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Colowyo Coal Company <br />?5 5731 State Highway 13 <br />1 <br />0 Meeker, CO 81641 <br />pow* <br /> <br />0 March 31, 2009 <br />Mr. James R. Stark <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 />RECEIVED <br />APR 01 2009 <br />?.,,, illabon, <br />minozj?; and Safety <br />RE: Technical Revision No. 80, East Pit Final Reclamation Sequencing, Colowyo <br />Coal Mine, Permit No. C-1981-019. <br />Dear Mr. Stark, <br />Enclosed please find two copies of materials provided for Technical Revision No. 80. This <br />change to the permit updates Map 29 - Spoil Grading by laying out an updated final <br />backfilling and grading plan for the closure of the East Pit. Colowyo has restructured the <br />time frames related to each individual spoil grading boundary in order to minimize erosional <br />effects to down-drain reclamation areas from up-drain areas and to allow these down-drain <br />areas at least one year's growth of new vegetation for stabilization purposes. Colowyo will <br />address sediment features such as sediment ponds and ditches in its upcoming PMT <br />revision and will address watershed modeling within the remaining unreclaimed portions of <br />the East Pit as soon as Technical Revision 73 - Curve Numbers is approved by the <br />Division. <br />Included with the revision package is an application form, the public notice, an index sheet <br />and other pertinent material associated with this revision application for incorporation into <br />the permit. Two copies of Map 29 - Spoil Grading have been submitted separately to the <br />Division by Colowyo's registered and qualified Professional Engineer, Tom Peterson. <br />Please add these maps to this revision to form a complete submittal. <br />Should you have any questions or require additional information, please feel free to contact <br />me at (970) 824-1578. <br />Sincerely, <br />Ryan Pawlowski <br />Environmental Engineer <br />Encl. 2 copies <br />Cc: file CF 1.1.2.69