Ludington's lakeshore plant works like a giant battery

Drive south of Ludington along the lakeshore and you will spot something strange on the bluff: a huge, flat-topped reservoir above Lake Michigan. That is the upper half of the Ludington Pumped Storage Plant, the place many longtime locals simply call “the Project.” Consumers Energy says construction began in 1969 and operation started in 1972.

It works like an enormous battery, though the stored energy is water rather than chemistry. When electricity is available and demand is lower, six reversible pump-turbines push Lake Michigan water uphill. When the grid needs more power, the plant releases that water 363 feet back toward the lake and the same machines generate electricity. In other words, the plant uses electricity to store water high up, then turns that stored position back into electricity later.

The scale is hard to picture from the road. Consumers says the 840-acre reservoir is more than 100 feet deep and can hold 27 billion gallons. The plant’s capacity is 2,292 megawatts. The company’s comparison is that it can power a city with a population of about 1.4 million people for roughly eight hours. That does not mean 1.4 million homes.

Consumers also says Ludington was the world’s largest pumped-storage facility when it opened and remains one of the largest U.S. hydroelectric plants by capacity. Those are the operator’s comparisons, not a separate world-record certification, so it is worth keeping the attribution attached.

You can see more than the roadside profile. Consumers lists an Upper Reservoir Observation Platform and a Lake Michigan Overlook among the project’s formal recreation facilities. Those viewing areas are the public destination; the power plant itself is not presented as a public tour.