Ātiamuri, like all of the hydroelectric power stations on the Waikato River, is operated by state-owned electricity generator Mercury Energy.

The village of Ātiamuri contained 500 homes, a cinema, recreation room, canteen and library.

Construction of Ātiamuri was completed six months ahead of schedule, and the first three turbines and generators were commissioned in November 1958.

The outlet works is a 129-metre (423 ft) long diversion tunnel, that is used to release water from the lake when required.

[3] Each of the turbines turns a generator, each producing 21 megawatts (28,000 hp) of electricity at 11,000 volts.

The station connects to the single-circuit Wairakei to Whakamaru A line (WRK-WKM-A) at the substation to the south of the powerhouse, with electricity being distributed to Taupō and the southern Waikato, and further north to Hamilton and Auckland.