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Eel I <br />HISTORYej_'O�� <br />Zach T. Trujillo <br />Environmental Protection Specialist <br />Division of Reclamation, Mining, and Safety <br />Department of Natural Resources <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Re: Colowyo Coal Mine (Permit No. C-1981-019), Technical Revision No. 138 (TR -138), TR -138 Gossard <br />and Rail Loop Ponds (HC#67752) <br />Dear Mr. Trujillo: <br />We received your correspondence dated May 18, 2020 on May 22, 2020 regarding the review of the above <br />referenced project under Section 106 of the National Historic Preservation Act (36 CFR Part 800). <br />After review of the documentation provided, we concur that the proposed revisions to remove the primary <br />discharge structures on the Gossard and Rail Loop Ponds will result in no historic properties affected [36 CFR <br />800.4(d)(1)] under Section 106. We understand that the revision will not incorporate additional surface <br />disturbance outside of the previously consulted upon area for which cultural resource surveys have been <br />conducted. <br />Should unidentified archaeological resources be discovered in the course of the project, work must be <br />interrupted until the resources have been evaluated in terms of the National Register eligibility criteria (36 <br />CFR 60.4) in consultation with our office pursuant to 36 CFR 800.13. Also, should the consulted -upon scope <br />of the work change, please contact our office for continued consultation under Section 106 of the National <br />Historic Preservation Act. <br />We request being involved in the consultation process with the local government, which as stipulated in 36 <br />CFR 800.3 is required to be notified of the undertaking, and with other consulting parties. Additional <br />information provided by the local government or consulting parties might cause our office to re-evaluate our <br />eligibility and potential effect findings. Please note that our compliance letter does not end the 30 -day review <br />period provided to other consulting parties. <br />Thank you for the opportunity to comment. If we may be of further assistance, please contact Holly McKee - <br />Huth, Cultural Resource Information/Section 106 Compliance, at (303) 866-4670 or holly.mckee(c�r�state.co.us. <br />Sincerely, <br />Steve Turner, AIA <br />State Historic Preservation Officer <br />Hi STORY COLORADO CENTER 1200 BROADWAY DENVER CO 80203 <br />