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PERMFILE55100
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PERMFILE55100
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Entry Properties
Last modified
8/24/2016 10:58:02 PM
Creation date
11/20/2007 4:27:16 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1996083A
IBM Index Class Name
Permit File
Doc Date
9/25/2003
Doc Name
pages 2.05-59 through 2.05-116
Section_Exhibit Name
Rule 2.05 Operation and Reclamation Part 2
Media Type
D
Archive
Yes
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• 2.05.6(6) <br />(b) A description of the worst possible consequences which subsidence, if it <br />occurred, could have for such structures or renewable resource lands. <br /> <br />The premining land use of the permit area is classified as rangeland, wildlife <br />habitat and industrial. The majority of the area is rangeland and wildlife <br />habitat. The area classified as industrial is the previously disturbed area <br />associated with the old King Mine. The postmining land use of the permit <br />area will be classified the same as the premining land use which is <br />rangeland, wildlife habitat and industrial. See Map 12, Premining Land Use <br />and Map 13 Postmining Land Use. <br />A description of the subsidence related phenomena predicted to occur within <br />the permit and adjacent area is presented in Volume 111, Exhibit 15. <br /> <br />Terror Creek Reservoir should not be affected by subsidence since it lies <br />entirely outside the limits of mining and is more than 2000 feet above the <br />coal seam to be mined. However, the Reservoir's embankment could be <br />damaged bymining-induced subsidence and seismicity. Such damage could <br />cause leakage from the reservoir or a failure of the dam which could cause <br />loss of life and direct or indirect property damage. Ponds could be damaged <br />and drained by a subsidence crack that would occur directly below the pond. <br />The probability of such an event is very low. Any pond affected by a <br />subsidence crack could be repaired through the installation of a pond lining <br />of an impervious material such as bentonite or synthetic liner material. <br />Springs could be damaged by subsidence cracks in the impervious layer <br />below the springs which would cause them to drain to the formation below. <br />It may be possible to repair a spring that is affected by a subsidence crack. <br />First the flow interrupting crack would have to be located. Then an <br />impervious liner would be installed to seal the crack. Then the spring would <br />be developed with the use of perforated pipe and pervious gravel. <br />PR-04 2.05 - 103 - 02!01 <br />
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