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 Bridge (1872–1933), a longtime resident and former mayor of Northampton. Coolidge was elected to the State Senate and the governorship of Massachusetts before being elected President of the United States. A bronze memorial plaque of Calvin Coolidge is mounted on the northeast and southwest pylons. The bridge features large, distinctive granite-faced pylons in the Art Deco style, measuring 15 by 27 feet at the base. On the northwest and southeast pylons are bronze doors that provide access to a small room reportedly used as posts for air raid wardens during World War II. In 2001, the Massachusetts Highway Department began a