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2014-06-19_PERMIT FILE - C1981019A
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2014-06-19_PERMIT FILE - C1981019A
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Last modified
8/24/2016 5:44:54 PM
Creation date
6/23/2014 10:51:07 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981019A
IBM Index Class Name
Permit File
Doc Date
6/19/2014
Doc Name
Geotechnical Stability Report For Highwall Mining At the Colowyo Coal Mine
Section_Exhibit Name
Exhibit 23, Item 1
Media Type
D
Archive
Yes
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July 23, 2013 <br />Page vi <br />when exposed. Leaving 4 inches of roof coal has helped mitigate this issue in the past, <br />and the same practice is recommended for the mining addressed herein. If soft floor <br />conditions are encountered, leaving a similar amount of floor coal could improve <br />trafficability, but this has generally not been an issue in the past. <br />Highwall mining will be approximately along the dip, with the exception of the end wall <br />panels projected in South Taylor, in which mining will be primarily along the strike. <br />Other than these end wall panels, mining will be downdip in South Taylor, and updip in <br />the West Pit. The range of dip indicated in the seam model has been successfully mined <br />on the property in the past, and is not expected to pose undue problems. Assuming seam <br />thickness greater than the minimum miner cutting height, seam undulation will likely be <br />the limiting factor that determines the miner penetration depth achieved. <br />Agapito Associates, Inc. <br />
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