1. Hydraulic Engineer, U.S. Bureau of Reclamation, Denver Federal Center, Bldg. 67, P.O. Box 25007 (86-68540), Denver, CO 80225-0007. E-mail: bgreimann@do.usbr.gov
2. Hydraulic Engineer, U.S. Bureau of Reclamation, Denver Federal Center, Bldg. 67, P.O. Box 25007 (86-68540), Denver, CO 80225-0007.
3. Research Engineer, Civil and Environmental Engineering, Colorado State Univ., Fort Collins, CO, 80523-1372.