0 6670.8 6633.2 <br />Elevation (ft) <br />25-Yr, 24-Hr Event <br /> <br />Top of Embankment 6472.0 6532.0 6508.0 6535.0 6512.0 6672.0 6635.0 <br />Elevation (ft) <br />Freeboard (ft) 1.3 1.7 2.0 2.8 3.0 1.2 1.8 <br />Note: Elevations are based on current topographic information obtained from aerial photographs. Actual elevations will vary according to actual field <br />conditions after topsoil removal but relative elevations should remain the same. <br />m (1) Single open-channel design. <br />(2) As-built information. <br />y <br />!< O <br />74 <br />74 <br />O <br />UI <br />G <br />?l°