SS President Coolidge Newport News, Virginia built the two ships, completing "President Hoover" in 1930. The keel for "President Coolidge" was laid 22 April 1930 and the ship was delivered 1 October 1931. They were the largest merchant ships built in the United States up to that time. Each ship had turbo-electric transmission, with a pair of steam turbo generators generating current that powered propulsion motors on the propeller shafts. Westinghouse built the turbo generators and propulsion motors for "President Coolidge" but General Electric built the turbo generators and propulsion motors for "President Hoover". In the "President Coolidge" twelve Babcock & Wilcox superheater
Calvin Coolidge House with a hip roof and clapboarded exterior. Stylistically it is basically Colonial Revival, with projecting sections to the rear of each unit, and different porch treatments on each side. The Coolidge unit, on the left, has a gable-roofed porch supported by round columns, extending partly in front of a project polygonal bay window. The interior also has some Colonial Revival features, including a fireplace in the front parlor with flanking Doric pilasters. The house was built in 1900-01 by J.W. O'Brian, and its left side was rented in 1905 by Calvin Coolidge. The Coolidges occupied that unit until 1930. This