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• • iiiiiniiiiuiiiiii <br />STATE OF CC-LORAllU <br />MINED LAND RECLAMATION DIVISION <br />Department of Natural Resources <br />1313 Sherman SI., Room 215 <br />Denver, CO 80203 <br />303 866-3567 <br />FAX: 303 832 8106 <br />pF COO <br />~~. ~ <br />Ne' ~ ~ <br />,4~~y <br />{ X876 ~ <br />Roy Romer. <br />Governor <br />Fretl R. Banta, <br />DATE• April 26, 1990 Division Direcmr <br />T0: Dan Hernandez <br />FROM: John T. Doerfer <br />RE: Sediment Basin Design, Snyder Quarry CAP, File No. M-77-21t) <br />I reviewed the responses to Items 5, 6, 7 and 8 on the sediment ponri design <br />provided by Oberring, Wirth, and Associates on April 20, 1990. My I;omments <br />following review are provided below: <br />5. We asked for clarification on the reclamation plan for the ponri. As a <br />temporary structure, the pond would not remain after mining anri would be <br />regraded and seeded. <br />6. The discrepancy between runoff area and area contributing sediment for <br />the purposes of pond design was adequately addressed. <br />7. Our suggestion to include only a clean-out level marker rather than a <br />staff gage was accepted. <br />8. The operator was not averse to reporting volume of sediment removed when <br />clean out is performed, however, you mdy want to modify our response as <br />per Bruce's suggestion. <br />In summary, no adequacy concerns remain on these aspects of the ponri design <br />proposed as a part of the Corrective Action Plan. The previous comnitment to <br />provide as-built drawings of the pond within 60 days of completion ~~f <br />construction is all that remains to be satisfied. <br />J TD/yj b <br />cc: Bruce Humphries <br />6484E <br />