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<br />• <br />Hydrologic Moniroring Acfivipes <br />graphs depicting spring flows from 1979 to the <br />present have been included as Appendix F. <br />Springs sampling records during 1988 were <br />generally complete with the exception of springs <br />G-la and G-22. Flow at these springs was either <br />nonexistent or insufficient for sampling during all <br />three sampling periods. Consequently, no water <br />quality data were acquired from either spring. <br />GROUND WATER <br />MONITORING <br />Nineteen wells were monitored during the <br />1988 water year. Under the 1987 reduction of <br />hydrology monitoring revision, monitoring of all <br />wells in the Minnesota Creek basin, except <br />SOM-2 and SOM-16, was discontinued until the <br />summer before mining impacts can be expected. <br />Also, sampling frequency changed from monthly <br />(water levels) and quarterly (water quality) to 3 <br />times per year. These changes are summarized on <br />Table 3. The locations of the monitored wells are <br />shown on Exhibit I. <br />Under the revised hydrology monitoring <br />program, seasonal measurements (three times per <br />year) of water level, pH, conductivity, tempera- <br />ture, total dissolved solids, total suspended solids, <br />total iron, and total manganese were taken at <br />each monitoring well. Measured water levels, field <br />parameters, and the results of laboratory analyses <br />conducted for each well sample are presented in <br />TABLE 2 Spring Monitoring Program for the Mt. Gunnison No. 1 Mine <br />Location <br />Discharge <br />Water Quality <br />Springs on the North Half of Dry Fork Drainage Basin <br />G - 8a Discontinued Discontinued <br />J - 4 Discontinued Discontinued <br />J - 6 Discontinued Diswntinued <br />J - 7 Discontinued Diswntinued <br />D - 2 Discontinued Discontinued <br />Springs Above the "F' Seam in the North Fork Drainage Basin <br />G - 12 3 times per year 3 times per year <br />G - 14 3 times per year 3 times per year <br />G - 16 3 times per year 3 times per year <br />G - 22 3 times per year 3 times per year <br />G - 24 3 times per year 3 times per year <br />G - 28a Discontinued Diswntinued <br />Springs in or Below the "F' Seam in the North Fork Drainage Basin <br />G - la 3 times per year 3 times per year <br />G - 20 3 times per year 3 times per year <br />G - 25 Discontinued Discontinued <br />G - 26a Discontinued Discontinued <br />G - 31 Discontinued Discontinued <br />• <br />4 <br />