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III 1111111111111111 <br />999 <br />~• <br />5 ~~ ATTACHMENT 13-7 <br />CULVERT CALCULATIOflS <br />Seneca II-W Mine <br />Rcutt County, Colorado <br />by <br />`~~ <br />u <br />SENECA COAL COMPANY <br />Doc Date:12/11/2001 <br />/ / <br />JUL 311998 <br />s <br />Revised OR/03/9B <br />