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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 />•Initiall}• 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 Foide] 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 TipplelLoadout Appendix, Volume Vll, pages 2.05-77 through 2.05-90. The sediment control plan is <br />presented on Map 5, Fish Creek Tipple H}•drolog}•. The hydrologic monitoring plan is described on pages 2.05-82 <br />through 2.05-84 of the same volume. <br />jiil__.____A_plan__for_trea[ment,_where__required b~. these ,Rul_e,..and.,for surface an~round <br />++•ater drainage from the area to be affected b+' the DfODOSed activities, and proposed quantitative limits on pollutants <br />in discharges subject to State and Federal laws. 7 <br />J--- - --~-.__ -- <br />Except for the Site 115 discharge discussed below, ll surface water discharge with treatment sy_stems_use'sediment <br />ponds to provide treatment. All sediment ponds are designe 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 V1I1), 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 ~O <br />sumps and pump stations. Effluent from the underground mine will be pumped through a borehole at Site 109 and ~'~ <br />en piped to Pond D, or alternatively to Site 114. Effluent +vill meet the +aater quality requirements of NPDES <br />ermit 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 />approximatel}• 1100 feet deep and penetrate the mine +vorkings 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 ]999, 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 facilit}•, 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 qualih• requirements of NPDES Permit CO-0042161 before being released. <br />(iii) A determination of the Qrobable 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 ~dy rologic re[~ime and the quantity and quality of water in surface and ¢round water systems under all seasonal <br />conditions,, as determined by_baseline hydrologic_and_geologic data collected from _or statistically re ro esentative of <br />the site The probable hydrologic consequences will identif}• adverse impacts which nta}• occur to the hvdrologi5 <br />balance including impacts from acid or toxic-fomiing_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 ironypH~total manganese,_and.other_parameters_re~uired by_the Division. <br />PROBABLE HYDROLOGIC CONSEQUENCES <br />~luation of the probable hydrologic consequences of the proposed mining and related activities encompasses a <br />ber of specific areas: <br />WPPROVED r-~3 o s 2000 <br />TR 99-32 2.05-131 1/3/00 <br />