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page 1 <br />i.~ ~ <br />I. FnR~dARD <br />The permit for the Edna Mine was approved *iovember 16, 1981 after a <br />lengthy and thorough review. As part of the approval, the mine is required <br />to annually submit a report summarizing each ,year's hydrology and wildlife <br />monitoring results. During the mid-term review of the permit in 1984, <br />several suggestions were made by the 14LRD regarding hydrology on the <br />contents of the previous years reports that •,rou13 improve the report's <br />usefulness. This report incorporates many of those suggestions and <br />therefore has a different format than previous ,years reports. Several of <br />the hydrology figures no~v show both this years and previous years data in a <br />wsy that can be added to in future reports to provide an easy reference to <br />water quality trends. Streamfiow records are very limited compared to <br />previous year's reports. This is due to damage to the stations from spring <br />snorrmelt in 1994 and not to a desired change in format. <br />The report will concentrate on providing information pertinent to the <br />Edna Mine's hydrology. The mine's possible potential impact on the Trout <br />Creek Alluvial Valley Floor by increasing the dissolved solids concentra- <br />tion in the water is probably the most important consideration. Much of <br />the monitoring system is designed to record the mines potential to affect <br />this area. Another concern is the cumulative impacts of mines. in the Trout <br />Creek/Yampa River drainage on water quality, particularly dissolved solids. <br />This issue became more important after the Edna Mine's permit was issued as <br />a result of other proposed mines. Thus, while the monitoring system was <br />not specifically designed to address this issue, it was designed to <br />quantify the mines impact on the hydrologic system on and off the mine site <br />