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~~ <br />' During October 1984, the Taylor Draw Reservoir facilities were completed and the reservoir began <br />filling with water. The area around the alluvial groundwater holes has become a shallow water mud <br />' flat area with the deposition of mud, silt and sand at high reservoir levels. As a result, alluvial <br />groundwater monitoring holes Oal-1, Qal-2, Qal-3, Oal-4 and Oal-6 have been destroyed and are <br />' no longer available for monitoring. Alluvial hole Qal-5 is still being monitored. <br />During May 1987, longwall panel 1 was mined past the location of 2-12U. The location was <br />' subsided and the monitoring hole could no longer provide usable data. Accordingly, Western Fuels <br />submitted an application for a Technical Aevision on 6/7/88 to eliminate groundwater monitoring at <br />' 2-12U. The Technical Revision was subsequently approved. <br />2.2 Summary and Analysts of Deserado Mlne Hydrology Data <br />Data collected during this water year (October 1, 1995 to September 30, 1996) have been <br />summarized and compared with the data from the baseline hydrology inventory. Surace water and <br />' ground water discussions are presented separately in the following sections. <br />' 2.2.1 Surface Water Data Surface water data has been collected from seven (7) stations in the <br />Deserado Mine area. 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 neM 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 'rf changes have occuned. <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 April that was <br />' S <br /> <br />