Arizona: USGS Southwest Biological Science Center, Colorado Plateau Field Station, Northern Arizona University, P.O. Box 5614, Flagstaff, AZ 86011-5614, Principle Investigator: Kathryn Thomas,
Colorado: Colorado Division of Wildlife, Habitat Resources Section, 6060 N. Broadway, Denver, CO 80216, Principle Investigators: Don Schrupp, Lee O'Brien
Nevada: US EPA, National Exposure Research Lab - ESD/LEB, P.O. Box 25047, Las Vegas, NV 89193-3478, Principle Investigators: Bruce Jones, Bill Kepner, David Bradford
Utah: RS/GIS Laboratory, College of Natural Resources, UMC 5275, Utah State University, Logan, UT 84322-5275, Principle Investigators: Doug Ramsey, John Lowry
USGS/Biological Resources Discipline: P.O. Box 30003, MSC 4901, Las Cruces, NM 88003, SWReGAP Project Coordinator: Julie Prior-Magee.