1. Associate Member, ASCE
2. Member, ASCE
3. Hyraulic Engr., U.S. Bureau of Reclamation, Denver Fed. Ctr., Build. 67, P.O. Box 25007 (D-8540), Denver, CO 80225-0007. E-mail: bgreimann@do.usbr.gov
4. Prof., Iowa Inst. of Hydr. Res., Univ. of Iowa, Iowa City, IA 52242.