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1/24/94 subsidence monitoring map to get these measurements. The mains on the south <br />side of the fast longwall panel were measured to be 370 feet from the windmill well. <br />According to the mine progress map, the western portion of the first longwall panel was <br />subsided in May of 1991. The Golden Eagle Mine monitors subsidence along two <br />profiles of subsidence monuments along the western portion of iongwall panel #1. <br />These data are used to determine the angle of draw. The monuments are surveyed <br />quarterly and the results are submitted to the Division. Monitoring that was conducted <br />along the two profiles in the panel #1 areas shows an angle of draw of 27 degrees. This <br />information was submitted as part of the operator's quarterly subsidence survey. The <br />subsidence monument closest to the well is 5-13. This monument is 570 feet to the <br />northeast of the well as measured on the subsidence monitoring plan map. This <br />monument is located directly above the south edge of the longwall panel and above the <br />chain pillars. This monument has been subsided 0.76 feet. Monument 5-12, <br />approximately in the middle of the panel, has subsided 4.9 feet. The monument that <br />showed the greatest subsidence is monument S-4 with 5.6 feet. Monuments 5-14 and S- <br />15 at the south end of the monitoring profile could not be located by the surveyors. The <br />two missing monuments would have been between the Tatum well and the longwall <br />panel and, if this data were available, would show the furthest extent of subsidence in <br />the area of the well. <br />Subsidence Mgle of Draw <br />Basin Resources is continuing their collection and analysis of subsidence information. <br />The latest analysis shows that angles of draw in the longwall mining area range from 11 <br />degrees to 27 degrees. This information was presented to the DMG in a meeting held <br />on March 27, 1995. Based on the maximum angle of draw of 27 degrees, the well is not <br />in an area subject to subsidence. Projection of the angle of draw from the southern edge <br />of the longwall panel up to the surface shows that subsidence effects would be expected <br />to extend 306 feet from the edge of the longwall panel, 228 feet short of the windmill <br />well. For subsidence from the longwall panel to reach the windmill well, the angle of <br />draw would have to be greater than 41 degrees. <br />Water Levels in Tatum Well <br />Prior to permitting underground mining in this area, the previous mine operator, <br />Wyoming Fuel Company, collected baseline hydrology data in the area. This data was <br />used to describe the probable hydrologic consequences of mining activities on the <br />hydrologic balance of the area. Wyoming Fuel Company's 1984 well survey describes the <br />windmill well as "not functioning." The permit does not indicate what measures, if any, <br />were taken by Wyoming Fuel Company to attempt to collect data sufficient to <br />characterize windmill well water quantity at that time. In 1991, Wyoming Fuel Company <br />was informed in writing of the Tatums concern about potential damage to the windmill <br />well. However, no water quantity characterization for the windmill well is ultimately <br />included in the permit. As such, efforts to characterize the windmill well water quantity <br />were inadequate. <br />4 <br />