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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 and <br />discussions of probable hydrologic consequences for the Fish Creek Tipple/Loadout operation are found in the Fish <br />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 />_ plan__ for trea[ment, nd <br />water drainage from the area to be affected by the Dr000sed activities, and proposed quantitative limits on pollutants <br />in discharges subject to State and Federal laws. 7 <br />Except for the Site 115 discharge discussed below, ll surface water discharge with treat ment sy%e _us 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 one of <br />three NPDES Permits: CO- 0027154, CO- 0036684, or CO- 0042161, Table 9- ](Summary of Effluent Limitations, <br />Normal Conditions). The NPDES Permits are located in Exhibit 30 (Volume 111), Exhibit 10 (Volume VHI), and <br />Exhibit 44 (Volume 111A), respectively. <br />In addition to surface runoff, Pond D will control water pumped from the underground workings through a system of � <br />sumps and pump stations. Effluent from the underground mine will be pumped through a borehole at Site 109 and <br />14 en piped to Pond D, or alternatively to Site 114. Effluent will meet the water quality requirements of NPDES <br />1ermit CO- 0027154 before being released from Pond D. The water will then drain through a culvert under Haulroad <br />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 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 />h vd� rologic regime and the quantity and quality of water in surface and ground water systems under all seasonal <br />conditions a s determined by_basgline hydrologic_and_geologic data collected from _or statistica re ro esentative 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, or <br />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_repuired by_the Division. <br />PROBABLE HYDROLOGIC CONSEQUENCES <br />f luation of the probable hydrologic consequences of the proposed mining and related activities encompasses a <br />ber of specific areas: <br />APPROVED FED 0 8 2000 <br />TR 99 -32 2.05 -131 1/3/00 <br />