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Table 4.8-7 Embankment Designs ( continued). <br /> <br />~ Middle Middle Middle East West <br />~ Flume Flume Flume Horse Middle East Horse <br />Sedimentation Pond: #1 (2) #2 #3 (2) #1 (2) Flume #1 (2) Flume #1 (2) (3) <br /> <br />Elevation Upstream 8903.0 8885.0 8888.0 7227.0 8810.0 6882.0 7188.0 <br />Toe (ft) <br />Principal Spillway <br />Stage (ft) 11.7(1) 15.5(1) 14.0(1) 14.0(1) 10.0(1) 11.3 (1) 13.0(1) <br />Elevation (ft) 8914.7 8900.5 8882.0 7232.0 8820.0 8873.3 7187.0 <br />Diameter-d (in) <br />Emergency Spillway <br />Stage (ft) 11.7(1) 15.5(1) 14.0(1) 14.0(1) 10.0(1) 11.3(1) 13.0(1) <br />p <br />Elevation (ft) 8914.7 8900.5 8882.0 7232.0 8820.0 8873.3 7187.0 <br />S Width-b (ft) 5.9 10.0 9.0 0.5 0.5 0.5 <br />Maximum W.S. 8918.4 8904.1 8888.0 7234.2 8821.8 8875.0 7187.3 <br />Elevation (ft) <br />25-Yr, 24-Hr Event <br />'~ <br />Top of Embankment 8918.5 8908.3 8888.0 7238.0 8824.0 8878.4 7189.0 <br />~ <br />Elevation (ft) <br />Freeboard (ft) 2.1 2.2 2.0 1.8 2.2 1.4 1.7 <br />Note: Elevations are based on current topographic information obtained from aedal photographs. Actual elevations will vary according to actual fleltl <br />cohditions after topsoil removal but relative elevations should rerhain the same. <br />(1) Single open-channel design. <br />(2) As-built infomtation. <br />(3) West Horse is a mostly incised structure with a small (3 ft.) embankment <br />