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11/20/2015 State.co.us Executive Branch Mail -Re: Subsidence Effects to Archaeological Sites in the Twentymile Mine <br />about subsidence are less in the center of the mined area where subsidence is uniform in comparison to areas <br />around the periphery of the mined area where the "angle of draw" will affect the degree of slope. If you think <br />the report would help you to consider the effects of subsidence on sites at the Foidel Creek Mine, I could ask <br />MAC to e-mail you an electronic version of the final report. I do not have an electronic version. Let me know. <br />will call you about this next week, but since you included me and the Sage Creek Mine consultation in your <br />e-mail discussion with DRMS about the Foidel Creek Mine, I felt obliged to respond in writing. <br />Bye for now. <br />On Wed, Nov 18, 2015 at 1:01 PM, Tobias - HC, Mark <mark.tobias state. co.us> wrote: <br />Jared: <br />Thanks for forwarding Metcalfs analysis of potential effects associated with Twentymile's Wolf Creek Seam <br />project. Unfortunately, our office has not yet received a copy of the report titled "Peabody Sage Creek LLC: A <br />Class III Cultural Resource Inventory of the Sage Creek Subsidence Expansion Area, Routt County, Colorado <br />(2013, revised April 2015) from BLM Little Snake. And as this report appears somewhat central to Metcalf s <br />letter and as it may inform this consultation, I've copied Brian Naze, the Little Snake FO archaeologist, in my <br />response. I will also say that while Brian and I have informally discussed the possibility of baseline <br />subsidence studies as terms of mitigation for the Sage Creek Expansion which Metcalf recommends as <br />worthwhile, no formal consultation has yet occurred. Brian, what is the status of the Sage Creek <br />consultation? <br />Mark <br />Mark Tobias <br />Section 106 Compliance Manager <br />Office of Archaeology and Historic Preservation <br />History Colorado <br />120o Broadway <br />Denver, Colorado 80203 <br />(303) 866-4674 <br />mark. tobias state.co.us <br />On Thu, Nov 5, 2015 at 9:00 AM, Ebert - DNR, Jared <jared.ebert@state.co.us> wrote: <br />Mark, <br />On September 11, 2015 the Division received a letter from your office regarding the results of a cultural <br />resources inventory that was conducted for three revisions proposed for the Foidel Creek Mine's mining <br />permit (C-1982-056). The revisions included MR289, PR10 and PRI 1. Regarding MR289, it was found <br />that the project would result in no historic properties affected. For PRI 0 and PR11, your office requested <br />additional information regarding the nature and extent of potential subsidence effects on two sites <br />(5RT3324 and 5RT3325). The Division requested the permittee (Twentymile Coal, LLC.) to conduct an <br />analysis of subsidence impacts to these sites. They hired Metcalf Archaeological Consultants, Inc. to <br />conduct an analysis. On November 4th, 2015 the Division received a letter from Metcalf Archaeological <br />Consultants with the results of their analysis. Their letter is attached. The Division has reviewed the <br />analysis and concurs that mitigation measures are not likely necessary for the sites in question. <br />However, we request that your office review the analysis. Please feel free to contact me with questions. <br />Thank you, <br />hftps://mail.google.com/mail/u/0/?ui=2&ik=e29129fcb5&vi ew=pt&search= i nbox&th=15124fc007c891 b1 &si m 1=15124fc007c891 b1 2/4 <br />