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Emergency Spillway <br />Elev. 6874.0 <br />Minimum 3' <br />Drainage Blanket <br />3 <br />1~~ <br />cl. <br />Phreatic Line <br />3 <br />-~ 1 <br />i <br />2B' ~ <br />1:1 <br />~ 45' <br />6" Minimum Cover <br />4' <br />1:1 1:1 <br />` 6'T <br />Key Trench <br />Approved Filter <br />Fabric <br />"" Toe Drain Pipe <br />2. <br />Toe Drain <br />