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' Over the 1994-1995 seasons, a total of five cross-sections were developed and compared to ensure channel stability. An averaged cross-section was then developed to compute astage/rating curve. The stage rating curve data covered Flows ' _ i rzs~ ranging from approximately I I cfs to 120 cfs. The equation and r for the curve are as follows: y = 57.092x~ , where y = flow in cfs and z =depth of flow; r~ = 0.98. As at TR-a, cross-section measurements were taken at TR-b during 2000, which ' verified that the channel configuration had remained stable. Flow measurements for TR-a and TR-b are in Appendix A. 1 1 1 1 1 1 1 1 SURFACE WATER QUALITY As previously mentioned, the water quality along Trout Creek is monitored via the parameters listed on Table 4.6- 54, Section 4.6.8.4 of the permit. Results of the analyses are discussed below. Temperature and pH Temperature (Figure 2) and pH (Figure 3) exhibited the same trends in 2000 as found during baseline studies and previous years monitoring. Specifically, patterns in temperature are seasonal with slight variations in pH. Overall. Trout Creek has remained alkaline throughout the period of record. Total Suspended Solids Since 1989, Total Suspended Solids (TSS) concentrations have remained relatively constant (Figure 4). The relatively constant TSS values observed over much of the period appear to be the result of two conditions. First, the stream channel, significantly altered during a 1984 flood, has stabilized and the stream banks have reestablished vegetation. Second, the section of the creek between TR-A and TR-B has become an inundated marsh as result of a continuous string of beaver ponds. Additionally, several long stretches of the creek between TR-B and TR-D have also become marshes due to numerous beaver dams. Periodically, this general pattern is intertupted, as occurred in 1991, 1993 and 1995. The "spikes" in TSS levels during these years appear to be related to peak flow conditions along the creek. Specific Conductivity Specific conductivity (Figure 5) from September 1992 through the end of the report period were similar to values obtained prior to October 1990. Data taken between October 1990 and August 1992 are believed to be invalid due to instrument ertors. TDS values obtained during these same periods do not reflect the increases, therefore it is believed that the data excursions can be attributed to errors with the instrumentation rather than a reflection of actual field conditions. New field equipment has been used since September 1992 along with laboratory verification. The values shown in Figure 5 from 1992 through 1994 are the laboratory values. Since the field values and laboratory values have been in close agreement since 1992, values provided beginning in 1995 are field values. 4