History. Alma is a flat-bottomed scow schooner built in 1891 by Fred Siemer at his shipyard at Hunters Point in San Francisco.Like the many other local scow schooners of that time, she was designed to haul goods on and around San Francisco Bay, but now hauls people.Able to navigate the shallow creeks and sloughs of the Sacramento and San Joaquin River Delta, the scows’ strong, sturdy hulls …