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.~ <br />• <br /> <br />t.o <br />Table 1.2-1 Summary of Surface Water <br />Monitoring Program at the West <br />Elk Miue <br />Srarion Flow water Quality' <br />Eatt Fork Minnesom <br />Creek Flume Contnuout' 3 times per year <br />Lower Dry Fork Minnesom <br />Creek Flume Continuous' 3 limes per year <br />Upper Dry Fork Minnesom <br />Creek Flume Continuous' 3 times per year <br />Lick Creek Flume Continuous' 3 times per year <br />USGS/MCC Mtmesom Creek <br />Gaging Station Continuous' 3 times per year <br />Sylvester Gulch Continuous' 3 times per year <br />USGS/MCC North Fork Gunnison <br />Upper Continuous' 3 times per year <br />Nonh Fork Gunnison <br />Lower 3 limes per year <br />Gribble Gulch <br />~ APPendix A <br />' AppendLx B <br />' Appendix C <br />' Appendix D <br />the eight stations where flow was measured, <br />six are MCC sites and two are United States <br />Geological Survey (USGS) gages. The <br />locations of these monitoring stations are <br />shown on Figure 1. Appendix B and <br />Appendix C have preliminary flow data <br />from the continuous recorders located at the <br />USGS sites, Minnesota Creek downstream <br />of the Dry Fork and the North Fork of the <br />Gunnison near Somerset. The North Fork <br />station is located approximately '/a-mile up- <br />stream of the mine site. Because the USGS <br />gauging stations are heated, they were unaf- <br />fected by freezing temperatures. <br />Average daily flow measurements (including <br />mean, maximum, and minimum flows) for <br />the six MCC gauges are summarized in <br />Appendix A. One of these six stilling wells <br />froze in October, three in November, and <br />one in December. Thawing began in March <br />but it was mid-April before all stilling wells <br />had thawed. Due to difficulties from <br />continual, early flow sedimentation and <br />debris loading in Sylvester Gulch, nearly <br />two months of data was not acquired. <br />R t .210/ 10 A/OS /0 S /93 (8:06am) <br />Moniroring Arntvirs <br />Seasonal (three times per year, scheduled <br />for start and peak spring runoff, and fall low <br />flow) water samples were planned to be <br />taken and analyzed for water quality at eight <br />of the nine surface water monitoring stations <br />(no water quality data was obtained at the <br />Beaver Reservoir station). Measured field <br />parameters included pH, conductivity, tem- <br />perature, dissolved oxygen, and turbidity. <br />Samples were sent to a laboratory and ana- <br />lyzed for pH, conductivity, total dissolved <br />solids, total suspended solids, total iron, and <br />total manganese. Sampling results aze <br />summarized in Appendix D (Table D-1). <br />MCC voluntarily obtained an expanded suite <br />of parameters for the seasonal samples at the <br />Upper and Lower North Fork of the <br />Gunnison River (Tables D-2 and D-3) <br />stations. Monthly average minimum and <br />maximum values for the baseline monitoring <br />period are compared with WY 1994 data for <br />the Sylvester Gulch and North Fork <br />Gunnison stations in Appendix E. <br />1.3 SPRING WATER <br />MONITORING <br />The WY 1994 monitoring program included <br />nine springs, two of which (G26B and CR- <br />12) were recently added. Additional springs <br />were monitored during the yeaz to acquire <br />baseline data. The monitoring program is <br />summarized in Table 1.3-1. The locations <br />of the springs are shown un Exhibits 1 and <br />4. All known springs in the permit area aze <br />shown on Map 34 in Volume 5 of the M <br />and R Plan. Seasonal (three times per year) <br />samples were scheduled at the seven springs <br />in the historic monitoring progtattt. Field <br />measurements of flow, pH, conductivity, <br />temperature, dissolved oxygen, and <br />turbidity, and the results of laboratory <br />analyses for pH, specific conductance total <br />dissolved solids, total suspended solids, <br />iron, and manganese are presented in <br />Appendix F. <br />4 <br />REVISED 10/02/% <br />