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<br />reestablishing a monitoring station was not possible. In 1988, a new stable <br />reach of the stream channel was located and a monitoring station was <br />reestablished. However, the majority of the 1988 season was spent developing <br />a stage rating curve for the channel cross section with flow measurements <br />1 being taken on a sporadic basis rather than in conjunction with water quality <br />sampling periods. instantaneous flow measurements were taken during 1989 in <br />' conjunction with water quality samples taken at TR-D, except for the October <br />sampling period. Between the sampling periods of September and October in <br />1 1989, beaver activity both above and below TR-b occurred causing the location <br />of TR-B to become part of an inundated beaver pond. High flows, in part due <br />to beaver activity, destroyed the staff gauge at TR-b in 1990 and again in <br />1991. As a result, no instantaneous streamflow data was collected in 1990, <br />while 1991 had one measurement in May. While data in 1992 was retrieved, it <br />is unknown whether this or any location along the downstream portion of stream <br />channel near the permit boundary can be retrieved from the beavers and used as <br />' a flow monitoring station. <br />SURFACE WATER QUALITY <br />As previously mentioned, the mine monitors the water quality along Trout Creek <br />through analysis of the parameters listed on page 4.6-143 of the permit. <br />F.e sults of this analysis are discussed below. <br />1 TArtmo~ a +r and off <br /> Temperature <br />th <br />d <br />i and pH (Figure 1) exhibited the same trends <br />li <br />b <br />t <br />di <br />S <br />ifi <br />ll <br />tt <br />i in 1992 as found <br /> ur <br />ng <br />e ase <br />ne s <br />u <br />pec <br />ca <br />y, pa <br />erns <br />n <br />es. temperature are <br /> seasonal, a s established during baseline, and appear to suggest a general <br />' warming of the creek waters. Slight variations in pH al so occurred <br /> seasonally, though overall Trout Creek remained alkaline in 1992, <br /> <br />' Specific conductivity levels (Figure 2) for September and October 1992 were in <br />line with that measured prior to 1990. Data taken between October 1990 and <br />August 1992 is believed to be invalid due to instrument errors. All four <br />1 <br />4 <br /> <br />