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III IIIIIIIIIIIIIIII ~ ~ «h~ <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 Ilq~~~ <br />Denver, Colorado 80203 I <br />Phone: (303) 866-3567 <br />FAX: (3031832-8106 <br />DEPARTMENT OF <br />NATURAL <br />August 23, 1995 ~$QUjZCE$ <br />Roy Romer <br />Governor <br />dames 5. Lochhead <br />Mr. Ralph Lopez E.ecuove Dvec~or <br />Basin Resources, Inc. ALCnae~9. LOng <br />14300 Highway 12 Divi lion ovector <br />Weston, CO. 81091 <br />RE: Subsidence Report, 1st Half 1995, Golden Eagle Mine, #C-81-013 <br />Dear Mr. Lopez: <br />The Division has completed review of the first half 1995 Subsidence <br />Report for the Golden Eagle Mine. Please respond to the following <br />issues within 30 days of receipt of this letter. <br />1. The report submitted consists of data organized in a tabulated <br />format by survey point. Some discussion needs to be included <br />which briefly reviews the mining conducted since the last <br />report, including the starting date for each new panel, and an <br />estimate of the mining progress anticipated over the next 6 <br />months. This discussion should also briefly discuss the <br />results of the subsidence data collected. <br />2. Map 17 does not accurately depict the subsidence monitoring <br />stations as listed in the data tables. Each subsidence <br />monument line should have discrete points identified by a <br />numbering system of choice which clearly links the data <br />reported with the map. Examples are points W-1 to W-18, the <br />35 point north-south line, the Zamora Canyon line,and the line <br />at the east end of NW ~`2. <br />3. The elevations of subsidence monitoring points as depicted on <br />Map 17 for the unlabeled points at the west end of NW #3 does <br />not relate to the elevations recorded for the data in the <br />table titled NW 3 West End Subsidence Points. Please explain <br />this discrepancy. <br />4. Please explain the meaning of columns, Elevation Difference, <br />Diff. between Monuments, and Difference. Also, it would be <br />helpful if all the data was tabulated in the same type of <br />column format. <br />5. Where are the East Panel Control Points on Map 17? <br />