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species that are likely to be found in the project area include the Colorado squawfish, razorback sucker, American peregrine falcon, bald eagle, and Southwestern willow flycatcher. None of the Federally-listed threatened or endangered mammals or plants are known to occur in the project area. The proposed control of nonnative fish species is related to the recovery of the Colorado squawfish and razorback sucker in the Upper Colorado River Basin. Information on birds occurring in the project area were obtained from lists by Andrews and Righter (1992), a 1995 list by the Colorado Natural Heritage Program, and an undated but relatively recent Bird Check List for Mesa County, Colorado (Appendix A). The American peregrine falcon is a rare migrant that can inhabit the riparian zone. The Grand Valley Audubon Society reported in 1987 that the bald eagle is an unusual but regular winter visitor that occasionally perches in large cottonwood trees in the riparian zone of the Upper Colorado and Gunnison rivers. The interior least -- tern is a very rare migrant using open water areas of the Grand Valley. The Southwestern willow flycatcher inhabits the riparian zone and forages over _ open land habitats. This flycatcher was reported to breed in the Grand Valley. E. Historic and Cultural Resources. The Ute Indians inhabited the Grand Valley prior to 1881 and Mesa County was part of the Ute Reservation established by a 1868 treaty (Mesa County Planning Commission 1996). The Utes were moved to Utah in 1881 -- allowing white settlers to homestead in the Grand Valley. Various artifacts from the Ute Indians still remain in the Grand Valley. Native American Indians no doubt inhabited or used floodplains along the Upper Colorado and Gunnison rivers. Some areas where floodplain ponds occur of the Colorado and Gunnison rivers have been drastically altered through gravel mining operations so that any artifacts that may have been present are more than likely either buried or were removed with the gravel. F. Socio-Economic Factors. Gravel mining is the major commercial economic factor in floodplain areas. where ponds occur. Mining constituted about 1% of the jobs by industry in Mesa County in 1996 and was one of the highest paying occupations in the area with an average annual wage of about $36 thousand (Grand Junction Area Chamber of Commerce 1997). Presently, some recreational fishing and hunting occurs in floodplain ponds along the Colorado and Gunnison rivers. Most of the recreational fishing in these ponds is for nonnative warmwater fish species. However, some ponds (e.g., Corn Lake) are presently stocked with large numbers of rainbow trout that test positive for whirling disease and are sought by many anglers. The 1991 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation - Colorado documented that 96.4% of 778,300 Colorado anglers fished for salmonids and devoted 80.7% of nearly 6.3 million angler-days to recreational fishing for salmonids (U.S. Department of the Interior, Fish and Wildlife Service and U.S. Department of Commerce, Bureau of the Census 1993b). Few Colorado anglers in the Upper Colorado River actively participate in warmwater fishing although opportunities are available to them. Surveys in 1991 estimated that 10,000 to 13,000 anglers fished approximately 66,000 days for warmwater fish species in the Northwest Region 12