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<br /> <br />Table E49-15 <br />Impacts to Receiving Streams -Maximum Annual Average Discharge from Site 115 <br />Highest discharge from Site 115 without exceeding 250 mglL Sulfate in Trout Creek below Fish Creek <br />Mine discharges (max. loading) I Flow ~ Flow I TDS ;Conduct. ; Sulfate j Year <br />cfs 1 aom 1 ma/L [umhos/cm; ma/L <br />.'A <br />b <br />°® <br />C~! <br />t~ <br />T <br />ni <br />m <br />0 <br />b <br />4 <br />115 1.73; 775; 6100; 7300; 3300; 1999 <br />109 (see Case 1) 1.36; 612; 2300; 3100; 1200; _ 2014 <br />115 3.02 1355] 2900] 3900 1800; 2014 <br /> Mean Flow Dry Year Flow <br />Estimated Baseline (Exhibit 32) Flow TDS Conduct. Sulfate Flow TDS ; Conduct. ; Sulfate <br /> cfs ~ mg/L ~ umho s/cm ~ 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 26.0; 441; 588; 172 6.9t 456; 608; 181 <br />Trout Creek below Fish Creek 72.4; 404; 538; 163 23.4 425; 567; <br />, 176 <br /> <br />Predicted Values 1 <br />1999 <br />Trout Creek, above Fish Creek 47.2; 4251 567; 181 17.31 5261 702j 237 <br />Fish Creek above confl. W/ Trout Creek 27.7; 794; 1006; 367 8.6j 1593] 591 6 809 <br />Trout Creek below Fish Creek 74.91 <br />1 5621 7301 250 25.81 8801 11181 427 <br />2014 <br />Trout Creek, above Fish Creek 47.8; 63D; 882; 188 17.9; 602; 9161 467 <br />Fish Creek above confl. W/ Trout Creek 27.71 561; 9761 357 8.6; 841; 9621 621 <br />Trout Creek below Fish Creek 75.5; 604; 916; 250 26.4; 680; 931; 517 <br />Mine Discharge Data Flow 8 conductivity Trom 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, 1999 Predicted TDS = <br />[[1.73(Flow~)•6100(TDS)J+(26.0(FIOw2)'441(TDSZ)]]/27.7(Flowro~ = 794 <br />~~ <br />TR 99-32 Table E49-15 11/15/99 <br />