- Inside the hydro-electric power house.
- Inside the hydro-electric power house.
- Inside the hydro-electric power house.
- The Mill City hydro-electric power house.
- The Mill City hydro-electric power house.
- The Mill City hydro-electric power house in 1897.
- Inside the hydro-electric power house.
- The Mill City hydro dam.
- Look out building.
- Electricity is fun!
- Inside the hydro-electric power house.
- Inside the hydro-electric power house.
- 1898 VIEW IN THE HYDRO POWER HOUSE.
- Inside the hydro-electric power house.
- A Woodward hydraulic turbine gate shaft type water wheel governor schematic.