SS Cotopaxi was an Emergency Fleet Corporation (EFC) Design 1060 bulk carrier built for the United States Shipping Board (USSB) under the World War I emergency shipbuilding program. The ship, launched 15 November 1918, was named after the Cotopaxi stratovolcano of Ecuador. The ship arrived in Boston, 22 December 1918, to begin operations for the USSB, through 23 December 1919, when Cotopaxi was delivered to the Clinchfield Navigation Company under terms of sale.
During operation for the USSB the ship suffered serious damage in a grounding on the coast of Brazil, and later, operating for Clinchfield Navigation, was involved in a collision with a tug in Havana, Cuba, resulting in the tug being sunk. She and a crew of thirty-two vanished in December 1925, while en route from Charleston, South Carolina, to Havana, with a cargo of coal.
The wreck was discovered in the 1980s, but not identified until January 2020.
Cotopaxi was one of seventeen EFC Design 1060, steam-powered "Laker" type bulk carrier ships built for the USSB by the Great Lakes Engineering Works (GLEW), River Rouge Yard, Ecorse, Michigan, as hull number 209. The design was unique to GLEW[1] with deckhouse and engines aft (a design commonly termed a "Stemwinder") with four cargo hatches forward served by two masts.[2] [3]