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Introduction <br />' In October 1980, Chimney Rock Coal began a hydrologic sampling program. The program <br />' involves sampling the various chemical and physical constituents at numerous surface and <br />groundwater stations. The mine site is located approximately 20 miles southwest of Pagosa <br />Springs, Colorado on Highway 151. The mine facilities are situated adjacent to Stollsteimer <br />' Creek which is a perennial stream draining the area. Stollsteimer Creek flows to the southwest <br />into the Piedra River which is a tributary of the San Juan and Colorado Rivers, respectively. <br />' The objectives of this program are designed to gather information on both surface and <br />groundwater regimes and to assess the impacts of mining and reclamation activities on the <br />existing hydrologic balance. To this end, samplings have been conducted to assess surface water <br />' flow and groundwater movement. Water chemistry has also been analyzed at both surface and <br />groundwater stations. <br />Mining activities were suspended at the site during 1985 and the mine was in temporary <br />cessation between 1985 to 1990. In 1990, Kaiser began final reclamation of the surface facilities <br />area and Revision 1 pit area. This activity was completed during 1991, at which time all <br />' facilities associated with mining (except sediment control structures) were removed and all <br />disturbed lands were reclaimed. <br />Sampling locations which have been utilized during the program are described below: <br />S-1 Surface water station located on Stollsteimer Creek 1/4 mile above the mine facilities. <br />The station was selected to assess baseline conditions of stream quality and Flow <br />above mining facilities. <br />S-2 Surface water station located on Stollsteimer Creek below the surface facilities and <br />mining activities conducted on the Barren Ridge Area and above the inlet of the <br />sedimentation ponds which control site runoff from the Revision Area No.l. The <br />station was selected to assess effects of surface operations on stream quality and flow. <br />S-3 Surface water station located on Stollsteimer Creek one mile below all mining <br />activities. The station was selected to assess the overall effects of mining on stream <br />quality and flow. <br />DC-1 Deep Creek surface water station located on Deep Creek at Highway 151. The <br />station was selected to assess overall effects of mining in Revision Area No. 2 located <br />in the Deep Creek drainage. <br />1 <br />