REP32511 - Laserfiche WebLink

Home Browse Search

• CARBON JUNCTION MINE (C-92-080) ANNUAL HYDROLOGIC REPORT WATER YEAR 1997 The Oakridge Energy, Inc. Carbon Junction Mine (CDMG Permit No. C-92-080) is located approximately 2 ~fz miles southeast of Durango, Colorado. The mine is located on an area known as Ewing Mesa near the juncture of Highways 160 and 550. The mine site is located in the upper drainage basin of Carbon Junction Canyon. The upper drainage basin of Carbon Junction Canyon is an intermittent tributary of the Animas River. Much of the Carbon Junction Canyon drainage has a steep grade with a total drainage basin of 0.8 square miles. Hydrologic sampling and data collection has been conducted at the Carbon Junction Mine since 1982. The hydrologic sampling program is in place in order to protect water quality during the life of the mining permit. The mine site was originally permitted by the Division of Minerals and Geology (CDMG), formerly Mined Land Reclamation Division, in 1983 and recently re-permitted in 1993. To date coal mining activity has been initiated on the site on a minor scale. The extent of coal mining at the Carbon Junction Mine includes opening the north and south pits. Ancillary activity has included construction of a permanently reclaimed spoils area, sediment control • structures, topsoil stockpiles, and pads for equipment. No reclamation has occurred at the mine site. This report includes hydrologic data for the 1997 water year. Figures in this report show trends from water year 1995 to water year 1997. With this data trends in ground water and surface water may be analyzed. Charts were not made for chemical constituents that were analyzed consistently below the normal detection level. Hydrologic data were collected for the Carbon Junction Mine from 1982 to the present except for the second, third, and fourth quarters of 1988. This data and along-term analysis of ground water and surface water at the Carbon Junction Mine were presented in the 1995 hydrologic report. Additional information is presented in this report. Locations of monitored springs and wells are found on the well and spring map within the permit document. In addition to the hydrologic monitoring undertaken for springs and groundwater wells at the mine, monitoring of discharges from the sediment pond is undertaken. Sediment ponds are also inspected on a quarterly basis for compliance with CDMG regulations. Information on discharges and sediment pond inspections follows the hydrologic monitoring program information. -1-