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<br />, <br /> <br />be able to protect and recover the endangered fish while providing a means for water <br />conservation and development. <br /> <br />Hoover Dam Changed Operation to Protect Native Fish (ArizonalNevada) <br />Reclamation has voluntarily changed operation of Hoover Dam to control the level of Lake <br />Mohave, immediately downstream. for the protection of the razorback sucker and bonytail chub. <br />During the February-April spawning period. Mohave's elevation is not dropped more than 2 feet <br />in any ten-day period. Between April and the end of July, the reservoir is kept above elevation <br />640 to protect the young fish that are being grown in the backwaters. From the end of July to <br />mid-September, the reservoir is not dropped below elevation 637 to protect the young fish. From <br />mid-September to the first of October, the lake is then dropped below elevation 635 for at least <br />ten days while the one-year-old razorbacks are "harvested" from the grow-out coves, PIT tagged, <br />and returned to big waters. This is a change from historical operations. <br /> <br />Stanislaus River Changed Operation to Protect Sulmon (California) <br />Reclamation has assisted salmon with "pulse" flows on the Stanislaus River from New Melones <br />Reservoir for the spring run salmon. <br /> <br />Ruedi Reservoir Recovery Program for Endangered Fish (Colorado) <br />Ruedi Reservoir is part of Reclamation's Fryingpan-Arkansas Project which collects water on the <br />west slope of the Rocky Mountains in Colorado and moves it to the dryer east slope for irrigation, <br />municipalities, recreation, fish and wildlife. and other uses. Each year since 1989 a portion of this <br />water has been released to benefit habitat for endangered fish in the Upper Colorado River. <br />Because a declining reservoir level could potentially affect recreation facilities along the popular <br />Ruedi Reservoir, some communities in the Roaring Fork Valley have opposed the releases. <br /> <br />Reclamation participates in the Recovery Program for Endangered Fish of the Upper Colorado <br />River Basin via Ruedi Reservoir to reestablish self-sustaining populations of Colorado squawfish, <br />humpback chubs, bonytail chubs, and razorback suckers while providing for future water <br />development. Uncontracted water is released from Ruedi Reservoir for the purpose of <br />maintaining flows for endangered fish species in a critical 15 mile stretch of the Colorado River. <br />Each year the releases have been successfully timed so that all recreation facilities are available for <br />use during the recreation season. <br /> <br />Aspinal Unit and Gunnison River Agreement for Endangered Fish Protection (Colorado) <br />An interim contract has been executed to provide flows to study and protect endangered fish <br />species in the lower Gunnison River and to operate a fish passage constructed in 1995-96 around <br />the Redlands Diversion Dam. Reclamation is working on long-tenn agreements to deliver water <br />to the Black Canyon of the Gunnison National Monument and to deliver water for endangered <br />fish needs. Such a contract is an innovative way to protect both environmental and water user's <br />interests. Biologists have detennined that endangered Colorado squawfish can spawn successfully <br />in the Gunnison River upstream of Redlands Diversion Dam, leading to a belief that the <br />combination of changed flows and the fish ladder will contribute to increased natural <br />reproduction. <br /> <br />Improving Scientific Understanding of River Systems <br />