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GENERAL30918
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Last modified
8/24/2016 7:48:20 PM
Creation date
11/23/2007 6:49:57 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981033
IBM Index Class Name
General Documents
Doc Date
11/14/2003
Doc Name
Proposed Decision & Findings of Compliance For RN4
Permit Index Doc Type
Findings
Media Type
D
Archive
No
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2. Groundwater Effects <br />Natural springs in, or adjacent to, the Bear No. 3 Mine permit area are not <br />expected to be affected by mining at the $ear Mine. A spring survey conducted at <br />the Bear Mine located three natural springs in the permit area. At the time that this <br />survey was conducted, no perennial springs existed on the property. A spring <br />survey conducted by MCC did locate several seasonal and perennial seeps in the <br />adjacent area. <br />Mining activities at the Bear No. 3 Mine could reduce spring flows or eliminate <br />springs by intercepting the groundwater or colluvial flows that supply the springs. <br />Groundwater may be intercepted by dewatering of the coal seam and adjacent roof <br />and floor rock. Groundwater in strata several hundred feet above the extracted <br />coal seam maybe intercepted by vertical fractures created by subsidence. <br />As previously discussed, beginning in June, 1995, personnel at the Bear Coal <br />Company discovered inflow to the 3rd West Section of the Beaz No. 3 Mine. This <br />inflow was measured at approximately 18 gpm. The source of the mine water <br />inflow has not been determined. Because the Bear No. 3 Mine has ceased <br />operations and has been sealed, no additional information is currently available on <br />inflow to the mine. Prior to June, 1995, the Bear No. 3 Mine reportedly never <br />intercepted any significant amounts of groundwater. As described below, small <br />amounts of water may have entered recently mined areas through the walls, roof, <br />and floor. Effects to groundwater resources (if any) resulting from the mine inflow <br />reported at the Bear No. 3 mine have not been determined. Groundwater <br />monitoring of the Lower Coal Member of the Mesaverde Formation in the vicinity <br />of the Bear No. 3 Mine may be deemed appropriate until the source of the mine <br />inflow is ever determined. To date, there has been no recorded discharge from the <br />Beaz No. 3 Mine. <br />On November 17, 1997, Beaz Coal Company personnel noted water flowing from <br />an area located immediately west of the sealed Edwards Mine Portal. This spring <br />is continuing to flow at approximately 37 gpm. Prior to this time, the abandoned <br />Edwards Mine had not discharged mine water since its opening in 1934. It has not <br />been determined if this recent discharge is in anyway associated with the mine <br />inflows reported at the Bear No. 3 Mine, The effect that this dischazge may have <br />on groundwater resources cannot be determined until the source of the water has <br />been identified. <br />Bear Coal Company is not expected to disturb the aquifers that supply springs <br />adjacent to the permit azea. The springs adjacent to the permit area are primarily <br />associated with sandstones in the Barren Member of the Mesaverde Formation. <br />These sandstones will not be affected by subsidence fractures. Rubblization above <br />the Bear No. 3 Mine workings is expected to extend several hundred feet above the <br />extracted B- and C-Seams. No fractures are expected to extend above the <br />sandstone at the top of the lower Coal Bearing Member. The limited vertical <br />20 <br />
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