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GENERAL52054
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Last modified
8/24/2016 8:38:04 PM
Creation date
11/23/2007 7:24:27 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981033
IBM Index Class Name
General Documents
Doc Date
5/19/1989
Doc Name
MEMO RECOMMENDATION TO APPROVE THE BEAR 3 MINE MINING PLAN MODIFICATION BEAR COAL CO INC GUNNISON
From
WESTERN FIELD OPERATIONS
To
OSM RECLAMATION AND ENFORCEMENT
Permit Index Doc Type
GENERAL CORRESPONDENCE
Media Type
D
Archive
No
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this well would approximate the water quality of the <br />monitoring wells that surround it. <br />Water quality analysis for the Stevens Gulch well water <br />indicates good quality water, with none of the parameters <br />exceeding the recommended water standards. <br />The water quality for the Hubbard Creek well water is fair <br />to poor and contains total dissolved solids and sodium <br />levels which at times exceed secondary water quality <br />standards for drinking water. <br />Occurrences of ground water have been noted in the Mesa <br />Verde formation from information obtained from drilling, <br />experience in the mines, and from the presence of springs <br />and seeps in the region. This information also indicates <br />that the only potential regional bedrock aquifer in the <br />general area is the laterally continuous Rollins sandstone. <br />The laterally discontinuous lenticular sandstones within the <br />upper part of the Mesa Verde Formation support only <br />localized ground water flows. <br />Recharge to the Rollins sandstone occurs along outcrops, <br />along subcrops, beneath stream alluvium, and in the channels <br />of the North Fork and its tributaries,. However, due to the <br />steepness of the topography in the outcrop area (i.e., <br />sandstones are cliff formers) and the narrowness of the <br />stream valleys, the Rollins sandstone received little <br />recharge, except in the area under the North Fork of the <br />Gunnison River and its associated alluvial deposits. <br />Some recharge to the Rollins sandstone may come indirectly <br />from the percolation of snowmelt and precipitation downward <br />through faults and fractures. Drill holes which penetrated <br />the Rollins sandstone near the Orchard Valley Mine were <br />initially dry, but after allowing these holes to recover <br />some water accumulated, up to 300 gallons, in the casing. <br />However, this amount of water is insufficient to provide a <br />desirable well yield. This indicates that recharge along <br />outcrops and subcrops above the level of the North Fork is <br />insufficient to sustain ground water wells developed in the <br />Rollins Sandstone. The only domestic use of the water from <br />the Rollins sandstone is from wells along the North Fork <br />near the Hawk's Nest Mines. The water quality elsewhere is <br />considered too saline for domestic use. <br />Aquifer tests were performed by WECC on the Barren member of <br />the Mesa Verde Formation. The transmissivity obtained for <br />this member was calculated to be 2.46 g/d/ft. Also, WECC <br />performed an aquifer test on a fractured area in the "F" <br />seam which yielded a transmissivity of 16.68 g/d/ft. <br />Another F seam well completed in an unfractured area in the <br />8 <br />
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