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• Mining related dewatering impacts are noted for the Fish Creek sandstone wells 91 M001 and 91 M004. Both 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 the spring. 91 M004 has sustained its water <br />level train while 91 M001 experiences a decline in the fall. Two springs are monitored in the same vicinity. SW 1 <br />did not flow during this period, but SW2 did Flow. SW2 flows were documented in Flowing in November, <br />MarcFy May, and August. TCC will continue to monitor these locations in 1999. <br />No unusual observations are noted with respect to Foidel Creek alluvium groundwater levels. Though remaining <br />elevated, Well OOl-S-S conductivity values appear to be stabilizing. Elevated TDS concentrations previously <br />documented at Foidel Creek alluvium well 008-AV-2 have declined slightly as they also continue to stabilize. <br />TCC will continue to carefully monitor the direction of [his Vend. <br />No unusual observations are noted with respect [o Fish Creek alluvium groundwater levels. Water levels in well <br />006-AY-1 were noted to decline during 1997 following several years of steady increase. 1998 water levels were <br />very similar to the 1997 levels. Crverall, fluctuations at this well are insignificant. No other notable water level <br />observations are apparent based upon review of the 1998 data. Increased field conductivity values were again <br />noted for the 1998 Water Year. TCC will continue to monitor this trend. <br />Moniu~ring was initiated at Trout Creek alluvial well 008-AT-1 during 1994. During 1998, no unusual <br />• observations are noted with respect to the Trout Creek alluvium groundwater levels. No unusual observations are <br />noted with water quality remaining comparable to alluvial wells upstream of the site. Monitoring was initiated at <br />Middle Creek alluvial well AVM-l during 1996. During 1998, no unusual observations are noted with respect to <br />the Middle Creek alluvium groundwater levels. No unusual observations are noted with water quality <br />characteristics comparable to other alluvial wells in the area <br />Recorded surface water flows for Foidel Creek, Fish Creek, and Trout Creek were relatively high compared to <br />TCC's period of record. TDS concentrations at site 1005 downstream of all mining operations peaked at 590 <br />mg/I in August. TDS concentrations at site 800 upstream of the Foidel Creek Mine facilities were documented to <br />peak at 3040 mp~l in Augtut. At site 8, downstream of [he mine facilities, the maximum TDS concentration also <br />occurn;d in August at 3350 mg/I. No other notable water quality impacts are evident at any surface water sites <br />monitored during 1998 <br />Recorded 1998 spoil spring discharges remain negligible and, therefore, did no[ 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 occured in conformance with applicable NPDES permit limitations and therefore did not <br />constittrte significant impacts to receiving waters. Mine water discharge sites 109 and I IS produced little water <br />during the 1998 Water Year. No unusual occurrences of inflow were noted as a result of the Annual Mine Inflow <br />• study with total inflows occurring at lower than predicted rates. <br />_Iq_ <br />