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• HYDROLOGY IMPACTS 1989 <br /> SURFACE WATER-EXISTING MONITORING AND IMPACTS <br /> Streams• <br /> During 1989, seven Parshall flume and 30-day continuous recorder <br /> stations in the Terror Creek, Roatcap Creek, and Steven's Gulch <br /> drainages were monitored. These were stream gauge Nos. SW-1, SW- <br /> 2, SW-5, SW-6, SW-10, SW-11, and SW-12. One crest stage gauge <br /> station (SW-4) was also monitored in the upper Terror Creek <br /> drainage. <br /> Flows in all the streams were lower than previous years especially <br /> in the late summer and fall. Zero flows were recorded in Steven's <br /> Gulch from June through the end of monitoring in October. <br /> Flows in the Roberts-Stucker Ditch (SW-12) and the Terror Ditch <br /> (SW-10) were regulated at the headgates on the ditches by the <br /> respective ditch companies. These flows were lower than the past <br /> years, especially in the Roberts-Stucker Ditch. <br /> Similar to past years, the pH, electroconductivity, and total <br /> dissolved solids increased during the low flows of Fall (Figures <br /> • 1 & 2) . Concentrations of the major chemical ions also increased <br /> for the most part as flows decreased as could be expected. This <br /> was particularly pronounced in East Roatcap Creek. <br /> Ponds <br /> In 1988 , 44 ponds were monitored as part of the monitoring program <br /> Twenty-one of these are fed to some degree by a spring or seep in <br /> addition to runoff. <br /> Changes in chemical parameters throughout the year were dependent <br /> on amount of runoff throughout the year, amount of inflow if any <br /> from springs or seems, and the amount of evaporation. In general <br /> pond water quality had higher dissolved solids levels in 1989 than <br /> in previous years due to decreased precipitation. <br /> No evidence of impact due to mining was indicated in the 1989 data. <br /> • <br />