Dr. Nelson Ham has been a professor of geology and environmental science at St. Norbert College for 30 years. He earned his Master’s and Ph.D. degrees in geology at UW-Madison, with research on modern glacier processes in Alaska and the origins of Wisconsin’s landscapes. In recent years, he has turned his focus on the geology and environmental history of Wisconsin trout streams, especially the role of the Fur Trade and early logging in modifying stream hydrology with implications for stream restoration. He has led or co-led field trips on the topic for members of the Wisconsin Dept of Natural Resources, the U.S. Forest Service, the U.S. Fish & Wildlife Service, Trout Unlimited, and the Natural Resources Foundation of Wisconsin. He lives in De Pere with his wife and two children on former farmland that has returned to wetlands.