The Alameda Works Shipyard, in Alameda, California, United States, was one of the largest and best equipped shipyards in the country. The only building remaining from the yard is the Union Iron Works Powerhouse, which is listed on the National Register of Historic Places.1956.

Moore Dry Dock Company was a ship repair and shipbuilding company in Oakland, California. In 1905, Robert S. Moore, his brother Joseph A. Moore, and John Thomas Scott purchased the National Iron Works located in the Hunter's Point section of San Francisco, and founded a new company, the Moore & Scott Iron Works Moore had previously been vice president of the Risdon Iron Works of San Francisco. Scott was nephew to Henry T. and Irving M. Scott, owners of the nearby Union Iron Works, where John had risen from apprentice to superintendent. Their new business was soon destroyed by fire resulting from the San Francisco earthquake.