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River sampling <br />Strawberry River sampling was done in 2002. Species presence in areas downstream of <br />the stilling basins was monitored by electrofishing the three-mile section of river directly below <br />the weir before and following runoff. A canoe equipped for electrofishing using a generator and <br />a Coffelt 2-C electrofishing unit was used to electrofish the entire width of the stream channel as <br />crews waded upstream (Figure 4). In addition to sampling this three-mile section of the <br />Strawberry River, using the same sampling technique, crews also electrofished parts of the <br />Duchesne River around the Knight Diversion (located approximately 5 miles upstream from the <br />town of Duchesne) and Myton Diversion (approximately 20 miles east of Duchesne on Highway <br />40) in 2004 to evaluate the presence of target species (Figure 1). <br />Reservoir sampling <br />In 2005, the reservoir near the spillway was sampled using gill nets to evaluate <br />escapement potential. Gill nets were set for three nights at the beginning of the spill. <br />Escapement rates <br />Following field activities, an estimate of the rate of escapement was calculated by <br />dividing the number of fish captured in the spillway basin relative to the volume of water (AF) <br />discharged over the spillway (e.g., 46 fish/15,533 AF = 0.0003 fish/AF). This discharge data was <br />available from dam operation records at the Central Utah Water Conservancy District. This <br />calculation was not done for results in the outlet basin due to the inability to prevent fish from <br />moving back and forth between the stilling basin to the river. <br />8 <br />