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- <J ..~ <br />Q Grand Mesa <br />Coal Company <br />February 18, 1981 <br />First and Columbia <br />P. O. Box 226 <br />Delta, Colo. 81416 <br />Office: (303) 674-7561 <br />Mine: (303)856-6402 <br />Dan Matthews <br />Reclamation Specialist <br />Mined Land Reclamation <br />423 Centennial Building <br />1313 Sherman Street <br />Denver, CO 80203 <br />RE: Permit X177-232 <br />Dear Dan: <br />RECEIVED <br />MAR ~ 2'~~1 <br />MINEC ~A.ND RECLAMATION'-COAL' <br />COLO. DEP1. OF NATURAL RESOURCES <br />Enclosed is up-date material for our present Mining and Reclamation Plan. <br />The following material is covered: Final layout of drainage system, piezometer <br />well description and initial results, technical revision request for a loader <br />garage, rock dust bin and a question concerning water quality. <br />The final layout of the drainage system and piezometer well description <br />are included as pages to add to Exhibit G of the plan dealing with Hydrology. <br />Most of the material included in these additions has been mentioned verbally <br />to yo¢or other members of the staff on inspections at the mine. <br />A technical revision is being requested to allow the addition of a loader <br />garage and a rock dust bin to the surface support facilities of the mine. Both <br />are located within the present permit boundaries. Due to the relatively small <br />reclamation cost above what has already been bonded for these areas, and due <br />to bonding in the new permit covering these buildings; Grand Mesa Coal Company <br />requests that these revisions be approved without additional bonding under <br />the present permit. The write up on these structures is included as pages <br />to add to Exhibit D of our present permit. <br />According to our N.P.D.E.S. Permit, we are allowed to pump water out of <br />the mine into the sediment pond. This water is picking up very small particles <br />of clay which are nearly impossible to settle out. Water that had set in the <br />pond for several weeks (below the maximum sediment volume level) when recently <br />tested had 1568 mg/L suspended solids. We have been checking with chemical <br />companies about polymer flocculants to settle the suspended solids. The local <br />Water Quality Control Division District Engineer, Dick Bowman, couldn't see <br />much problem with a polymer flocculant as long as adequate settling was allowed. <br />He indicated that I should notify the office in Denver of our intent to try <br />a flocculant. A letter was written to the permit section of the Water Quality <br />Control Division this week. Does Mined Land Reclamation have any imput on <br />this question? A sample sent to Dowell required 12 ppm. of M-178 polymer floccu- <br />lant to settle the suspended solids down to an exceptable level. <br /> <br />-J_ ~. V 9 <br />,- .1. ~ <br />