REP06139 - Laserfiche WebLink

Home Browse Search

W-5 Alluvial ground water well located adjacent to Stollsteimer Creek below all mining activities. The station was selected to assess potential effects of mining on the alluvial water quality and level. W-6 Deep ground water well located in the mouth of Deep Creek Canyon. The station was selected to monitor deep aquifer baseline in the Fruitland Formation during mining of the Barren Ridge and Revision Area No. 1. W-7 Domestic well located in the alluvium of Stollsteimer Creek approximately 3/4 mile above mining activities. The station was selected as a control to assess the effects of mining on well water quality. 1~'-9 Deep ground water well located in the Fruitland Formation below the sedimentation ponds controlling runoff from Revision Area No. 1. The station was selected to assess effects of mining activities on aquifer quality and level. W-10 Deep ground water welt located in the Fruitland Formation above the sedimentation ponds controlling the Revision Area No. 1. The objectives of this station are similar to those of W-9. W-16 Deep ground water well located in the reclaimed area of the east pit near Highway 151. The site was selected to assess the quality and level of water in the reclaimed aquifer. W-l7 Deep ground water well located in the mouth of Deep Creek Canyon. The station was selected to monitor water quality and level in the Fruitland and/or Pictured Cliffs Sandstone Formations as pit development takes place in the Revision Area No. 2. W-18 Deep ground water well located in the mouth of Deep Creek Canyon. The station was selected for objectives similar to those of W-17. On January 30, 1986, the CMLRD approved a Technical Revision to reduce the hydrologic monitoring program at the site. Stations associated with the Revision Area No. 2 in Deep Creek (DC-1, W-17 and W-18) are not required to be monitored by the current program. The water quality parameters of arsenic, cadmium, lead, mercury, molybdenum and selenium have also been eliminated from all stations except well W-16 located in the reclaimed area of the east pit. Water quality sampling of the Stollsteimer Creek alluvium was added to station A-1 and eliminated from station W-1. Frequency of sampling, depth-to-water measurements, and stream discharge measurements were not changed by [his revision. In June 1988, the CMLRD approved a technical revision to conduct this monitoring program on a quarterly basis and in May 1990, a technical revision was approved which eliminated all groundwater monitoring at the site. The following sections of this report describe the methods and results of this revised program conducted at the Chimney Rock Mine site during 1990. Also contained in this report is a comparison of the data collected over the 1985 through 1990 period and recommendations for future monitoring.