Earlier Pennsylvanians rarely passed up an opportunity to dam a river, creek or stream. Now, with thousands of dams across the state--including nearly 800 at risk of failing-Pennsylvania leads the nation in dam removal. It was the opportunity to make money grinding grain or making paper that gave rise to many dams. Now, it's liability and the risk of law suits that's bringing many of them down. We talk with Dennis Dickey about about dam safety and removal. In the second part of our program we speak with Kim Steiner, Director of the Arboretum at Penn State. He's part of a team working with the American Chestnut Foundation to restore this stately tree to its native range in the Eastern United States. Guests: Dennis Dickey & Kim Steiner