2015-11-20_REVISION - C1982056 ‎(2)‎

• Permit No: C1982056
• IBM Index Class Name: Revision
• Doc Date: 11/20/2015
• Doc Name: Response
• From: Mark Tabias
• To: Brian Naze
• Type & Sequence: PR11
• Email Name: JLE
• Email Name: DIH
• Media Type: D
• Archive: No

11/20/2015 State.co.us Executive Branch Mail -Re: Subsidence Effects to Archaeological Sites in the Twentymile Mine
STATE, OF Hernandez - DNR Alysha <alysha-hernandez@state-co-us>
COLORADO
'
Re: Subsidence Effects to Archaeological Sites in the Twentymile Mine
1 message
Tobias - HC, Mark <mark.tobias@state. co.us> Fri, Nov 20, 2015 at 6:00 AM
To: "Naze, Brian" <[e-mail]>
Cc: "Ebert - DNR, Jared" <[e-mail]>, Alysha Hernandez - DNR <[e-mail]>,
Jennifer Maiolo <[e-mail]>
Dear Brian:
If it isn't too much of an imposition, an electronic copy of Metcalf s report would be grand. Preliminary review of
this document will certainly facilitate our consultation for Sage Creek toward the end of December. I look forward
to discussing this project with you next week, and with the Thanksgiving in mind, early week (Monday or
Tuesday) would work better.
Take care and thank you for your assistance,
Mark
Mark Tobias
Section 1o6 Compliance Manager
Office of Archaeology and Historic Preservation
History Colorado
1200 Broadway
Denver, Colorado 80203
[phone]
mark. tobias@state. co. us
On Thu, Nov 19, 2015 at 4:35 PM, Naze, Brian <[e-mail]> wrote:
Hi Mark, et al.
Mark, I will do my best to respond to your e-mail regarding subsidence at the Foidel Creek Mine and the
proposed Sage Creek Mine (both of which are owned by Peabody). DRMS is the lead agency for consulting
with SHPO about the potential effect of subsidence on historic and prehistoric sites that may result from the
permit revisions, etc. involved in the proposal to mine the Wolf Creek seam at the Foidel Creek Mine. BLM -
LSFO will be the lead agency when consulting with SHPO in the future about the effects of subsidence at the
proposed Sage Creek Mine. Putting this mine into production in the years to come will require acquisition of
one or more federal coal leases that would be issued by BLM.
BLM's consultation with SHPO regarding the Sage Creek mine was "put on a back burner," but I hope to
facilitate completion of the consultation process by the end of December. Jennifer informs me that Peabody's
plans to develop the Sage Creek mine are currently on hold. Because of this, I turned my attention to more
pressing matters in recent weeks. As you mentioned, Metcalf Archaeological Consultants (MAC) is
recommending a case study that documents the condition of eligible prehistoric sites in open terrain before
and after subsidence in order to provide an evidence -based assessment of exactly what (besides a decrease
in elevation) are the effects of subsidence on sites, if any. Your e-mail is timely because if the necessity of a
case study is to be decided by the current LSFO management, it needs to happen sooner rather than later.
have discussed the proposed case study with Assistant Field Manager Tim Wilson, but he is leaving LSFO at
the end of the week to accept a position in Wyoming. I have yet to discuss the matter with Field Manager
Wendy Reynolds, but plan to do so in the near future. She will be retiring at the end of December.
Your e-mail implies that the MAC report for the Sage Creek Mine may have useful information to help SHPO
consider the effects of subsidence of sites at the Foidel Creek Mine. The report does have a discussion of
subsidence resulting from Iongwall mining and from information in the report, one might suggest that concerns
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