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14300 Highway 12 <br />Weston, Colorado 81091 <br />(719)868-2761 <br />FAX (719) 868-2275 <br />January 11, 1994 <br />BASIN <br />RESOURCES, ~N~. <br />a subsidiary of ENTECH, Inc. <br />~ECE11; t=~ <br />Mr. Joseph Dudash SAN 1 g <br />Office of Mined Land Reclamation 199 . <br />1313 Sherman Street Dn~sronotMinerefs~,Gecfc. <br />Denver, Colorado 80203 <br />Re: Golden Eagle Mine Permit No. C-81-013 <br />Permit Renewal Number 2 <br />Dear Mr. Dudash: <br />The following are intended to answer your questions <br />regarding the Golden Eagle Subsidence monitoring plan <br />submitted January 3, 1994. Where appropriate these <br />responses have been included into the revised subsidence <br />monitoring and control plan included with this letter. <br />1. In addition to the subsidence monitoring points, control <br />points were located further from the zones of projected <br />subsidence. A maximum angle of draw can be calculated from <br />these points. Based on information from this first panel, <br />additional points will be established over the second panel <br />to better define the angle of draw. <br />2. A statement requiring Division approval has been added <br />to the referenced portion of the plan. <br />3. The sentence has been revised to read "at least one <br />month prior to the subsidence trough approaching within 100 <br />feet". <br />4. This sentence hae been revised to read "semi-annually" <br />5. The heading has been deleted. <br />6. Tension cracks have been observed parallel to the <br />longwall panel and face. Where observed these cracks have <br />been located over the longwall gate entries and within 100 <br />to 200 feet of the advancing face. The width of these <br />cracks ranged up to one inch in width, and closed as the <br />face continued to advance. <br />