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The Fish 5 Table 1. Major propagation facilities for bonytail and/or razorback sucker that are stocked in the Colorado River Basin. Recent broodstock Facility Agency Bonytail Razorback RZB or BT (#1 Year started' Dexter NFH U.S. Fish and Wildlife Service X BT (2,500) 1981 X RZB (300) 1981 Willow Beach NFH U.S. Fish and Wildlife Service X X RZB (wild)b 1974 Achii Hanyo' U.S. Fish and Wildlife Service X X Grow-out 1998 Ouray NFH U.S. Fish and Wildlife Service X X RZB (660) 1986 Grand Valley Facilityd U.S. Fish and Wildlife Service X RZB (300) 1992 Native FWG' U.S. Bureau of Reclamation X X Wild larvaer 1990 Wahweap SFI-I Utah Division of Natural Resources X X RZB (600)g 1993 Bubbling Ponds Arizona Game and Fish Department X Grow-out 1984 Mumma Colorado Department of Wildlife X X Grow-out 2000 'Started endangered fish propagation. "Spawners taken from Lake Mohave, spawned, and returned. 'Satellite facility of Willow Beach NFH. "Sites included Horsethief Refugia Ponds. 24-Road Hatchery, and Clymer's Pond. 'Panners include the U.S. Fish and Wildlife Service, Arizona Game and Fish Depanment, Arizona State University, National Park Service, U.S. Geological Survey. and Nevada Department of Wildlife. (Wild larvae captured for propagation from Lake Mohave. 'Holds back-up broodstock for Ouray NFH. Recovery Program uses nine grow-out ponds (11.3 ha) located southwest of Farmington, New Mexico, to raise razorback sucker to >30 cm before releasing them into the San Juan River (Ryden, 1997). Wahweap State Fish Hatchery (Wahweap SFH) began raising bony tail and razorback sucker in 1993. While the facil- ity does not spawn fish, it does maintain a back-up broodstock of Green River razorback sucker in case something happens to Fig. 3. Aerial photograph of Ouray National Fish Hatchery located near Vernal, Utah. Photo courtesy of Tom Czapla, U.S. Fish and Wildlife Service. the Ouray NFH broodstock. The facility is located near Blue Water, Utah, and is operated by the Utah Division of Natural Resources (UDNR) (fig. 4). The newest rearing facility is the Mumma or the Native Aquatic Species Restoration Facility (Mumma) located west of Alamosa, Colorado, operated by the Colorado Division of Wildlife (CDOW). The hatchery opened in 2000 and has raised both bony tail and razorback sucker from fish obtained Fig. 4. Aerial view of Wahweap State Fish Hatchery located near Blue Water, Utah. Photo courtesy of Quent Bradwisch, Utah Department of National Resources.