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[C-21 I <br /> HISTORY <br /> COLORADO <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. 148 (HC# 67752) <br /> Dear Mr. Trujillo, <br /> Thank you for your correspondence dated and received by our office on May 13,2021 regarding the review of <br /> the above referenced undertaking under Section 106 of the National Historic Preservation Act(NHPA)and its <br /> implementing regulations 36 CFR Part 800. <br /> In accordance with the 1991 Memorandum of Understanding(MOU)between our agencies,because the <br /> technical revision may incorporate additional lands into the permit area or might otherwise alter previously <br /> approved permit conditions or mitigation measures,concurrence between our agencies is required due to the <br /> potential for impacts to cultural and/or historic resources. <br /> The provided documentation and information provided through email on May 17 and 18,2021 notes that the <br /> technical revision would not result in new ground disturbance. The revision will result in the use of two <br /> existing ground wells for a ground water monitoring program. Based on the information provided,we find <br /> that a finding of no historic properties affected [36 CFR 800.4(d)(1)]is 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 NHPA. <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. Holly Kathryn r n Norton Digitally signed by Dr. Holly Kathryn Norton <br /> Y Date: 2021.05.19 12:08:56 -06'00' <br /> Steve Turner,AIA <br /> State Historic Preservation Officer <br /> We are now accepting electronic consultation through our secure file transfer system,MoveIT.Directions for digital submission and <br /> registration for MoveIT are available at https://www.Iiistoacolorado.org/subn itting-your-data-preservation-programs. <br />