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STATE OF COLORADO
<br />DIVISION OF RECLAMATION, MINING AND SAFETY
<br />Department of Natural Resources
<br />1313 Sherman St., Room 215
<br />Denver
<br />Colorado 80203 C O L O R A D O
<br />, D I V I S I O N O F
<br />Phone: (303) 866-3567 RECLAMATION
<br />FAX: (303) 832-8106 MINING
<br /> - &-
<br /> SAF ETY
<br />May 13, 2008
<br /> Bill Ritter, Jr.
<br />Dick Wolfe Governor
<br />Department of Natural Resources Harris D. Sherman
<br />Division of Water Resources Executive Director
<br />1313 Sherman Street, Room 818 Ronald W. Cattany
<br />Denver, CO 80203 Division Director
<br /> Natural Resource Trustee
<br />Re: Colowyo Coal Mine (Permit No. C-1981-019)
<br />Technical Revision Application No. 73 (TR-73)
<br />TR-73 Updates the Hydrologic Curve Numbers for Sediment Pond Design
<br />Dear Mr. Wolfe:
<br />The Division of Reclamation, Mining and Safety hereby issues notice, in accordance with Title 34, Article 33, Section 116,
<br />Paragraph 4, of the Colorado Revised Statutes, that on May 13, 2008, an application to revise coal mining operations at the
<br />Colowyo Coal Mine was considered complete for the purposes of filing. The revision was submitted by Colowyo Coal
<br />Company L.P.. All review and comment periods as provided in the Act and the Regulations initiate from this date of filing.
<br />The Colowyo Coal Company has submitted a Technical Revision for the Colowyo Mine to update and modify the curve
<br />numbers used in the SEDCAD hydrologic modeling for sediment ponds, ditches and other hydrologic structures. Currently,
<br />Colowyo has one approved curve number for each different type of surface at the mine site. This revision will change that
<br />single curve number to a more appropriate range of curve numbers, from which an appropriate curve number can be chosen.
<br />This revision will not change the design or modeling of any hydrologic structures already built. This revision is administrative
<br />in nature so there is no proposed change to the mine's disturbance boundary or permit boundary. There will not be any increase
<br />in the mine's reclamation liability as a result of this revision.
<br />The surface coal mining operation is on land located approximately 28 miles South of Craig, Colorado. The permit area is
<br />further described as follows:
<br />All or portions of Sections 2, 3, 4, 8, 9, 10, 11, 14, 15, 16, l7, 20, 21 and T3N, R93W; and Sections 13, 15, 22, 23, 24, 26, 27,
<br />28, 33 and 34, T4N, R93W; 6th Prime Meridian.
<br />The above-mentioned tracts of land are shown on USGS 7.5 minute Quadrangle map of Axial and Nine Mile Gap.
<br />The applicant is required to publish notice in a local newspaper that this application has been deemed complete. At the time of
<br />publication of this notice, the applicant is additionally required to place a copy of this application at the Moffat County Clerk
<br />and Recorder, 221 West Victory Way, Craig, CO 81625, and at the Division office. For additional information or to provide
<br />written comments, contact the Division of Reclamation; Mining and Safety, Room 215, 1313 Sherman Street, Denver,
<br />Colorado 80203, (303) 866-3567. In order for us to comply with regulatory time frames, we request that comments be
<br />submitted within fifteen (15) days of this letter. If no comments are received by then, we will proceed on the assumption that
<br />you have no concerns with, or objections to, the applicant's proposal.
<br />Sincerely,
<br />James R. Stark
<br />Environmental Protection Specialist
<br />M:\OSS\ahd\temp\C-TR-03_C 1981 O 19_J RS_05132008104040.doc
<br />Office of Office of
<br />Mined Land Reclamation Denver Grand )unction Durango Active and Inactive Mines
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