1. US Geological Survey, Great Lakes Science Center, Lake Michigan Ecological Research Station1574 N 300 EastChestertonIN46304
2. Dep. of Civil & Environmental EngineeringMichigan State Univ.East LansingMI48824
3. US Geological Survey, Ohio–Kentucky–Indiana Water Science CenterIndianapolisIN46278
4. US Geological Survey, Central Midwest Water Science CenterUrbanaIL61801