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 State Forest hardwood and often steep, and are actively managed for timber. The West section features many hiking trails, including the Shrewsbury Peak Trail, Tinker Brook Trail, Bucklin Trail and portions of the Long Trail and Appalachian Trail. There are trails for snowmobiling and cross-country skiing, as well as snowshoeing. Hunting, fishing and trapping occurs in this section. The West section of Calvin Coolidge State Forest is located along the Green Mountains ridgeline and features many high forested mountain peaks, including Killington Peak, Little Killington, Shrewsbury, Saltash, Mendon and Smith peaks. There are three designated Vermont State Natural Areas – Tinker Brook