IRT Powerhouse

The IRT Powerhouse, also known as the Interborough Rapid Transit Company Powerhouse, is a former power station of the Interborough Rapid Transit Company (IRT), which operated the New York City Subway's first line. The building fills a block bounded by 58th Street, 59th Street, Eleventh Avenue, and Twelfth Avenue in the Hell's Kitchen and Riverside South neighborhoods of Manhattan.

The IRT Powerhouse was designed in the Renaissance Revival style by Stanford White, an architect working with the firm McKim, Mead & White, and was intended to serve as an aboveground focal point for the IRT. The facade is made of granite, brick, and terracotta, incorporating extensive ornamentation. The interiors were designed by engineers John van Vleck, Lewis B. Stillwell, and S. L. F. Deyo. At its peak, the powerhouse could generate more than 100,000 horsepower (75,000 kW).

The land was acquired in late 1901, and the structure was constructed from 1902 to 1905. Several changes were made to the facility throughout the early and mid-20th century, and an annex to the west was completed in 1950. The New York City Board of Transportation took over operation of the powerhouse when it acquired the IRT in 1940. The building continued to supply power to the subway system until 1959, when Consolidated Edison repurposed the building as part of the New York City steam system. The New York City Landmarks Preservation Commission designated the powerhouse as a city landmark in 2017, after several decades of attempts to grant landmark status to the building.