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3.7 CDPS Discharge Sites r~ I Under State of Colorado Department of Public Health and Environment (CDPHE), Colorado Discharge Permit System (CDPS) pemrit No.'s CO-0027154, CO-0036684, and CO-0042161, eleven discharge points are monitored throughout the year. Note that CDPS has been refereed to as the National Pollutant Discharge Elimination System (NPDES) in previous AHRs. Monitoring results are copied to DMG in accordance with CDPS requirements. Tables 67 through 72 provide 2003 and historical data summaries for those CDPS outfall points, other than mine dewatering site 115, which discharged during the year. The reader is referred to the CDPHE Colorado Discharge Monitoring Reports (DMRs) submitted monthly/quarterly during the year for additional information regarding specific discharge occurrences. Figures 116 through 119 provide graphical representations of the 2003 flow rate and field conductivity data for Pond D at the Foidel Creek Mine and for Pond E at the Fish Creek Tipple. Figure 120 depicts period of record total recoverable iron data for Pond E. Note that ponds A (former Outfall OOlA), and H (former Outfall 009A) were deactivated following Phase III Bond release of the Eckman Park area, and were subsequently removed from the newly amended CDPS permit on January 1, 2003. 3.8 2003 Inflow Survey The annual inflow survey was performed during late September 2003 (prior to freezing conditions). Water e]evations were monitored from the Fish Creek Borehole during the period of October 2002 to September 2003. During the inflow study, flow rates and field parameters are recorded for measurable inflows from the accessible areas of the underground mine. Results of the 2003 survey are presented on Figure 121, 2003 Inflow Study Mined Area. Longwall mining was completed in the EMD by early-January 2001. Production from the NMD, 12 Rt Longwall Panel, was underway by late January 2001. The EMD was pemvanently sealed in October 2001 removing all access to the b Rt and 7 Rt gate roads. About 9800 fee[ of the 15 Rt gate road were developed by early October 2002, with a small portion of the Northwest Mains extending past the neck of the 15Rt gate road. At the time of the 2003 inflow study, the mine operation was at 100 +00 of the IS Rt panel. During 2003, inflows continued in the Northeast Submains, although there appears to be a decrease in ceiling dripping. The reported high flow value was approximately 13 to 15 gallons per minute, comparable with 15 to 20 gpm reported in 2002. The field conductivity for the Wadge water was measured at 2091 umhos/cm. Flows have historically been measured in cross-cut 26 of the 6 Right Gateroad, however, 6 Rt was sealed in 2000. Thus, no measurements are available for 2003. Historical data is available in previous AHRs. The last flows measured for 2000 showed seasonal variations, with an average annual flow of approximately 65 gpm (as presented on Table 77 of the 2000 AHR). Inflows from the raise bore area (see IF 38 and IF 37 on Figure 121) were on the order of 16 to 20 gpm, down from an estimated 30 gpm in 2003. Field conductivity measurements were 1725 umhos/cm. 15