Laserfiche WebLink
Special Man ement <br />Measures to insure that adequate flows continue in the White River will need to the <br />implemented. Protection of backwater and other low water velocity environmental will be <br />required. The problems associated with nonnative fish predation and competition will need <br />to be addressed. <br />Duchesne River - Lower 2.5 Miles <br />Boundary Delineation: Utah, Uintah County. The Duchesne River and its 100-year <br />floodplain from RM 2.5 in T.4S., ME., section 30 (Salt Lake Meridian) to the confluence <br />with the Green River in T.SS., R.3E., section 5 (Uintah Meridian). <br />Shoreline Ownership: Tribal, 88.0 percent; Private, 12.0 percent. <br />Overlap with Proposed Critical Habitat for: None. <br />Occurrence: <br />Historical <br />No historic data on fish species abundance in the Duchesne River is available. However, <br />razorback suckers were probably once common there. This is suggested, as Jordan (1891) <br />indicated that razorback suckers were common throughout the Colorado River basin. <br />Recent <br />Recent collections indicate that razorback sucker are seasonally common in the mouth and <br />lower Duchesne River (Tyus 1987). <br />Description of Habitat: <br />Historically, much more of the Duchesne River was accessible for use by the razorback <br />sucker. But because of diversions and water depletions, only the lower portion is presently <br />used by razorback sucker. <br />The Duchesne River enters the Green River at RM 249. The lower 2.5 miles of the <br />Duchesne River is predominately slow runs and eddies with cobble and silt substrates. <br />During spring runoff in the Green and Duchesne Rivers, the lower Duchesne River floods <br />and creates large eddies and slow runs. <br />57