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6/23/2015 <br />State.co.us Executive Branch Mail - Fwd: Subsidence Monitoring <br />STATE, OF Hernandez - DNR AI sha <al sha.hernandez state.co.us> <br />COLORADO , Y Y <br />Please scan this e-mail and the attachments into laserfiche for the Peabody Sage Creek Mine; C-2009-087; IBM <br />Index Class Name: Report; Permit Index Doc Type: Subsidence Report; Doc Name: 2Q and 3Q 2012 <br />Subsidence Monitoring Report. <br />Thanks, <br />Jared <br />---------- Forwarded message ---------- <br />From: Cowman, Scott <SCo an peabodyenergy.com> <br />Date: Tue, Jun 16, 2015 at 3:05 PM <br />Subject: Subsidence Monitoring <br />To: "Ebert - DNR, Jared Oared. ebertCstate.co. us)" <jared.ebert@state.co.us> <br />Cc: "Brady, Ed" <EBrady@peabodyenergy.com> <br />Jerod, <br />Please see attached documents related to subsidence monitoring. The attachments show inspections that were <br />completed in the 2nd and 3rd quarters of 2012 when mining was active. The "Hazardous Conditions" part of the <br />report would detail any issues related to subsidence. Weekly inspections continued even after the mine was <br />idled so the most recent (and final) inspection has also been provided. The mine portals are now sealed and no <br />access to the mine is permitted per MSHA regulations. Additionally a map is attached that shows the <br />completed entries (mined area as -built) at the time the mine was idled, the final production report, and <br />documentation from the DNR stating that production reports would no longer be required given the idled status of <br />the mine. <br />I believe that to fulfill subsidence monitoring requirements only a 2nd and 3rd quarter report is required since <br />those are the only two quarters the mine was active. Since monitoring was required on a weekly basis by MSHA <br />I can provide additional documentation if needed. All reports show that no hazardous conditions (ie. roof falls, <br />pillar degradation, faults, or excessive inflow) were observed. Some inflow is normal as the interface between <br />formations often contains some water. The mining did not reach a point where any streams or water bodies were <br />undermined. Further, mining methods were restricted to CM (continuous mining or room and pillar mining) so no <br />subsidence could take place as stated in the Subsidence Baseline Report. <br />Please let me know if you have any questions or need additional information. <br />- Scott Cowman <br />https://m ai I .googl e.com/m ai I/u/0/?ui= 2&i k=e29129fcb5&view= pt&search= i nbox&th=14e1 c90b409bb166&si m l=14e1 c90b409bb166 1/3 <br />