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<br />Table E49-12 <br />Impacts to Receiving Streams -Case 1 <br />W <br />'~ <br />e <br />Cri <br />-n <br />m <br />m <br />0 <br />ca <br />N <br />°o <br />0 <br />Mine discharges (max. loading) Flow <br />cfs TDS ~ Conduct. ; <br />mglL ;umhos/cm; Sulfate <br />mg/L Year <br />109 max. Combined 0.761 3000; 4000; 1600; 1999 <br />_ <br />115 max Combined 8 Individual 0.67; 61001 7300; 3300; 1999 <br />_ <br />109 max. Individual 1.36: 23001 31001 12001 2014 <br />115 value to use w/109 max. 0.12; 2900; 3900; 1600; 2014 <br />A' <br /> Mean Flow Dry Year Flow <br />Estimated Baseline (Exhibit 32) Flow TDS ;Conduct. ; Sulfate Flow I TDS ; Conduct. ; Sulfate <br /> cfs ~ mg/L 1 umh os/cm1 mg/L cfs mg/L ~ umhos/cm ~ mg/L <br />Trout Creek, above Fish Creek 46.4; 383; 511; 158 16.5; 412; 549; 174 <br />Fish Creek above confl. W/ Trout 26.01 441; 5681 172 6.91 4561 6081 181 <br />Trout Creek below Fish Creek 72.4; 395; 527; 158 23.4; <br />; 420; 560; <br />; 172 <br />Predicted Values ; <br />Combined 109 + 115 Load Maximum <br />Trout Creek, above Fish Creek 47.21 4251 5671 181 17.31 5261 7021 237 <br />Fish Creek above confl. w/ Trout Creek 26.7j 583; 756; 250 7.5; 958; 1203; 458 <br />Trout Creek below Fish Creek 73.8; 482; 635; <br />1 <br />, 206 24.8 6571 <br />1 854; <br /> <br />1 304 <br />109 at Individual Load Maximum <br />, <br />Trout Creek, above Fish Creek 47.81 438; 5851 188 17.9; 5561 7441 252 <br />Fish Creek above confl. W/ Trout Creek 26.1; 453; 604; 180 7.5; 463E 618 194 <br />Trout Creek below Fish Creek 73.9 4431 591; 185 25.4 5281 707 235 <br />Mine Discharge Data Flow 8 conductivity from estimated future water balance. TDS calculated from conductivity: <br />TDS = 0.75 'cond. Except for conductivities greater than 5000 umhos/cm: TDS = 0.84 'cond. <br />Sulfate for 109 from 3/30/99 analysis of 6 Right inflow, lower values prorated from TDS value <br />Sulfate for 115 from 2/8/99 analysis, lower values prorated from TDS value <br />Baseline data taken from Exhibit 32 <br />Predicted values calculated using mass balance equation shown in text (2.05.6(3)(b)(iii) Probable Hydrologic Consequences, Surface <br />Water Systems, Impacts of Mine Water Discharge) <br />Example: Fish Creek above confl. W/Trout Creek, 109+115 maximum TDS = <br />[[0.67(Flow,)'6100(TDS,)]+(26.0(Flowz)•441(TDSZ)]]/26.7(FlowT„) = 583 <br />TR 9&J7 Table E49-12 11/15/99 <br />