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Total Suspended Solids <br />Since 1989, Total Suspended Solids (TSS) concentrations have remained relatively <br />constant (Figure 4). The relatively constant TSS values observed over much of the period <br />appear to be the result of two conditions. First, the stream channel, significantly altered <br />during a 1984 flood, has stabilized and the stream banks have reestablished vegetation. <br />Second, the section of the creek between TR-A and TR-B has become an inundated marsh as <br />result of a continuous string of beaver ponds. Additionally, several long stretches of the creek <br />between TR-B and TR-D have also become marshes due to numerous beaver dams. <br />Periodically, this general pattern is interrupted, as occurred in 1991, 1993, 1995, and <br />2003. The "spikes" in TSS levels during these yeazs appear to be related to peak flow <br />conditions along the creek. TSS concentrations during the 2006 sampling season closely <br />resemble those of 2005, decreasing as the season lengthens. TSS concentrations are provided <br />in tabular format in Appendix A. <br />Specific Conductivity <br />Specific conductivity (Figure 5) from September 1992 through the end of the report <br />period was similar to values obtained prior to October 1990. Data taken between October <br />1990 and August 1992 are believed to be invalid due to instrument errors. TDS values <br />obtained during these same periods do not reflect the increases; therefore it is believed that the <br />data excursions can be attributed to errors with the instrumentation rather than a reflection of <br />actual field conditions. <br />New field equipment has been used since September 1992 along with laboratory <br />verification. The values shown in past reports from 1992 through 1994 are the laboratory <br />values. Since the field values and laboratory values have been in close agreement since 1994, <br />values provided beginning in 1995 are field values. Specific conductivity has exhibited the <br />same trends in 2006 as found during baseline studies and previous years monitoring. Specific <br />conductivity concentrations are provided in tabular format in Appendix A. <br />A <br />