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<br />Sites 10 or 12 are flowing. However, field parameters and -flow <br />estimates may sometimes be provided voluntarily when not required. This <br />site is upstream of Seneca II Mine discharges. <br />- Surface Water Site SW-52-13 (SSF13). This site monitors Fish Creek <br />downstream of its confluences with Cow Camp Creek and Bond Creek. It is <br />monitored at the same frequency as Site 11. The increase in TDS values, <br />from Site 11 to Site 13, was from 530 to 590 mg/1 (2$ increase) in May. <br />On Page 7-247 of the Seneca II Mine Probable Hydrologic Consequences <br />(PHC), predictions were made for the TDS increases to be observed on <br />Fish Creek during the months of June and July due to discharges from the <br />Seneca II Mine. Zn June, an increase from 421 to 497 mg/1 (18$) is <br />predicted. In July, an increase from 533 to 607 mg/1 (13$) is <br />predicted. However, neither lower Bond Creek nor lower Cow Camp Creek. <br />was flowing in June or July this year. .As stated in the previous <br />paragraph, only a 2$ increase in TDS was noted between the two sites in <br />May. It appears that the Seneca II Mine has little impact on Fish~- <br />Creek. Water discharged from the mine is lost to stock ponds, <br />evapotranspiration, and the alluvium as it flows through Twentymile <br />Park. Dissolved solids from mine discharges are diluted during the <br />snowmelt runoff in March and April (prior to the irrigation season) by <br />high stream flows with relatively low TDS concentrations. The natural <br />conditions in Twentymile Park appear to have a much greater impact on <br />the water quality of Fish Creek. <br />Little Grassy Creek Drainage. Two monitoring sites lie within the <br />Little Grassy Creek drainage: Site 5, located in the southwest portion <br />of the permit area and NPDES Discharge Point 002, also known as the <br />Wadge Impoundment. <br /> - Surface Water Site SW-52-5 (SSLGS). Site 5 drains the upper reaches <br /> of Little Grassy Creek which are undisturbed by mining. A comparison of <br /> its hydrograph to that of NPDES 002 indicates that Site 5 is a <br /> l <br />i <br />l <br />i ib h <br />fl <br />i <br />hi <br />b <br />i <br /> re <br />at <br />ve <br />y m <br />nor contr <br />utor to t <br />e <br />ow <br />n t <br />s <br />as <br />n. <br />IS <br />