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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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regards to Permit Revision No. 2 was received from the U.S. Fish and Wildlife Service on <br />January 18, 1995. No comments were received on the Permit Renewal No. 4 application, <br />The Bear Coal operation is in compliance with the provisions of this section. <br />XIV. Protection of Underground Mining <br />This section is not applicable to the Bear Coal Company permit. <br />XV. Subsidence Control <br />A. A description of the subsidence monitoring plan for the Bear Mine is presented in <br />Section 2.05.6 of the Bear No. 3 permit application. <br />Bear Coal Company has conformed with the requirements of the permanent program <br />regulations regazding subsidence control at the Bear No. 3 Mine. No structures overlie <br />the underground workings of the Bear No. 3 Mine. Potentially affected renewable <br />resource lands are limited to the aquifers of the Barren Member of the Mesaverde and <br />the coal seams overlying the B-and C-Seams extracted in the Bear No. 3 Mine and the <br />springs located in Lone Pine Gulch. The limited area of the potentially affected <br />aquifers which occur within the permit area, and the limitation of potential effects to <br />the down-dip, near-outcrop parts of these aquifers and coal seams, reduced the possible <br />hydrologic effects of subsidence upon the aquifers and the coal seams. Beaz did not <br />mine within the angle of draw of the Lone Pine springs, and additionally used 50 <br />percent coal extraction in areas adjacent to these springs. The Division does not <br />consider the Bear No. 3 Mine a threat to either structures or renewable resource lands. <br />With the submittal of Permit Revision No. 2, the Division determined that Bear Coal <br />Company should submit a list ofthe various structures and renewable resources within <br />and adjacent to their permit area. Bear submitted the inventory and a subsidence <br />control plan (page 2.05-63d of the permit application) to restrict mining and associated <br />subsidence to azeas that are well away from structures or renewable resource lands <br />absent additional subsidence monitoring. Upon further review, the Division <br />determined that additional subsidence monitoring would be required in areas that were <br />previously not considered as renewable resources and not identified as such by the <br />operator. These areas were the Mountain Coal ventilation fan access road, an <br />ephemeral surface tributary to Lone Pine Gulch, and the area overlying panels 31-38. <br />This additional monitoring was addressed through submittal of a technical revision as <br />required by Stipulation No. 35. <br />The canyon walls of the North Fork of the Gunnison River are covered with numerous <br />landslide deposits. These mass movement features vary in age from ancient to modem. <br />Rotational slumps, translational, earthflow and debris-flow features aze present on the <br />site. A study conducted by Rocky Mountain Geotechnical of the Bear No. 3 property <br />has mapped numerous mass movement features. <br />28 <br />
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