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HISTORYej_'O�� <br />Zach Trujillo <br />Environmental Protection Specialist <br />Division of Reclamation, Mining, and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: Colowyo Coal Mine (Permit No. C-1981-019), Technical Revision No. 141 (HC# 67752) <br />Dear Mr. Trujillo, <br />Thank you for your correspondence dated August 27, 2020 and received by our office on September 8, 2020 <br />regarding the review of the above referenced undertaking under Section 106 of the National Historic <br />Preservation Act (NHPA) and its implementing regulations 36 CFR Part 800. <br />After review of the documentation provided, we note that in accordance with the 1991 Memorandum of <br />Understanding (MOU) between our agencies, because the technical revision may incorporate additional lands <br />into the permit area or might otherwise alter previously approved permit conditions or mitigation measures, <br />concurrence between our agencies is required due to the potential for impacts to cultural and/or historic <br />resources. <br />The technical revision proposes removing previously undisturbed land from the permit and does not propose <br />additional surface disturbance outside of the area currently approved for disturbance. Based on the <br />documentation provided, we find that a finding of no historic properties affected [36 CFR 800.4(d)(1)] is <br />appropriate for the subject undertaking. <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 you have any questions, please contact Matthew Marques, <br />Section 106 Compliance Manager, at (303) 866-4678, or matthew.marques@state.co.us. <br />Sincerely, <br />Dr. HK Norton Digitally signed by Dr. Holly K Norton <br />Date: 2020.09.11 13:41:53 -06'00' <br />Steve Turner, AIA <br />State Historic Preservation Officer <br />Hi STORY COLORADO CENTER 1200 BROADWAY DENVER CO 80203 <br />