1. Minnesota Pollution Control Agency, 525 South Lake Avenue, Suite 400, Duluth, MN
2. Ontario Ministry of the Environment and Climate Change, 1026 Bellwood Acres Road, Dorset, ON P0A 1E0, Canada
3. Natural Resources Research Institute, University of Minnesota Duluth, 5013 Miller Trunk Highway, Duluth, MN
4. St. Croix Watershed Research Station, Science Museum of Minnesota, 16910 152nd St. North, Marine on the St. Croix, MN
5. Paleoecological Environmental Assessment and Research Laboratory, Department of Biology, Queen's University, 116 Barrie Street, Kingston, ON K7L 3N6, Canada