Laserfiche WebLink
respectively. <br />NPDES DISCHARGE SITES <br />Numerous additional NPDES discharge points associated with the TCC operations are monitored throughout <br />the yeaz with monitoring results submitted to the Division on a periodic basis in accordance with permit <br />requirements. Tables 43 through 48a provide Water Yeaz and period of record data summaries for those <br />outfall points other than mine dewatering site 115 which discharged during the year. Five (5) effluent <br />limitation exceedances were reported during the 1994 Water Yeaz. Iron and manganese limitations were <br />exceeded in February at Pond D; the TSS limitation at Pond T was exceeded in May; the total recoverable <br />iron limitation at the Fish Creek Borehole was exceeded during the first quarter; and the applicable pH <br />limitation at the Fish Creek Borehole was exceeded during the third quarter. The reader is referred to the <br />Discharge Monitoring Reports (DMRs) submitted during the year for additional information regarding <br />specific discharge occurrences. Applicable permits include No.'s CO-0027154, CO-0036684, and CO- <br />0042161. Figures 86 through 89 provide graphical representations of Water Year flow rate and field <br />conductivity data for Pond D at the Foidel Creek Mine and for Pond E at the Fish Creek Tipple. Figure <br />90 depicts period of record total recoverable iron data for Pond E. <br />• MINE INFLOW MONITORING <br />The inflow to the underground mine is monitored in two ways. The flow rate and water quality of the <br />discharges from the mine (Sites 109 and 115) are monitored before entering Pond D or Fish Creek <br />respectively. In addition, an annual mine inflow study is performed. The 1994 Mine Inflow survey was <br />conducted during December 1994. During the inflow study, flow rates and field parameters are recorded <br />for measurable inflows into the accessible areas of the mine. Results of the 1994 study are presented as <br />Figure 92. Historical mean flow rate information for sites 109 and 115 is presented on Table 35. During <br />1994, the mean discharge rate decreased relative to recently recorded figures with the dewatering activities <br />of 1st Panel South completed. <br />SUMMARY <br />No significant unexpected hydrology impacts attributable to the actvities or developments at the Foidel <br />Creek Mine aze observed to have occurred during the 1994 Water Year. A continuing declining water level <br />trend is noted in Wadge Overburden well 91M006 and may be related to localized dewatering of the <br />formation associated with mining activity. No water quality degradation is specifically noted for the Wadge <br />Overburden formation as a result of evaluating data collected during 1994. Water levels in the monitored <br />Twentymile Sandstone wells remained comparable to previously collected data. However, a markedly lower <br />-11- <br />