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' SURFACE WATER MONITORING <br />' Two locations on Foidel Creek in the vicinity•of Mine 3 are monitored. USGS <br />t Site 09243900 (Site 900) 1s located approximately one-half mile upstream of the <br />confluence with Middle Creek. Site 60 is located downstream of Site 900. Three <br />locations on Middle Creek are monitored. USGS Site 09243700 (Site 700) is <br />' located approximately one mile upstream of the confluence with -Foidel Creek`. <br />Site 18 is located-approximately one-half mile upstream of the confluence with <br />' Foidel Creek. Site 29 is located approximately one mile downstream of the <br />confluence with Foidel Creek. <br />' Flows ' <br />' The streams are gaged at the two USGS sites and at Site 29. Due to the size of <br />the stream at the locations, they must be rated instead of using a more accurate <br />' controlled section such as a flume. •The USGS maintains continuous recorders at <br />Sites 700 and 900. Plots of the historic flow measurements on Foidel Creek are <br />' presented on Figures 14 and 15. Plots of the historic flow measurements on <br />Middle Creek are presented on Figures 16 through 18. The flow rate data is <br />' summarized on Table 17. The data shows the typical seasonal variation with a <br />rapid rise and fall of flow rates during spring runoff. Historically all three <br />' sites o-ften did not flow during the fall and winter. Due to the effects of <br />upstream mining activities at other mines Sites 900 and 29 have flowed <br />year-round since 1985. Peak flows in Middle Creek are approximately double <br />' those in Foidel Creek. <br />-~1. ._ .~- - - - -- - <br />_~.:~-4A nos beer. ,., sirce .: t•~as <br />' Watereq@a19'i;y~al ien in i5c ~. Une s~:oi ~ ~;ei i, ;.:s ~, <br />' Water quality <br />l samples are collected at <br />d all the sites on a regular basis. <br />Pl <br />t <br />h <br />h 27 <br />T <br />bl <br />18 The <br />f <br /> water qua <br />ity summaries are presente s <br />t <br />roug <br />. <br />o <br />on <br />a <br />es o <br /> historic water quality data for Foidel Creek are presented on Figures 19 and <br />' 20. "-Plots of historic water quality data for Middle Creek are presented on <br /> Figures 21 through 23. <br /> <br />1 <br /> <br />-5- <br />