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<br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br />1 <br /> <br /> <br />1 <br /> <br /> <br />1 <br /> <br /> <br />1 <br />William J. Carter March 12, 1998 <br />Re: Response to Susan Burgmaier's comments on the 1996 Annual Hydrologic Report <br />been previously mined out at some time prior to October 1, 1920, the original date on the Utah Fuel <br />Company map. <br />The dashed entry lines in the cross-hatched azea, with the dates 3-27 and 6-27, are the C-Seam <br />workings in this area. Also attached is a copy of a portion of the C-Seam mine map from the Utah <br />Fuel Company Somerset Mine, latest revision date of June 1934. This map also indicates a C- <br />Seam portal east of Sanbom Creek. While there are no elevations on the C-Seam Map, the Sanbom <br />Creek Mine portals are approximately 50 feet east of the portal shown on the map, and the Sanborn <br />Creek Mine intersected the C-Seam approximately 250 feet east at an elevation of approximately <br />6045. There is no physical evidence of [he C-Seam portal on the ground. <br />The Number 1 Entry in the Sanbom Creek Mine C-Seam passed within 100 feet of the old <br />workings of the Somerset Mine C-Seam. Short probe holes were drilled in the rib of the Number 1 <br />En[ry during mining to be certain the Sanbom Creek Mine workings did not break into the <br />Somerset Mine workings. Apparently none of the probe holes intersected the Somerset Mine <br />workings, however, the probe holes and the ribs in this area seep some water into the Sanbom <br />Creek Mine. The inflow into the Sanbom Creek Mine at [his location is insignificant, mainly <br />causing a wet floor condition with no measurable flow, however, it does indicate the Somerset <br />Mine C-Seam workings probably contain water in this area. <br />Following end of mining operations in the Somerset Mine, the Elk Creek Discharge pumps were <br />fumed off in January 1986, and the Bear Tank Discharge pumps were fumed off in March 1986. <br />Beginning with the 1986 Second Quarter Hydrologic Monitoring Report for the Somerset Mine, the <br />water level in monitoring wells B-6 and H-10 was monitored and reported to the Colorado Mined <br />Land Reclamation Division. Both wells were former utility boreholes into the Somerset Mine in <br />the Bear Creek and Hubbard Creek azeas, respectively. The Somerset Mine portals were sealed <br />during May and June 1986. <br />Graph 4 shows the water levels in monitoring wells B-6 and H-10. Also shown on the graph is the <br />B-Seam Subcrop Elevation at the North Fork of the Gunnison River at approximately 6020. <br />Shortly after the pumps were fumed off in the Somerset Mine, the water elevation in monitoring <br />well H-10 was at elevation 6020. The water elevation in monitoring well H-10 stabilized at <br />approximately elevation 6028 during 1987 and 1988. The water elevation in monitoring well H-10 <br />began to rise in 1989 and continued to rise until 1992, when it stabilized at approximately elevation <br />6068. However, monitoring well H-10 is approximately 23,000 feet west-northwest of the subcrop, <br />and monitoring well B-6 is between monitoring well H-10 and the subcrop. <br />Water in monitoring well B-6 was first indicated in October 1987. Water level increased until <br />1990, when there was a decrease in water level from elevation 6035 to elevation 6014. Water level <br />increased again until 1994 when there was a decrease in water level from elevation 6051 to <br />elevation 6038. During 1995, the water level again rose to elevation 6051 by 1996. The water <br />20 <br />1 <br />