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Hydrologic Monironng Acdvitier <br />Samples of mine discharges and mine inflows <br />were taken during 1988. Most samples were tested <br />Cor ph, electrical conductivity, total suspended <br />solids, total dissolved solids, and total iron. <br />Results o[ the analyses are shown in Table 4. The <br />quality of water sampled is good and poses no <br />problem (or discharge to a sediment pond or in <br />some cases, direct discharge to a stream or other <br />surface feature. Mine water from portal #2 is <br />discharged to sediment pond MB-1. in years when <br />water is discharged from the Sylvester Gulch fan <br />discharge point, it goes directly into Sylvester <br />Creek. <br />The mine water balance, based on some <br />actual and some estimated flows, is shown in <br />Table 5. The quantity of water discharged or <br />pumped from the mine was approldmately 17 acre <br />feet. Water unaccounted for is lost through <br />seepage and evaporation into the ventilating air. <br />Both of these losses can be substantial depending <br />on conditions. <br />TABLE 4 Quality of Mine Water at the Mt. Gunnison No. 1 Mine During the 1988 <br />Water Year <br />pH Conductivity TSS TDS Total Fe <br />Location Date (units) (µmhos/cm) (mg/I) (mg/1) (mg/1) <br />Portal #2t 10 Mar 88 8.3 2700 170 2120 4.38 <br />Portal #2t 26 Apr 68 8.0 2400 96.5 2030 0.550 <br />• Portal #2t 30 Sep 88 7.61 2450 79.4 1820 0.263 <br />03-SGR IOXC 09 Mar 88 7.7 542 9.54 412 0.000 <br />OS-SGR 100' Inlry <br />Test Adit 09 Mar 86 7.5 544 36.5 368 0.000 <br />1W25 Panel Drainage 31 Mar 88 6.9 2550 42.2 2270 0.725 <br />1 WZS Panel Drainage 20 Dec 88 6.8 -- c2 2544 0.19 <br />I Discharged to sediment pond MB-1 <br />• <br />7 <br />