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<br />n <br />u <br />Natural ground surface~~ <br />/ ,~ ~ _~ <br />S / ~h - ~ <br />r <br />M <br />----------------Y- <br />i i <br />'~~---o' Min.----~; <br />CHANNEL ON FLAT SLOPE IN NATURAL SOIL <br />(SLOPE < 8~/1000~ ) <br />SECT ION "A" <br /> <br />~s. <br />J"3' Min. ~~ <br />i <br />i <br />-~- 1--------- -- - <br />/-'~2 Min. <br />y-- ----------- -- <br />Naturalgraund surface--- <br />~ g' <br />---6' Min.----r ~. <br />i <br />--Rock fill zone <br />CHANNEL ON STEEP SLOPE IN NATURAL SOIL <br />{SLOPE '_ 8'/1000') <br />SECT ION ~iB~i <br /> <br />COLOWYO STREETER GULCH COAL MINE <br />STREETER GULCH DITCH <br />