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to review each modeling effort. Colowyo would be pleased to review pond <br />hydrology/sedimentology models with the CDMG. <br />12. Please refer to the GENERAL COMMENTS section of the letter for a discussion of <br />the present and future operation of Colowyo's sediment control ponds. The CDMG <br />has copies of all of Colowyo's hydrological modeling and the CDMG is encouraged <br />to review each modeling effort. Colowyo would be pleased to review pond <br />hydrology/sedimentology models with the CDMG. <br />13. Please refer to the GENERAL COMMENTS section of the letter for a discussion of <br />the present and future operation of Colowyo's sediment control ponds. The CDMG <br />has copies of all of Colowyo's hydrological modeling and the CDMG is encouraged <br />to review each modeling effort. Colowyo would be pleased to review pond <br />hydrology/sedimentology models with the CDMG. <br />14. Please refer to the GENERAL COMMENTS section of the letter for a discussion of <br />the present and future operation of Colowyo's sediment control ponds. The CDMG <br />has copies of all of Colowyo's hydrological modeling and the CDMG is encouraged <br />to review each modeling effort. Colowyo would be pleased to review pond <br />hydrology/sedimentology models with the CDMG. <br />B. Summary of Rationale <br />Colowyo submitted comments to the WQCD regazding the Draft CDPES Permit No. <br />CO-0045161, and Rationale in a letter to the WQCD, dated September 30, 1997. The <br />inaccuracies presented by the WQCD in the new draft permit Rationale change the <br />manner in which Colowyo firmly believed it had been authorized to operate in the past. <br />The intent of Colowyo's comments regazding the Rationale were to cotrect statements <br />made by the WQCD which Colowyo believed were inaccurate. <br />Colowyo would like to reiterate the fact that all ten of Colowyo' s sedimentation <br />ponds aze currently designed, constructed and operated as containment ponds, <br />utilizing manual headgates for dischazging. Colowyo is currently remodeling all <br />ten sediment control ponds to change them from containment ponds to treatment <br />ponds. <br />Please refer to the GENERAL COMMENTS section of the letter for a discussion <br />of the present and future operation of Colowyo's sediment control ponds. The <br />CDMG has copies of all of Colowyo's hydrological modeling and the CDMG is <br />encouraged to review each modeling effort. Colowyo would be pleased to review <br />pond hydrology/sedimentology models with the CDMG. <br />to <br /> <br />