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Schwartn~ older Mine -Hydrologic Evaluation of Mine Closure and Reclamation 13 <br />eo 0 <br />~o <br />40.0 <br />W <br />u <br />J~ () <br />LL <br />20.0 <br />inn <br />500 <br />50 <br />4 QD <br />3 5U <br />r <br />d <br />3 00 u <br />C <br />C <br />2.50 0 <br />A <br />.n <br />2~ <br />a <br />~ so <br />i o0 <br />0.50 <br />0 00 <br />Figure 6. Average Flow Rates in Ralston Creek vs. Monthly Mean Precipitation <br />3.2 Flow in Ralston Creek at the Srhwartzwalder iv1ine <br />A series of nine gaging,tation, ~~cre established in Ralston Creek near the mine site (Figure ~. fable ~) ti)r <br />baseline characterization during 1998-1999. "fhe locations were selected to have straight, unitbrm stretches <br />of channel with smooth banks and beds of a fairl}~ permanent nature, and were located far from tlow <br />disturbances caused by tumours. Semi-permanent staff gages were installed at each statron~, and tlow was <br />measured using a flow meter and wading rod on October 1998, Mav 1999, July 1999, and August 1999. <br />These velocity-area measurements (Appendix A) were used to develop discharge rating curves for each <br />station (Appendix A). from which staff gage readings of stream stage could be converted directly to Clow <br />talcs. <br />' Stage rrcorders were imtalled h} Cotter Corporation at nine ufdie ten surface water monitoring stations. Denier Water maintains <br />and records slow at the truth station, at the Long Lake Feeder Ditch. <br />~ t 09 ~ ~~ t t ~ ~ Whetstone Associates • <br />Feb Mar Apr May Jun Jul Aug Sep Od Nov Oec <br />