Laserfiche WebLink
<br />' 2.2.1 Surface Water Data Surface water data has been collected from seven (7) stations in the <br />Deserado Mine area. Surface water monitoring has been discontinued as per DMG's approval in <br />' August 1997 (TR47). The locations of these stations are shown on Plate 1 in the pocket of this <br />report. With the exception of the White River, stream flow in the Deserado Mine area is ephemeral <br />with flows occurring only in response to rapid snow melt or during heavy thunderstorms. Gaging <br />stream flow and collecting water samples is therefore dependent upon being able to collect samples <br />and gauge flow while the flow event is occurring. Heavy thunderstorms can result in flash floods <br />' which destroy the sampling and gauging stations. Station SW24-1 has been destroyed twice, the <br />last time in the Spring of 1983. Up until July 1986, this station was a'grab sample' location where <br />samples were taken as soon as possible after significant thunderstorms and during snow melt run <br />' off. Anew single stage sampler was installed in July 1986. Other stations have been plagued with <br />problems such as the samplers silting in and the gauging apparatus silting in. These problems are <br />corrected as soon as possible but there is no guarantee that the next flow event will not also plug <br />the sampling and gauging apparatus. <br />' The data collected from the surface water monitoring program during the hydrology reporting year <br />is contained in Appendix B. The statistical summary of the data is also included in Appendix B. <br />These data are compared with the original baseline data to determine if changes have occurred. <br />' The baseline data is reported in the "Deserado Mine First Annual Hydrology Report°, 1985 as well <br />as in the permit itself. <br />' As during the previous reporting period, stream flows were rare, due to the low incidence of <br />thunderstorms which cause run off events. A rainfall event caused one flow in March that was <br />detected at SWi-1, SW24-1 and SW11-1. The TDS was 330 mg/I at SW1-1, 840 mgfl at SW11- <br />1, and 350 mg/I at SW24-1. <br />' 2.2.2 Ground Water MonltorlDp Data Groundwater monitoring data consists of water levels <br />measurements. Tabulation of the raw data is included in Appendix C Water level measurements <br />' of eleven (11) additional stations in Federal Lease C-8424 and C-8425 were initiated in this <br />monitoring period. Hydrographs for the 26 stations (monitor holes) from which water level data was <br />' collected are included in Appendix D. Table 2-2 is a statistical summary of the water level data. <br />2.2.2.1 Alluvial Water Level Data Water level data has been collected from the one remaining <br />' original alluvial aquifer monitoring hole (QAL-5) and the Refuse Disposal Area alluvial monitoring <br />hole (RM-1). Five other alluvial monitoring holes were inundated by Kenney Reservoir. Ahydro- <br />graph of the water level data for QAL-5 is contained in Appendix E. The statistical summary of the <br />' water level data for OAL-5 is also included in Table 2-2. No water has yet been detected in RM-1. <br />The locations of these monitoring holes are shown on Plate 1 in the pocket of this report. The t]al-5 <br />' hydrograph shows a significant increase in the alluvial water level of the White River since the <br />' 6 <br /> <br />