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~, Mining related dewatering impacts are noted for the Fish Creek sandstone wells 91 M001 and 91 M004. Bo[h sites <br />were undermined in 1995 and exhibited water level declines corresponding to mining activity. Both wells appear <br />to be stabilizing and exhibited notable water level recovery during spring 1996. 91M004 sustained its water level <br />gain while 91 M001 was observed showing another decline in the fall. Two springs in the same vicinity, SW 1 and <br />SW2, exhibited flow again during the year as well. SW] flows were documented in August with SW2 flowing in <br />December and May. TCC will continue to monitor these locations in 1997. <br />No unusual observations are noted with respect to Foidel Creek alluvium groundwater levels. Well 001-5-5 <br />conductivity values continue to increase although the overall increases noted in 1996 are small. Elevated TDS <br />concentrations previously documented at Foidel Creek alluvium well 008-AV-2 appeaz to be stabilizing <br />somewhat. TCC will continue to carefully monitor the direction of this trend. <br />No unusual observations are noted with respect to Fish Creek alluvium groundwater levels. Water levels in well <br />006-AY-1 were noted to decline again during 1996 following several years of steady increase. Overall <br />fluctuations at this well are insignificant. No other notable water level observations are apparent based upon <br />review of the 1996 data. No notable water quality impacts are evident. <br />Monitoring was initiated at Trout Creek alluvial well 008-AT-1 during 1994. During 1996, no unusual <br />observations are noted with respect to the Trout Creek alluvium goundwater levels. No unusual observations are <br />U - noted with water quality remaining comparable to alluvial wells upstream of the site. Monitoring was initiated at <br />Middle Creek alluvial well AVM-1 during 1996. No unusual observations are noted with respect to the Middle <br />Creek alluvium groundwater levels. No unusual observations are noted with water quality characteristics <br />comparable to other alluvial wells in the area. <br />Recorded surface water flows for Foidel Creek, Fish Creek, and Trout Creek were relatively higher than <br />compared to recent years data. An extremely wet spring was attributable to the significant snowpack <br />accumulating during the winter months. TDS concentrations at site 1005 downstream of all mining operations <br />~- <br />peaked a 460 mg/I in Septembe . TDS concentrations at site 800 upstream of the Foidel Creek Mine facilities <br />were documented to peak at 3300 mg/I in Lune. At ci g downstream of the mine facilities, the maximum TDS <br />concentration occurred in September at 3680 mgJl. No other notable water quality impacts are evident at any <br />_~~~_ <br />surface water sites monitored during 1996. <br />Recorded 1996 spoil spring discharges remain negligible and, therefore, did not constitute a significant portion of <br />discharge from the TCC mine area with the potential to impact off-site areas. Discharges from sedimentation <br />ponds predominately occurred in conformance with applicable NPDES permit limitations and therefore did not <br />constitute significant impacts to receiving waters. Mine water discharge sites 109 and 115 produced less water <br />than in years past. No unusual occurrences of inflow were noted as a result of the Annual Mine Inflow study with <br />total intlows occurring at lower than predicted rates. <br />16- <br />