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<br /> <br />1313 Sherman St. Room 215 Denver, CO 80203 P (303) 866-3567 F (303) 832-8106 https://drms.colorado.gov <br />Jared Polis, Governor | Dan Gibbs, Executive Director | Michael A. Cunningham, Director <br />May 2, 2025 <br /> <br /> <br />Office of Archaeology & Historic Preservation <br />History Colorado Center <br />1200 Broadway <br />Denver, CO 80203 <br /> <br /> <br />Re: Seneca II-W Mine (Permit No. C-1982-057) <br /> Technical Revision No. 83 (TR-83) <br /> TR 83, Hydrology Monitoring Reduction <br /> <br /> <br />Dear Sir or Madam: <br /> <br />The Division of Reclamation, Mining and Safety hereby issues notice, in accordance with Title 34, <br />Article 33, Section 116, Paragraph 4, of the Colorado Revised Statutes, that on May 1, 2025 an <br />application to revise coal mining operations at the Seneca II-W Mine was considered complete for <br />the purposes of filing. The revision was submitted by Seneca Property LLC. All review and <br />comment periods as provided in the Act and the Regulations initiate from this date of filing. <br /> <br />Discontinue ground water monitoring to allow for well abandonment for final permit release. The <br />applicant is not proposing additional surface disturbance outside of the area currently approved for <br />disturbance. <br /> <br />The surface coal mining operation is on land located approximately 9 miles South of Hayden, <br />Colorado. The permit area is further described as follows: <br /> <br />T5N, R88W; All of Section 15; Portions of Sections 9, 10, 11, 14, 16, 21, 22, 23, 26, 27, 34, and 35 <br /> T6N, R88W; Portions of Sections 14, 23 and 24 <br /> T6N, R87W; Portions of Sections 17, 18, 19 <br /> <br />The above-mentioned tracts of land are shown on the following USGS 7.5 minute Quadrangle <br />map(s): Hayden Gulch. <br /> <br />Because the above-referenced technical revision application may incorporate additional lands into <br />the permit area or might otherwise alter previously approved permit conditions or mitigation <br />measures, we are requesting your agency's evaluation of the potential for impacts to cultural and <br />historic resources.