Laserfiche WebLink
Colowyo Coal Company <br />O• 5731 State Highway 13 <br />Meeker, CO 81641 <br />O-q T:970-824-1573 <br />o June 13, 2011 <br />0 <br />Mrs. Janet Binns <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />a <br />n of <br />RE: Minor Revision - 108, Map 19 Edit to Change PMT contours near Reclamation Unit EP051, <br />Colowyo Coal Mine, Permit No. C-1981-019. <br />Dear Mrs. Binns: <br />Colowyo received the Division's comments regarding MR-108 on June 6, 2011. Colowyo has the <br />following responses to the Division's comments: <br />1. Please explain why areas were not regraded in accordance with the approved post <br />mining topography in effect in 2009 when the original work was completed in the <br />2009 field season. Many significant discrepancies exist that are not related to drainage <br />locations. <br />Response. Colowyo did not regrade the entire 2009 spoil grading block to PMTfor <br />the reason that it would have created much more disturbance than was necessary as <br />Colowyo did not mine as far as was anticipated in the East Pit. Colowyo clearly <br />explained this deviation due to not mining as far as anticipated to the Division during <br />the April 5, 2011 meeting, and this was the main point that Colowyo stated for not <br />regrading this area to PMT. <br />2. MR-108 proposes changes to the approved post mining topography in the lower <br />section of the Prospect drainage. Division notes (D. Hernandez) from the April 5, <br />2011 meeting at Colowyo discussing this matter read: <br />"Regarding another matter, the company informed us that the actual on-the ground <br />topography ofa portion ofits 2009 reclamation just southeast of the East Pits 2010 <br />reclamation polygon does not match the company's approved post-mining topography <br />map. According to the company, this mis-match was part of the reason for their most <br />recent NOV. The company said that the recently-approved revision to the company's <br />post-mining topography (TR-87) did not pick-up this discrepancy. " <br />Colowyo Coal Company • 5731 State Highway 13 • Meeker, CO 81641 <br />T+ 1 970 824 1529 • F+ 1 970 824 1598 • http://prospect.riotinto.org/irj/portal