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• while NPDE9 OOS floes continuously. This floe decrease is due io evapotranspiration and <br />infiltration losses. The TDS plot seems to indicate a level trend. <br />Suslace Water Site SW-S2-11 (98F11). This site monitors Fish Creek upstream of its <br />confluence of Cow Camp Creek. It is monitored Nay through September on a montRly basis <br />and only if either Sites 10 or 12 are flowing. This site is upstream of Seneca II Nine <br />discharges: therefore, its water chemistry is primarily the result of natural or <br />background conditions. <br />Surface Water Site 9W-92-13 (9SF13). 1T11a site monitors Fiah Creek dovnstzeam of its <br />confluence with Bond Creek. Ii is monitored at the same frequenry as Site 11. TD9 valves <br />at Site 13 were 140 to 9S percent of those observed at Site 11. <br />To summarize water quality in the Fish Creek Dasin, it appears that the 6eneca II Nine has <br />little impact on Fish Creek. Water discharged from the mine is lost to stock ponds, <br />evapotranspiration, and the alluvium as it floes through Tventymile Park. Dissolved <br />solids from mine dl9aharge9 are diluted during the snowmelt runoff in Narch and April <br />• (prior to the irrigation season) by high stream floes with relatively law TDS <br />concentrations. The natural condi tiona in 1ti+entymile Park appear to have a much greaser <br />impact on the eater quality o£ Fish Creek. W a final note, the irrigation ditch that <br />diverts eater from Fish Creek ]ust upstream of the confluence with Bond Creek was not <br />flowing during the July and August visits. <br />Little Grassy Creek Drainage. Tvo monitoring sites lie within the Little Grassy Creek <br />drainage: surface Wares Site SW-32-5, located in the southwest portion of the permit area <br />and NPDE9 Discharge point 002, also known as the Wadqe Impmundment. <br />Surface Water Site 3W-32-5 (SSLGS). Bite 5 drains the upper reaches of Little brassy <br />Creek which are undisturbed by mining. Comparisons of its hydrograph to that of NPDE9 002 <br />indicates that Site 5 Ss a relatively minor contributor to the floe in this basin. <br />HPDEB Discharge Point 002 (HPDE92). Hydrographs based on weeLly floe measurements are <br />presented in Appendix 8. The hydrographs consist of two pages, the first is for data this <br />year, and the second shoes all historical data. ^NO flow" conditions do not show up on <br />• this or any other surface eater hydrographs. Review of the second hydrogzaph shows that <br />this year's peak flaw vas the highest since 1955. This is also confirmed by the follovinq <br />11 <br />