Mammoth Hot Springs, Yellowstone National Park, Wyoming

This hydro-electric project consisted of a new powerhouse containing a Pelton type hydro-electric turbine, induction generator, switchgear, SCADA system, and telemetry system.  An existing raw water pipeline, which supplies water to the existing raw water reservoir and water treatment plant, was diverted to the new powerhouse and connected to the Pelton turbine to generate power.  The turbine runs at a base head and flow of 473 feet and 4.2 cubic feet per second and will generate 170 kW.  The system is projected to produce 1,400,000 kWH of power per year which equates to the power consumed by approximately 170 homes. This hydro-electric generation installation is an ideal application as it is utilizing existing infrastructure to generate power and has no new environmental impacts and will generate a constant source of clean power.  In addition to providing the engineering design and construction drawings, CTA’s electrical engineer assisted the owner with developing the interconnection and power purchase agreements with NorthWestern Energy. Total construction cost for this project was $937,287 which included the utility line extension and new underground fiber and copper telephone and data lines to the existing water treatment plant.