1. U.S. Bureau of Reclamation, Denver Federal Center, Bldg. 67, P.O. Box 25007 (D-8540), Denver, CO 80225-0007.
2. Visiting Hydraulic Engineer, Sedimentation and River Hydraulics Group, Technical Service Center, Bureau of Reclamation, Denver, CO 80225; and, Research Scientist, Dept. of Civil Engineering, Colorado State Univ., Fort Collins, CO 80523.