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2016-02-25_GENERAL DOCUMENTS - C1982056
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2016-02-25_GENERAL DOCUMENTS - C1982056
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Last modified
8/24/2016 6:19:30 PM
Creation date
2/26/2016 8:12:17 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
General Documents
Doc Date
2/25/2016
Doc Name
Proposed Decision and Findings (PR11)
From
DRMS
To
Twentymile Coal, LLC
Permit Index Doc Type
Findings
Email Name
JLE
DIH
Media Type
D
Archive
No
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assessment regarding the Lease -By -Modification for the COC -54608 coal lease that <br />TC is seeking. According to Mrs. Caveny, a section 7 consultation is not be necessary <br />for PR -11. <br />XIV. Protection of Underground Mining <br />No specific approvals are granted to the applicant under this section. <br />XV. Subsidence Control <br />The applicant has predicted that no material damage will result from subsidence, other <br />than the possibility of mining in the Western Mining District drying up two springs <br />that have adjudicated water rights, the Gertie No. 1 and Livestock No. 2 springs. <br />Numerous structures exist above previously approved mining areas. The applicant has <br />presented a subsidence control plan to repair or mitigate damage caused by subsidence <br />for each of the existing structures. Details regarding the subsidence control plan may <br />be found in the approved PAP. A brief summary of the subsidence control measures <br />for each structure follows. <br />County Road No. 33 <br />Mining conducted in the Eastern Mining District (EMD) and longwall panel 12 in the <br />Northern Mining District (NMD) undermined portions of Routt County Road No. 33. <br />TC conducted daily monitoring of the road when the longwall panels were <br />approaching and undermining the road. When surface observations found the asphalt <br />road surface had buckled or been damaged due to subsidence, TC temporarily repaired <br />the surface using gravel. Once subsidence monitoring indicated that subsidence had <br />ceased, permanent asphalt overlay or patch was applied to the damaged road section. <br />This method was successfully used during the mining of Longwall panels 9R, 8R, 7R, <br />6R and 5R in the Eastern Mining District, and Longwall panel 12R in the Northern <br />Mining District. Twentymile Coal re -paved segments of Routt County Road No. 33 in <br />the fall of 1999 that had experienced damage due to subsidence of Longwall Panels 5R <br />and 6R. Twentymile Coal scaled loose rock from the slope above Routt County Road <br />No. 33 prior to undermining Longwall panel 12R, and placed temporary concrete <br />barriers or chain link meshing along the north side of Routt County Road No. 33, to <br />ensure that rockfall would not reach the road. <br />PR -11 proposes to undermine Routt County Road 33. The road is located over the <br />southern gateroad for the 5RT longwall panel and the 4RT longwall panel. TC will <br />monitor the road for subsidence impacts. Warning signs will be installed for road <br />damage and rockfall; also, signs will warn drivers they are entering a subsidence zone. <br />TC will repair or fund the repair of damage to the road caused by subsidence. <br />Union Pacific Railroad <br />Previously, when monitoring indicated that the track was damaged or the grade had <br />changed, a slow speed restriction was instituted. Re -leveling and repair of the track <br />Foidel Creek Mine 36 February 25, 2016 <br />
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