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GENERAL45351
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Last modified
8/24/2016 8:14:26 PM
Creation date
11/23/2007 1:43:35 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981033
IBM Index Class Name
General Documents
Doc Date
4/10/1998
Doc Name
PROPOSED DECISION & FINDINGS OF COMPLIANCE FOR RN3
Permit Index Doc Type
FINDINGS
Media Type
D
Archive
No
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b. Depleting the quantity of groundwater present in the C coal seam and <br />adjacent strata; <br />c. Degrading the water quality in the alluvial aquifer below the Bear No. 3 <br />facilities area; <br />d. Degrading the water quality of the North Fork of the Gunnison River; and <br />e. Depleting the quantity of water available in the North Fork of the Gunnison <br />River. <br />The first three points are discussed in the groundwater section, and the remaining <br />points are discussed in the surface water section. <br />2. Groundwater Effects <br />Springs in, or adjacent to, the Bear permit area are not expected to be affected <br />by mining at the Bear Mine. A spring survey conducted at the Bear Mine <br />located three springs in the permit area. At the time that this survey was <br />conducted, no perennial springs existed on the property. A spring survey <br />conducted by MCC has located several seasonal and perennial seeps in the <br />adjacent area. <br />Mining activities at the Bear Mine could reduce spring flows or eliminate springs <br />by intercepting the groundwater or colluvial flows that supply the springs. <br />Groundwater may be intercepted by dewatering of the coal seam and adjacent <br />roof and floor rock. Groundwater in strata several hundred feet above the <br />extracted coal seam may be intercepted by vertical fractures created by <br />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 Bear No. 3 Mine. <br />This inflow was measured at approximately 1H gpm. Because the Bear No. 3 <br />Mine has ceased operations and has been sealed, no additional information is <br />currently available on inflow to the mine. The source of the inflow has not been <br />determined and is currently being investigated by the Division. Prior to June, <br />1995, the Bear Mine reportedly never intercepted any significant amounts of <br />groundwater. As described below, small amounts of water may have entered <br />recently mined areas through the walls, roof, and floor. Effects to groundwater <br />resources (if any) resulting from the mine inflow reported at the Bear No. 3 mine <br />have not been determined. Groundwater monitoring of the Lower Coal Member <br />of the Mesaverde Formation in the vicinity of the Bear No. 3 Mine may be <br />deemed appropriate pending the outcome of the Division's investigation <br />regarding the source of the mine inflow. To date, there has been no recorded <br />discharge from the Bear No. 3 Mine. <br />20 <br />
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