1. Hydraulic Engineer, Bureau of Reclamation, Technical Service Center, P.O. Box 25007, Denver, CO 80225 (corresponding author).
2. Area Manager, Bureau of Reclamation, Boulder Canyon Operations Office, P.O. Box 61470, Boulder City, NV 89006.
3. Director, Center for Advanced Decision Support for Water and Environmental Systems, Campus Box 421, Boulder, CO 80309.
4. Research Hydrologist, US Geological Survey, National Research Program, P.O. Box 25046, Denver, CO 80225.
5. Hydrologist, US Geological Survey, Headquarters, 12201 Sunrise Valley Dr., Reston, VA 20192.