1. Emeritus Professor, Dept. of Civil and Environmental Engineering, The Univ. of Michigan, 710 S. Manitou Trail, Lake Leelanau, MI 49653 (corresponding author).
2. Senior Engineer, LimnoTech, Inc., 501 Avis Dr., Ann Arbor, MI 4818.
3. President, Platte Lake Improvement Association, Inc., 28991 Glenbrook, Farmington Hills, MI 48331.
4. Fish Production Manager, Michigan Dept. of Natural Resources-Fisheries Div., P.O. Box 30446, Lansing, MI 48909.