1. Assistant Research Engineer, IIHR-Hydroscience and Engineering, Univ. of Iowa, 300 South Riverside Dr., Iowa City, IA 52242-1585.
2. Professor and Research Engineer, IIHR-Hydroscience and Engineering, Univ. of Iowa, 300 South Riverside Dr., Iowa City, IA 52242-1585.
3. Discipline Director—Tunnels, Jordan, Jones and Goulding in a Joint Venture with Hatch Mott MacDonald and Delon Hampton and Associates, 6801 Governors Lake Parkway, Norcross, GA 30071.