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<br />"1 ') 1 ".-" I <br />LHi. iJ J 't <br />Revised Supplemental Draft Environmental Assessment-Chapter l-Introduction <br /> <br />Recreation Resources <br /> <br />River Boating-historically, the dam has been a barrier to recreational boating. This <br />fish passage project could affect future recreational boating along the Colorado River in <br />the vicinity of the Price-Stubb Diversion Dam. This Draft EA evaluates potential impacts <br />associated with Colorado Department of Transportation approval or disapproval of <br />white water recreational features designed to enhance river recreation opportunities. <br /> <br />Public Safety-the dam poses a significant safety threat to all forms of water <br />recreation in the vicinity of the dam. <br /> <br />Land and Facility Resources <br /> <br />Protect Existing Structures-the nearby Interstate 70, railroad, and Colorado River <br />Siphon were designed and constructed with the dam in place. Evaluating the effects of <br />the alternatives on the integrity and use ofthese structures is necessary. <br /> <br />Railroad and landslide Stability- Union Pacific Railroad tracks run along the <br />Colorado River past the Price-Stubb Diversion Dam. Fish passage alternatives could <br />affect the stability of an existing landslide area and railroad. The landslide has previously <br />caused damage to the tracks. <br /> <br />Ownership of Dam and Lands-before any modification to the dam and site could be <br />made, permission would be needed from the dam owners and adjacent land owners to <br />access the site and/or use their land and facilities. <br /> <br />Unique Geographic Features <br /> <br />Floodplain and Wetland Protection-The Colorado River provides highly valued <br />riparian habitat and floodplain functions that need to be considered as fish passage is <br />restored. <br /> <br />Fish and Wildlife Resources <br /> <br />Effects on Endangered Colorado River Fishes-providing passage at the dam is <br />needed to allow endangered fish access to upstream habitat (see background information <br />on page 3). Passage actions should complement other Recovery Program efforts such as <br />stocking endangered fish, controlling competition or predation by nonnative fish, and <br />restoring habitat. <br /> <br />5 <br />