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Table 1. List of interviewees Name Agency/affiliation Date interviewed Phone/ in person Dan Beyers Colorado State University 6/29/99 Phone Donal O'Toole University of Wyoming 6/4/99 Phone Merl Raisbeck University of Wyoming 7/2/99 Phone Richard Krueger U.S. Fish and Wildlife Service/ 6/25/99, 6/29/99 In person Grand Junction, Colorado Barbara Osmundson U.S. Fish and Wildlife Service/ 6/25/99 In person Grand Junction, Colorado Pat Arbeiter Bureau of Reclamation/ 6/29/99 Phone Grand Junction, Colorado George Kidd Northwest Fisheries/ 5/25/99 In person Grand Junction, Colorado A. Dennis Lemly U.S. Forest Service/ 8/17/99 Phone Blacksburg, Virginia Ralph Seiler U.S. Geological Survey/ 6/26/99 Phone California Kathy Holley U.S. Fish and Wildlife Service/ 5/25/99 In person Grand Junction, Colorado Tim Modde U.S. Fish and Wildlife Service/ 7/2/99 Phone Vernal, Utah Frank Pfeiffer U.S. Fish and Wildlife Service/ 9/22/99 Phone Grand Junction, Colorado Steve Hamilton U.S. Geological Service/ 6/18/99 Phone Yankton, South Dakota 1.3 Area of Study The Upper Colorado Basin is shown in Fig. 1. While a larger area is shown, this report emphasizes findings in the Grand Valley, that reach of the Colorado River that flows through Grand Junction, Colorado, and the adjacent communities of Palisade, Loma, and Mack. 1.4 The Endangered Fish The fish species of principal interest in the upper basin are the Colorado pikeminnow (formerly squawfish) and the razorback sucker. Most of the emphasis has been on the razorback sucker because the pikeminnow is still reproducing and recruiting to the adult population. Two other endangered species of concern in the Colorado River are the humpback chub and bonytail. All of the discussion in this report, however, relates to the razorback sucker (often called a humpback sucker by fishermen) and the Colorado pikeminnow or squawfish.