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E. Structural Needs (minimum) l.a Earthen ponds: [25] one acre ponds; [10] 0.2-0.5 acre earthen ponds, and [6] raceways for pond culture. b ,or [10] 5'x60'[5] 8'x80 raceways; and [10] 0.2-0.5 acre earthen ponds for raceway culture. 2. Holding house-[16] tanks, and laboratory 3. Administration building; office, crew room, visitor center 4. Three stall garage and shop building. 5. Residences [4]. 5. Roadways and drives. A list of potential sites was developed of: 1) hatcheries that are culturing or have cultured one or more Colorado River endangered fish species, 2) sites with promising water supplies that exist in the UCRB where these fishes occur and 3) sites with good water supplies outside the UCRB. One or more fact-finding visits were made to most of the sites to become acquainted with the personnel, facilities and operation of the station and to extract pertinent data from the station's files, such as water rights, water quality analyses, station plans, maps etc. Also, Master Plans or Station Guides were consulted. Photographs were taken of the more prominent features of the station for the record and for future reference. Sites were evalauated and compared on their potential ability to match the site selection criteria, although river locations in the UCRB, where these fishes still occur, were given added weight (for rationale see Appendix 2). A thorough on-site engineering evaluation is still needed for undeveloped hatchery sites. Several federal and state hatcheries that have reared Colorado squawfish, humpback chub, and bony tail chub in the past were considered as potential hatchery sites, i.e. Willow Beach NFH, Arizona; Hotchkiss NFH, Colorado; Dexter NFH, New Mexico; Logan FES, Utah and Page Springs SFH, Arizona. All but two of these hatcheries, Dexter NFH and Logan FES, are in the Colorado River drainage. One state fish hatchery, two Federal waterfowl refuges, and one site on rndian land were considered because of their ample water supplies and location in the UCRB. Colorado's Rifle Falls SFH was to become a Colorado squawfish rearing station until the plan was killed by the state legislature in 1979. It was considered in this feasibility study. In addition, Ouray National Wildlife Refuge (NWR), Utah and Brown's Park NWR, Colorado, have water and land on the Green River, which qualified them as potential candidates. Big Springs, located on the Uintah Indian Reservation in Utah is included because it is in the Green River drainage and is known for its fish-out ponds for trout, which are fed by substantial spring flows. It was once considered as a potential site for what is now Jones Hole NFH. 19