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To ensure the accuracy of the stream flow data, channel cross-sections at Site TR-a and TR-b <br />are surveyed annually to verify streambed stability. Figure 1 shows channel cross-sections <br />that were developed as part of an annual survey. These results confirm that the streambed <br />configuration has remained fairly constant and therefore verify streambed stability. <br />Irrigation ditch flow observations (flowing/not flowing and approximate flow) were made <br />' monthly from April through October of 2008 at Site TR-A. Flow was observed in the <br />irrigation ditch at site TR-A during June of 2008. Instantaneous flow observations are <br />provided in Table 2. <br />3.2 NPDES Monitoring <br />' Monitoring of point discharges from sedimentation impoundments is accomplished under <br />Colorado Department of Public Health and Environment Colorado Permit Discharge System <br />Permit CO-0032638. Copies of required Discharge Monitoring Reports are provided to the <br />' Colorado Division of Reclamation, Mining and Safety under separate cover, and are included <br />in this report by reference. <br />3.3 Surface Water Quality <br />Surface water sampling is performed in accordance with EPA approved methods and <br />instrumentation. As previously mentioned, the water quality along Trout Creek is monitored <br />via the parameters listed on Table 4.6-54, Section 4.6.8.4 of the permit. Tabular analyses <br />results for monitoring sites TR-A, TR-B, TR-C and TR-D are found in Tables 3, 4, 5 and 6. <br />Results of the analyses are discussed below. <br />3.3.1 Surface Water Temperature <br />Chart 2 shows temperature values for monitoring sites TR-A, TR-B, TR-C and TR-D for the <br />period of record. Temperature exhibited the same trends in 2008 as found during baseline <br />studies and previous years monitoring. Specifically, patterns in temperature are seasonal, <br />warming until July or August and than cooling throughout the remaining sampling season. <br />Surface water temperature for 2008 was colder than average for the period of record due to a <br />harsh winter and cool ambient temperatures. The lowest temperature in 2008 was recorded at <br />monitoring site TR-A in October with a reading of 1.2 °C and the high was recorded at <br />monitoring site TR-B in August with a reading of 16.0 °C. <br />3.3.2 Surface Water pH <br />Chart 3 shows pH concentrations for monitoring sites TR-A, TR-B, TR-C and TR-D for the <br />period of record. Values of pH during 2008 were consistent with baseline studies and <br />previous monitoring. There is no apparent trend regarding pH although only slight variations <br />occur during the monitoring season. Overall, Trout Creek has remained slightly alkaline <br />throughout the period of record. The lowest pH value in 2008 was recorded at monitoring site <br />3