Kingsbridge Power House, ca. 1905. Built by the Third Avenue Railway Company, the Kingsbridge Power House provided electricity for the large network of trolleys that traveled through Manhattan. Called the "largest in the world" when it opened in the first years of the 20th century, the power generating station allowed for the replacement of cable-driven trolleys with electric powered street cars. The imposing Romanesque brick building was designed by engineer Isaac A. Hopper and measured 320 long by 250 feet wide. The building served the trolley system through the mid 1920s before its machines were turned off and the building abandoned. The structure was demolished sometime after trolley service was discontinued in 1948.