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III IIIIIIIIIIIIIIII 999 BASIN RESOURCES, ~N~. a subsidiary of ENTECH, Inc. Mr. Kent Gorham Colorado Division of Minerals 1313 Sherman, Room 215 Denver, CO 80203 .,- ~ • `14300 Highway 12 Weston, Colorado 81091 (719) 868-2761 Purchasing (719) 868-2768 Fax (719)868-2275 3'In,! ~ ~QS ~~~~~ ~~ v~1~ October 3, 1995 and Geology ~`~~~ RE: Golden Eagle Mine; Permit C-81-013 Subsidence Report, 1st Half 1995 Dear Mr. Gorham: ~~Ci~\ , X095 OCj Q ~ Jra\QOy M\~~z~~ This is in response to your letter dated August 23 concerning the Golden Eagle subsidence information. Each point will be addressed as per your original letter. 1) During the first half of 1995, the second panel was mined out during February. The third panel started up in early June and advanced approximately 600 feet. The third panel was started approximately 880' East of its original planned initiation point. Mining should continue in panel 3 throughout the remainder of the year. The 4th panel is not expected to start until mid-1996. It will also be shortened approximately 880' on the East end. There are six sets of subsidence monuments in place. The 3rd North Railroad Monuments were established adjacent to the railroad tracks on March, 1988 over the 3rd North mains. The Santistevan Canyon monuments were established over the west end of the 1st panel parallel and perpendicular to t-he panel. The Zamora Canyon monuments are set perpendicular to the 2nd, 3rd, and 4th panels. The East Panel monuments are set perpendicular to the 2nd, 3rd, and 4th panels on the East end. The 3rd North monuments are set parallel to the East end of the 2nd panel. A new set of points, identified as NW3 West End Monuments, parallel to the West end of the 3rd panel were established in June. During this period, only the 3rd North monuments were affected by subsidence. The point in the center of the panel showed a drop of 4.6'. The remaining sets of points did not show signs of subsidence. The subsidence effects on NW3 West End Monuments will be registered in the 3rd quarter survey. The attached report on the 3rd North Railroad Monuments gives a detailed explanation of the results of that survey information. It is this information that supports the TR40 request for discontinuation of monitoring.