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III IIIIIIlIIIIII III <br />Doc Date:17/11/2p01 <br /> <br />S ~~ ATTACFPIENT 13-4 <br />Sedimentation Structure <br />Pond 011 <br />•~ <br />Yoast Mine <br />Routt County Colorado <br />by <br />Seneca Coal Company <br /> <br />Revised 07/15/97 <br />_ ~ i <br />