an extreme width of and gross tonnage of 2,420 tons. 1920s through retirement Between 1922 and 1941 Eureka was on the Sausalito commuter run. As the largest of the Northwestern boats, Eureka made the heaviest commuter trips - the 7:30 from Sausalito and the 5:15 from San Francisco. Each trip averaged 2,200 passengers. During this period the upper deck included seating areas, a magazine stand, and a restaurant that served full meals. Eureka was primarily a passenger boat, carrying very few cars. After 1929, though, she sometimes made an extra run from the Hyde Street Pier in San Francisco, carrying autos on Sundays. Completion of the Golden Gate Bridge between San Francisco and Marin in 1937 doomed ferry service. Northwestern Pacific first cut service, then abandoned ferries altogether in 1941. During the war years, Eureka joined a number of bay ferries in the work of transporting troops from Camp Stoneman in Pittsburg, California, up the Sacramento River, to the port of embarkation piers in San Francisco. By the 1950s Eureka served by linking Southern Pacific's cross-country trains, which terminated at Oakland, with San Francisco until 1957, when she snapped an engine crank pin. That service was discontinued the following year. In 1958, Eureka joined the fleet of historic ships now at the National Historical Park. In the late 1990s she was used as a main filming location for the TV-show Nash Bridges. In October 1999, Eureka entered San Francisco Drydock for a $1 million restoration project focusing on the vessel's superstructure—the above-water portions of the vessel. A significant portion of that restoration was the replacement of the boat's "kingposts"—four large wooden structures that support the paddlewheels and upper decks. Design Although a number of large ferryboats survive in the US, Eureka is the only one with a wooden hull. She is one of the most impressive remaining examples of traditional American wooden shipbuilding. Beneath her upperworks, the round-bottomed hull is wide and long. The house rests on a platform extending from the hull on either side. Her walking beam engine was originally powered by coal-fired boilers that were converted to oil in 1905. The engine was built in 1890 by the Fulton Iron Works in San Francisco. Eureka is one of only two surviving vessels equipped with a walking beam engine, alongside the Ticonderoga, and the only one still afloat. With the increased length of , Eureka became the largest