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.,
<br />STATE OF COLORADO
<br />DIVISION OF RECLAMATION, MINING AND SAFETY
<br />Department of Natural Resources
<br />1313 Sherman St., Room 215
<br />Denver, Colorado 80203
<br />Phone: (303) 866-3567
<br />FAX: (303) 832-8106
<br />December 14, 2006
<br />Brenda Hoisington
<br />Department of Natural Resources
<br />Division of Water Resources
<br />1313 Sherman Street, Room 818
<br />Denver, CO 80203
<br />Re: Yoast Mine (Permit No. C-1994-082)
<br />Technical Revision Application No. 30 (TR-30)
<br />Sediment Pond 010 Storage Capacity Revision
<br />Dear Ms. Hoisington:
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<br />of
<br />COLORADO
<br />DIVISION OF
<br />RECLAMATION
<br />MINING
<br />- &-
<br />SAFETY
<br />Bill Owens
<br />Governor
<br />Russell George
<br />Eaecutive Director
<br />Ronald W. fattany
<br />Division Director
<br />Natural Resource Trustee
<br />The Division of Reclamation, Mining and Safety hereby issues notice, in accordance with Title 34, Article 33, Section I l6,
<br />Paragraph 4, of the Colorado Revised Statutes, that on December 13, 2006, an application to revise coal mining operations at
<br />the Yoast Mine was considered complete for the purposes of filing. The revision was submitted by Seneca Coal Company. All
<br />review and comment periods as provided in the Act and the Regulations initiate from this date of filing.
<br />This technical revision provides a revised SEDCAD4 demonstration [o update the pond storage capacity for Sediment Pond
<br />010. The demonstration utilizes recent landscape conditions and an annual R value that is representative of existing conditions.
<br />A sensitivity analysis is used to determine the maximum allowable sediment storage elevation, while maintaining compliance
<br />with Rules 4.05.6 and 4.05.9.
<br />The surface coal mining operation is on land located approximately 7 miles Southwest of Hayden, Colorado. The permit area is
<br />further described as follows:
<br />T6N, R87 W, Portions of Sections 28, 29 and 32
<br />TSN, R87 W, All of Section 17; Portions of Sections 5, 8, 16, 18, 19, 2Q 29, 30
<br />Mt. Harris & Dunckley
<br />The above-mentioned tracts of land are shown on USGS 7.5 minute Quadrangle map of Dunckley and Mount Harris.
<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 Hayden Public Library,
<br />P.O. Box 1813, Hayden, CO 81639-1813, and at [he Division office. For additional information or to provide written
<br />comments, contact the Division of Reclamation, Mining and Safety, Room 215, 1313 Sherman Street, Denver, Colorado 80203,
<br />(303) 866-3567. In order for us to comply with regulatory time frames, we request that comments be submitted within fifteen
<br />(15) days of this letter. If no comments are received by then, we will proceed on the assumption that you have no concerns
<br />wish, or objections to, the applicant's proposal.
<br />Sincerely,
<br />Michael P. Boulay
<br />Environmental Protection Specialist
<br />MPB/Ahd
<br />Office of
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<br />Office of
<br />ARive and Inactive Mines
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