In 1984, Janesville resident, Matti Ripatti and California Hydro Systems recognized the geothermal potential of the Amedee Hot Springs. They applied to the Lassen County Planning Department for a permit to construct a geothermal plant there. The permit was granted and in 1988 the power plant was constructed. Ripatti had a 25 year lease to the site and springs with the Humphrey family, owners of the property. The plant is currently operated by Amedee Geothermal Ventures.

Tim