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Colorado Basin The following federal and/or state listed fish species are found in the Colorado Basin: • Colorado Pikeminnow (ptychocheilus lucius): Federal Endangered, State Threatened. Critical Habitat has been designated in Mesa and Garfield Counties, in the Colorado River and its 100-year flood plain, from the Colorado River Bridge at exit 90 north off Interstate 70 to North Wash including the Dirty Devil arm of Lake Powell up to the full pool. Razorback Sucker (Xyrauchen texanus): Federal Endangered, State Endangered. Critical Habitat has been designated in Mesa and Garfield Counties, in the Colorado River and its 100-year flood plain, from Colorado River Bridge at exit 90 north off Interstate 70 to Westwater Canyon including the Gunnison River and its 100-year flood plain from the Redlands Diversion Dam to the confluence with the Colorado River. • Bonytail Chub (Gila elegans): Federal Endangered, State Endangered. Critical Habitat has been designated in Mesa County, in the Colorado River from Black Rocks to Fish Ford. • Humpback Chub (Gila cypha): Federal Endangered, State Threatened. Critical Habitat has been designated in Mesa County, in the Colorado River from Black Rocks to Fish Ford River. (Reference: 50 CFR 17, Federal Register, Vol 59, No. 54, Monday, March 21, 1994, pp 13397-13399) • Colorado River Cutthroat Trout (Oncorhynchus clarki pleuriticus), SC • Mountain Sucker (Catostomus playtrhynchus), SC • Iowa Darter (Etheostoma exile), SC • Rio Grande Chub (Gila pandora), SC • Colorado Roundtail Chub (Gila pandora), SC (References: http://wildlife.state.co.us/species_cons/list.as~ and http://ndis. nrel. colostate. edu/wildlife. as~) The following federal and/or state listed species may be found in the Colorado Basin: SPECIES STATUS Federal State • Wood Fro Rana s lvatica SC • Northern Leo ard Fro Rana i iens SC • Midget Faded Rattlesnake (Crotalus viridis concolor) SC