Laserfiche WebLink
• winter time period prior to the date of sample collection, no flow occurred at sites 900 (Foidel Creek), or at site <br />62 (Fish Creek). hi addition, discharge from site 115 (Fish Creek borehole) had ended on January 14, 2002, and <br />was not reinitiated until March 29, 2002. Thus, TCC did not appeaz to be a contributor to the new maximum <br />concentrations observed in the Jones well during this period. The closest common water quality sampling date <br />from contributing surface sites occurred on Febnrary 28, 2002. The following concentrations were detected: <br />• 29 (Middle Creek above confluence with Trout Creek) was at 1200 umhos/cm, with a sulfate <br />concentration of 500 mg/1. <br />• Site 301 (Trout Creek above confluence with Middle Creek) was 770 umhos/cm, with a sulfate <br />concentration of 330 mg/1. <br />• Site 69 (Trout Creek below confluence with Middle Creek) was 860 umhos/cm, with a sulfate <br />concentration of 360 mg/l. <br />• Site 1003 (Fish Creek above confluence with Trout Creek) was 1000 umhos/cm, with a sulfate <br />concentration of 390 mg/l. <br />• Site 1005 (Trout Creek below confluence with Fish Creek) was 930 umhos/cm, with a sulfate <br />concentration of 370 mg/1. <br />This data suggests that upstream sources on Middle Creek, Fish Creek, and Trout Creek (other than from TCC <br />discharge, which was not occurring), contributed jointly to the new maximum concentrations detected at the <br />Jones Well on March 7, 2002. During 2002, no other unusual observations are noted with water quality <br />remaining comparable to alluvial wells upstream of the site. No unusual observations aze noted with respect to <br />the Trout Creek alluvium groundwater levels, other than they were slightly lower than that seen in recent years, <br />most likely due to drought conditions in 2002. <br />Monitoring was initiated at Middle Creek alluvial well AVM-1 during 1996. During 2002, no unusual <br />observations aze noted with respect to the Middle Creek alluvium groundwater levels. No unusual observations <br />are noted with water quality characteristics comparable to other alluvial wells in the area. <br />Recorded surface water flows for Foidel Creek, Fish Creek, and Trout Creek (Table 56) were generally low in <br />comparison to TCC's historic record. This is undoubtedly associated with drought conditions seen in 2002, with <br />Fish Creek (downstream of SW-13) also impacted by recent subsidence o£ the 13 Rt panel. Surface ponding on <br />Fish Creek (as a result of subsidence over the 13 RT panel), coupled with drought conditions, resulted in lower <br />than normal flows and the temporary cessation of flow downstream of surface site SW-13. These included <br />surface sites 1002, SW-14, SW-15, 27A, and 1003. In addition, surface site 900 (Foidel Creek above confluence <br />with Middle Creek, and subsequent to confluence with Trout Creek) ceased flowing at the end of June 2002. <br />Thus, TCC was not a contributor to some of the elevated sulfate concentrations seen on downstream Trout Creek <br />(e.g. surface site 1005) during this period. <br />TDS concentrations at site 1005 (Figure I11} on Trout Creek, downstream of all mining operations, peaked at <br />• 730 mg/1 in July. TDS concentrations at site 800 (Table 39) on Foidel Creek, upstream of the mine facilities, <br />peaked at 3600 mg/I in August. TDS concentrations at site 8 (Table 40) on Foidel Creek, downstream of the mine <br />17 <br />