Adams Power Plant Transformer House in Niagara Falls, New York is a National Historic Landmarked building constructed in 1895.

[3] In 1892, George Forbes was hired as a technical consultant and in May 1893 he convinced the company to build a hydroelectric system based on polyphase alternating current.

Westinghouse Electric was subcontracted to build 5,000 horsepower (3,700 kW) 25 Hz[4] AC generators, based on the work of Nikola Tesla and Benjamin G. Lamme, while the I. P. Morris Company of Philadelphia built the turbines based on the design of the Swiss company Faesch and Piccard.

Tailwater from the generators passed into a 7000-ft tailrace tunnel, which conveyed the water beneath the city to the lower river, near the present-day site of the Rainbow Bridge.

There were transformers to step up the voltage to 10,000 volts to serve the medium distance around Niagara Falls areas.