Laserfiche WebLink
1991 = 0 .112 cfs <br />• 1990 = 0 .067 cfs <br /> 1989 = 0 .108 cfs <br /> 1988 = 0 .104 (reservoir did not completely fill until February 25, <br /> 1988). <br />Review of the above table shows that this year's discharge was about average, being ranked <br />~ as the seventh highest in eleven years. Review of the TDS plot indicates an increasing <br />trend. <br />- Surface Water Site SW-52-12 (SSB12). This slte monitors Bond Creek at its confluence <br />with Fish Creek. It is monitored Hay through September on a monthly basis. This year, no <br />flow was present at this Bite during the July, August, and September visits, although <br />NPDES 008 upstream was Flowing continuously. The TDS plot indicates a slightly increasing <br />trend. <br />- Surface Water Site SW-S2-11 (S SF13).~ This site monitors Fish Creek upstream of its <br />• ~ confluence of Cow Camp Creek. It is monitored May through September on a monthly basis <br />but only if either Sites 10 or 12 are flowing. This ai to is upstream of Seneca II Mine <br />discharges. <br />- Surface Water Site SW-52-13 (SSF13). This site moor toss Fish Creek downstream of its <br />confluences with Cow Camp Creek and Bond Creek. It rs monitored at the name frequency as <br />Site 11. The increase in TDS values, from Site 11 to Site 13, was from 290 to 350 mg/1 <br />1214) in May and from 1090 to 1120 mg/1 (38) in June. <br />On Page 7-247 of the Seneca II Mine Probable Hydrologic Consequences (PRC), predictions <br />were made for the TDS increases to be observed on Fish Creek during the months of June and <br />July due to discharges from the Seneca II Mine. In June, and increase from 421 to 997 <br />mg/1 (188) was predicted, while an increase from 1090 to 1120 mg/1 (38) was observed this <br />year. In July, an increase from 533 to 607 mg/1 (138) was predicted, however, neither <br />lower Bond Creak nor lower Cow Camp Creek was flowing in July this year. It appears that <br />the Seneca II Mine has little impact on Fish Creek. Water discharged from the mine is <br />lost to stock ponds, evapotranspiration, and the alluvium as rt flows through Twentymile <br />• Park. Dissolved solids from mine discharges are diluted during the anowmelt runoff in <br />March and April (prior to the irrigation season) by high stream flows with relatively low <br />13 <br />