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• Table 64 provides a summary of the 2001 Water Year data collected from site 109. Table 64a provides a period <br />of record statistical summary of collected data at the site. Table 646 presents mine discharge volumes through <br />site 109 for the 2001 Water Yeaz. Figure 125 provides a graphical representation of period of record field <br />conductivity for mine water discharged at site 109. <br />Dewatering of the Southwest Mini a District through site 115, suspended in February 1996, was resumed in <br />August of 1998. The 2001 Water Year data for mine water discharge site 115 is presented on Table 65. Table <br />65a provides the period of record statistical summary. Table 65c presents water pumping records at site 115 for <br />the 2001 Water Year. At site 109, a new maximum value was recorded for field pH. At site 115 a new maximum <br />was recorded for lab pH. <br />3.7 CDPS Discharge Sites <br />Under State of Colorndo Department of Public Health and Environment (CDPHE), Colorado Discharge Permit <br />System (CDPS) permit No.'s CO-0027154, CO-0036684, and CO-0042161, numerous discharge points at TCC <br />operations are monitored throughout the year. Note that CDPS was referred to as the National Pollutant <br />Discharge Elimination System (NPDES) in previous AHRs. Monitoring results are copied to DMG on a periodic <br />basis in accordance with CDPS requirements. Tables 66 through 71 provide 2001 and historical data summaries <br />for those CDPS outfall points, other than mine dewatering site 115, which discharged during the year. The reader <br />is referred to the CDPHE Colorado Discharge Monitoring Reports (DMRs) submitted monthly during the year <br />• for additional information regarding specific discharge occurrences. Figures 128 through 131 provide graphical <br />representations of the 2001 flow rate and field conductivity data for Pond D at the Foidel Creek Mine and for <br />Pond E at the Fish Creek Tipple. Figure 132 depicts period of record total recoverable iron data for Pond E. <br />3.8 2001 Inflow Survev <br />The annual inflow survey was performed during early October 2001 (prior to freezing conditions). Water <br />elevations were monitored from the Fish Creek Borehole during the period of October 2000 to September 2001. <br />During the inflow study, flow rates and field parameters are recorded for measurable inflows from the accessible <br />azeas of the underground mine. Results of the 2001 survey are presented on Figure 134, 2001 Inflow Study <br />Mined Area. Longwall mining was completed m the EMD by early-January 2001. Production from the NMD, 12 <br />Rt Longwall Panel, was underway by late January 2001. The EMD was permanently sealed in October 2001 <br />removing all access to the 6 Rt and 7 Rt gate roads. The 12 Rt Longwall was completed in early September 2001 <br />and the 13 Rt Longwall was underway by late September 2001. About 6,200 feet of the 14 Rt gate road was <br />developed by late October 2001 with a small portion of the Northwest Mains extending pass the neck off for the <br />14 Rt gate road. <br />During 2001, inflows continued in the Northeast Submains, although there appears to be a decrease in ceiling <br />dripping. The reported high flow value was approximately 15 - 20 gallons per minute, somewhat less than <br />• reported in 2000. The results are presented on Table 76 and also shown on Figure 134. The field conductivity <br />for the water was measured at 1538 umhos/em, which is consistent with the 2000 measurement. Flows have <br />13 <br />