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