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• cover of aspens or conifers. Herbaceous species and woody plant <br />communities dominate the lover portion of the basin. Middle Creek <br />is an intermittent stream according to the definition under Rule <br />1.04. Most of the stream is affected by agricultural practices such <br />as irrigation, hay farming and grazing, as well as surface coal <br />mining activity. <br />Fish Creek arises in the Dunkley Flat Tops area and flows <br />northeast into Trout Creek downaCream from the confluence with <br />Middle Creek. IIpper Fish Creek is also heavily vegetated with <br />aspens and conifers while lower portions are more seric and support <br />sagebrush and grasses. Most of Fiah Creek is also affected by <br />agricultural and some mining activity. <br />• <br />Habitat Description <br />Middle Creek. Middle Creek is a small stream (1.Sm wide) with <br />low gradient throughout the study area. It flows through a narrow <br />valley at the former Aquatic Sampling Site #1, having a well-defined <br />channel and a gradient of 25. Overhanging vegetation, stable <br />undercut banks and pools provide fish habitat at Chis station. <br />During summer months, an irrigation diversion just upstream <br />withdraws a considerable portion of the flow. Substrate at Station <br />1 is primarily cobble and gravel in the riffle areas with sand and <br />silt in pools, Below Station 1, Middle Creek flattens out to a low <br />gradient (0.5-0.65), widely meandering pasture stream. Foidel Creek <br />• and a small intermittent stream eater Middle Creek upstream of <br />Station 2, which increases the flow in spring and summer. Lover <br />2.04-99 <br />