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The factors considered in the design of the drainage control and treatment plan are discussed in Exhibit 8, Sediment <br />Control Plan and the various modifications presented in Exhibit 8. <br />Initially the mine plan called for coal produced from the underground mine to be hauled to the Fish Creek Tipple. <br />Drainage control and treatment for the tipple facilities are described in detail in the permit application C- 036 -81 for <br />the Fish Creek Tipple, dated March 1984. This permit has subsequently been incorporated into permit C -82 -056. <br />The coal is now loaded through the tipple near the Foidel Creek Mine portal. While TCC intends to continue this <br />practice, the Fish Creek Tipple can be reactivated if needed. The surface and ground water drainage control plan <br />and discussions of probable hydrologic consequences for the Fish Creek Tipple /Loadout operation are found in the <br />Fish Creek Tipple /Loadout Appendix, Volume VII, pages 2.05 -77 through 2.05 -90. The sediment control plan is <br />presented on Map 5, Fish Creek Tipple Hydrology. The hydrologic monitoring plan is described on pages 2.05 -82 <br />through 2.05 -84 of the same volume. <br />(ii) A plan for treatment, where required by these Rule, and for surface and ground <br />water drainage from the area to be affected b the proposed activities, and proposed quantitative limits on <br />pollutants in discharges subject to State and Federal laws. <br />Except for the Site 115 discharge discussed below, all surface water discharge with treatment systems use sediment <br />ponds to provide treatment. All sediment ponds are designed to meet the requirements of their respective permits. <br />Effluent limitations for discharges from sedimentation control and mine discharge structures are specified in TC's <br />CDPS/NPDES Permits: CO- 0027154, CO- 0036684, CO- 0042161, COG - 850051, COG - 850054, COR- 03F087, and <br />COR- 040126, Table 9- l(Summary of Effluent Limitations, Normal Conditions). The CDPS/NPDES Permits are <br />located in Exhibit 30 (Volume III), Exhibit 10 (Volume VIII), and Exhibit 44 (Volume IIIA), respectively. <br />In addition to surface runoff, Pond D will control water pumped from the underground workings through a system <br />of sumps and pump stations. Effluent from the underground mine will be pumped through a borehole at Site 109 <br />and then piped to Pond D, or alternatively to Site 114. Effluent will meet the water quality requirements of <br />CDPS/NPDES Permit CO- 0027154 before being released from Pond D. The water will then drain through a <br />culvert under Haulroad B that discharges into Foidel Creek. <br />Effluent from the underground mine can also be discharged from the Fish Creek boreholes. The boreholes are <br />approximately 1100 feet deep and penetrate the mine workings at the West End of the 6 Left entry. Each pump is <br />capable of pumping 200 to 600 gpm and can be pumped individually or together for a combined rate of 1200 gpm. <br />Presently, June 1999, the pump can discharge at a rate of approximately 370 gpm, for a combined total of 740 gpm. <br />The water discharges into the FCB treatment facility, where it can be treated with sodium hydroxide to reduce the <br />total recoverable iron concentration. The water then passes through the facility before discharging at Site 115. <br />Effluent will meet the water quality requirements of CDPS/NPDES Permit CO- 0042161 before being released. <br />(iii) A determination of the probable hydrologic consequences of the proposed surface coal <br />mining activities. or underground mining activities, on the proposed permit area and adjacent area, with respect to <br />hydrologic regime and the quantity and nd quality of water in surface and ground water systems under all seasonal <br />conditions, as determined by baseline hydrologic and geologic data collected from, or statistically representative of, <br />the site. The probable hydrologic consequences will identify adverse impacts which may occur to the hydrologic <br />balance including: impacts from acid or toxic - forming materials, whether the operation would interrupt, diminish, <br />or contaminate water sources; the effect the operation would have on concentrations of total dissolved and total <br />suspended solids, total iron. pH. total manganese, and other parameters required by the Division. <br />PROBABLE HYDROLOGIC CONSEQUENCES <br />Evaluation of the probable hydrologic consequences of the proposed mining and related activities encompasses a <br />number of specific areas: <br />RN 12 -06 2.05 -131 04/01/13 <br />