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• <br />• <br />~rn~ 8 <br />CARBON JUNCTION MINE (C-92-080) <br />ANNUAL HYDROLOGIC REPORT FOR 1995 <br />The Oakridge Energy, Inc. Cazbon Junction Mine (CDMG Permit No. C-92-080) is <br />located approximately 2 1/2 miles southeast of Durango, Colorado neaz the juncture of <br />Highways 160 and 550. The mine is located on an area known as Ewing Mesa. The <br />mine site is located in the upper drainage basin of Carbon Junction Canyon. This <br />canyon is an intermittent tributary of the Animas River. Carbon Junction Canyon's <br />total drainage basin is 0.8 square miles. Much of the drainage has a steep grade. <br />Hydrologic sampling and data collection has been conducted at the Carbon Junction <br />Mine since 1982 in order to ensure protection of water quality. The mine site was <br />originally permitted by MLRD (Mined Land Reclamation Division) in 1983 and most <br />recently re-permitted by CDMG (Colorado Division of Minerals and Geology) in 1993. <br />To date coal mining activity has been initiated on the site on a minor scale. The extent <br />of coal mining at the Carbon Junction Mine includes opening the north and south pits. <br />Ancillary activity has included construction of an excess overburden fill, sediment <br />control structures, topsoil stockpiles, and pads for equipment. No reclamation has <br />occurred at the mine site. <br />This report will present hydrologic data for the 1995 water year, and also report on <br />hydrologic data that have been wllected since 1982 for the Carbon Junction Mine. In <br />this way short-term and long-term trends for surface and ground water may be <br />analyzed. Hydrologic data were collected for the Carbon Junction Mine from 1982 to <br />the present except for the second, third, and fourth quarters of 1988. During the last <br />three quarters of 1988 the permittee (Pueblo Coal, Inc.) was in bankruptcy and unable <br />to pay for lab testing. <br />DESCRII'TION OF HYDROLOGIC PROGRAM <br />A minor revision to the original permit was approved by MLRD in 1984 for the surface <br />and ground water monitoring program. This revision consolidated the sampling and <br />testing of springs, wells, and surface water, and modified the sampling to a quarterly <br />basis. According to the revision, sampling was to occur on the months of January, <br />April, July, and October. Surface water at the flume was also to be sampled if a major <br />precipitation or runoff event occurred. Guidelines for sampling methodology, <br />parameters, and sample identification were provided for springs, wells, and the flume. <br />• <br />