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HYDROLOGY IMPACTS 1988 <br />• <br />SURFACE WATER-EXISTING MONITORING AND IMPACTS <br />Streams• <br />During 1988, seven Parshall flume and 30-day continuous recorder stations in the <br />Terror Creek, Roatcap Creek, and Steven's Gulch drainages were monitored. These <br />were stream gauge Nos. SW-1, SW-2, SW-5, SW-6, SW-10, SW-11, and SW-12. One <br />crest stage gauge station (SW-4) was also monitored in the upper Terror Creek <br />drainage. <br />Monthly flows in the West Fork of Terror Creek (SW-1) were similiar to those re- <br />corded in 1987, but somewhat lower than the previous years. Maximinn and minimian <br />flows were most similiar to 1986, while being lower than other years that were <br />monitored. Chemical parameters remained consistent with past years. <br />SW-2 which is located in the East Fork of Terror Creek had flows during 1988 <br />similiar to the previous two years but lower than other years. Field and chem- <br />ical parameters fluctuated as flows decreased and increased. <br /> Flows in both East and Main Roatcap Creeks (SW-6 and SW-11) were lower than pre- <br /> vious years. <br /> Flows in the Roberts-Stucker Ditch (SW-12) and the Terror Ditch (SW-10) were re- <br />• gulated at the headgates on the <br />These flows were similiar to past ditches <br />years. by the respective <br />Field parameters and ditch companies. <br />chemical charac- <br /> teristics were nearly the same as the orig inating streams. <br />similiar to past years, the pH, electroconductivity, and total dissolved solids <br />increased during the low flows of Fall. Concentrations of the major chemical <br />ions also increased for the most part as flows decreased as could be expected. <br />Ponds <br />In 1988, 44 ponds were monitored as part of the monitoring program. Twenty-one <br />of these are fed to some degree by a spring or seep in addition to runoff. <br />Changes in chemical parameters throughout the year were dependent on amount of <br />runoff throughout the year and amount of inflow if any from springs or seeps. <br />No evidence of impact due to mining exists and relative to no ponds being under- <br />mined during 1988. Spring and Pond 13-6 was close enough to being undermined <br />that it may be considered undermined. <br />• <br />