1. U.S. Geological Survey, Eastern Energy Resources Science Center, 12201 Sunrise Valley Dr., MS956, Reston, Virginia 20192 United States
2. Ohio University, Institute for Sustainable Energy and the Environment, 259 Stocker Center, Athens, Ohio 45701, United States
3. U.S. Geological Survey, Upper Midwest Water Science Center 5840 Enterprise Drive Lansing, Lansing, Michigan 48911, United States
4. U.S. Geological Survey, Ohio-Kentucky-Indiana Water Science Center, 6460 Busch Blvd. Ste. 100, Columbus, Ohio 43229, United States