10/31/2026
At the Bisbee Mill Museum, our grist mill did not have a traditional water wheel. Instead, we have a vertical axis water turbine. This turbine was designed by John B. McCormick and built in Holyoke, Massachusetts. His turbine is about 80% efficient and the same basic design is still in use at hydroelectric plants.
This turbine took water from the canal , through a penstock into the impeller before returning to the river through the tailrace. This turbine ran the gristmill as well as several belt driven pieces of equipment in the museum. Due to a collapse of the canal behind the museum, our turbine is non-operational.