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<br /> <br />SURFACE WATER MONITORING <br />' Two primary locations on Foidel Creek in the vicinity of the mine portal are <br />monitored. Station 800 is upstream of the portal and is operated by the <br />' USGS (Station 09243800). Station 8/2005 (referred to as Station 8 in this <br />report) is a short distance downstream of the portal: Water quality samples <br />are collected at Station 8 and flow readings are taken at Station 2005. <br />' Three primary locations on Fish Creek are monitored. Station 16 is located <br />upstream of Mine No. 2. It replaces Site 1001, which was located upstream <br />' of the point where Fish Creek enters Twentymlle Park. Site 1002/26• <br />(referred to as site 1002 in this report) is located on Fish Creek about <br />one-half way through its reach in Twentymile Park. Site 1003 is located in <br />the north end of Twentymile Park approximately 1-1~ miles upstream of the <br />confluence with Trout Creek. In addition, two sites to measure stream stage <br />only were established in 1987; Site 304 on Fish Creek adjacent to Well <br />006-AZ-3 and Site 307 on Foidel Creek adjacent to well 008-AU-2. <br />Flows <br />' The streams are gaged at all five primary locations. Typically, due to the <br />' size of the stream at the locations, they must be rated instead of using the <br />more accurate controlled section such as a flu However, due to extremely <br />low flows a cutthroat flume was used to rat the tream. The flow data for <br />the two streams l~ summarized on Table 24. "Plots of the historic flow <br />measurements on Foidel Creek are presented on Figures 13 through 16. The <br />data shows the typical seasonal variation with a rapid rise and fall of flow <br />rates during spring runoff. Water year 1987 was a very low runoff year. At <br />' Stations 800 and 8 the flow is maintained essentially year-round by the <br />discharge from the undergr//ound mine and discharges related to the surface <br />' mines. The data indicateb a fairly good correlation between upstream and <br />downstream stations on eac stream. <br />Water Quality <br />Water quality samples are collected at all the primary sites on a regular <br />basis. The water quality summaries for Foidel Creek are presented on Tables <br />' 25 to 28. The water quality summaries for Fish Creek are presented on <br />-6- <br />