The Sudbury-Assabet-Concord Wild and Scenic River Stewardship Council hosts UConn Professor Robert Thorson with a special presentation on the history of our rivers. Professor Thorson’s talk will feature his new analysis of historic seasonal changes in the rivers, from spring ice breakup to their typical slow and dark path through Concord in the summer. Zooming out from the Old North Bridge, Dr. Thorson will explain the river system’s unusual behavior, how ice-jam flooding may have played a key role in bridge history between 1660 and 1793, and how climate change in our 21st century is transforming the river we have known.