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<br />r' <br /> resumed below TR-b rendering the station unsuitable as a flow monitoring <br /> location. In June 1994, a continuous flow monitoring station was installed <br /> at a new location downstream of the previous location. Calibration flow <br /> measurements taken at TR-b during 1999 only covered a small range of flow <br /> variation due to the normally low flow during the summer and fall of the <br /> year and the diversion of irrigation water. Additional calibration flow <br />~~ and cross-section measurements will be taken during 1995 in an attempt to <br /> develop a stage/flow rating curve representing the full range of flow <br /> conditions. <br />~1 SURFACE WATER QUALITY <br /> As previously mentioned, the mine monitors the water quality along <br /> Trout Creek through analysis of the parameters listed on Table 4.6-59, <br /> Section 4.6.8.4 of the permit. Results of the analyses are discussed <br /> below. <br />Temperature and pH <br />Temperature (Figure 2) and pH (Figure 3) exhibited the same trends in <br />1999 as found during baseline studies and previous years monitoring. <br />Specifically, patterns in temperature are seasonal with slight variations <br />in pH. Overall, Trout Creek as remained alkaline in 1994. <br />1 Total Suspended Solids <br />Since 1984, Total Suspended Solids (TSS) levels show a general <br /> continuing decrease in concentration (Figure 4). Periodically, this <br />~, general pattern is interrupted, as occurred in 1988. As previously <br /> discussed, the flooding which occurred in 1984 caused some rather dramatic <br /> changes to the stream channel and TSS levels. The TSS values obtained <br /> since 1988 suggest that the reaches along Trout Creek that were affected <br /> during the high flows of 1984 have again stabilized with TSS values being <br /> consistent with values obtained during baseline sampling. The relatively <br /> low TSS values collected during 1992 through 1999 appear to be the result <br /> of two conditions. First, the recently stabilized stream banks have begun <br /> to reestablish vegetation and second, the section of the creek between TR-A <br /> and TR-B has become an inundated marsh as result of continuous string of <br /> 5 <br />