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PERMFILE132469
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PERMFILE132469
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Last modified
8/24/2016 10:33:13 PM
Creation date
11/26/2007 12:12:24 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007A
IBM Index Class Name
Permit File
Doc Date
6/2/2006
Section_Exhibit Name
2.05.4 Reclamation Plan
Media Type
D
Archive
Yes
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Elk <br />• Monitoring Mining Impacts~ur(ace Water <br />Monitoring of surface water to assess potential impacts of B-Seam mining will continue. No <br />changes were made to the plan when mining was begun in the B-Seam, as the original B-Seam <br />mining azea is essentially the same as the original F-Seam 5-yeaz permit area. The existing <br />monitoring plan can be found in the Surface and Groundwater Monitoring Section. A technical <br />revision to reduce hydrology monitoring was submitted in April, 1987 and was subsequently <br />approved. Monitoring of surface water data for the water augmentation plan will continue, as will <br />other surface water monitoring. <br />B-Seam monitoring data, results, impacts, if any, and predictions for the following yeaz will be <br />incorporated into the Mountain Coal Company Annual Hydrology Reports. The reports will be on a <br />water year basis (September 30 to October 1) as aze previous reports. Monitoring data will be kept <br />on file at the mine site. <br />Monitoring Minim Impacts~prings <br />Coal mining has not historically affected the discharge rates of springs in the vicinity of the West <br />Elk Mine. Except for localized subsidence effects and mine openings that are near steep mountain <br />fronts or are within a few hundred feet of land surface, coal mining does not have the potential to <br />impact discharge rates for springs in the vicinity of West Elk Mine. Even though it is unlikely that <br />coal mining will affect spring discharge rates, it is important that flow rate measurements continue <br />on decreed springs in future mining azeas. Continued measurement is necessary because MCC may <br />at some time in the future have to verify that possible dischazge rate changes aze due to either <br />seasonal or short-term climatic factors. <br />There has been no historical evidence that coal mining has affected the water chemistry of springs. <br />Except for shallow groundwater systems, which may be impacted by the refuse pile, the potential <br />for coal mining to affect the chemical character of spring dischazges is extremely low. <br />The monitoring program will be completed as presented in the Surface and Groundwater <br />Monitoring section in 2.04.7. There aze no mapped springs in the projected mine plan azea or angle <br />of draw azea within 350 feet depth range of the mine workings. A depth of 350 feet is the predicted <br />limit of B-Seam mining effects which could cause impacts under worst case (no cave develops) <br />conditions. The distance used for F-Seam impacts was 50 times seam height or 210 feet which was <br />conservatively rounded up to 300 feet. This factor is based on a heuristic rule, general in the <br />international coal community (Dr. Hamid Maleki, U.S. Bureau of Mines, personal communication, <br />1994). No springs above these zones aze expected to be affected significantly. <br />Data, mining locations, interpretations, and predictions for the following yeaz for B-Seam mining <br />will be incorporated into the Mountain Coal Company Annual Hydrology Report. Spring <br />monitoring locations aze shown on Map 34. The decreed springs are shown on Map 37. <br />Monitoring Minim Impacts-Groundwater <br />Mining induced water level changes have been observed in some F, E, and B seam well <br />2.05-79 Revised Dec. 1997 MR208; Revised Jan. /999 TR88; Rev. Apri12006 PR10 <br />
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