- James Leffel's tombstone.
- James Leffel's tombstone.
- James Leffel's tombstone showing his patented turbine water wheel.
- Rest in peace James Leffel.
- Wisconsin Hydroelectric Power History.
- Wisconsin Hydroelectric Power History.
- Wisconsin Hydroelectric Power History.
- The Volcan Street Hydo Plant.
- The Volcan Street Hydo Plant.
- The Volcan Street Hydo Plant showing the original James Leffel turbine water wheel.
- The Volcan Street Hydo Plant.
- The Volcan Street Hydo Plant History.
- The Volcan Street Hydo Plant showing the original James Leffel turbine water wheel.
- The Volcan Street Hydo Plant showing the original James Leffel turbine water wheel.
- The Volcan Street Hydo Plant History.