Eureka is a side-wheel paddle steamboat, built in 1890, which is now preserved at the San Francisco Maritime National Historical Park in San Francisco, California. Originally named Ukiah to commemorate the railway's recent extension into the City of Ukiah, the boat was built by the San Francisco and North Pacific Railroad Company at their Tiburon yard. Eureka has been designated a National Historic Landmark and was listed in the National Register of Historic Places on April 24, 1973. She is the largest existing wooden ship in the world. Construction and design Ukiah, a wooden-hulled, double-ended ferryboat, was built in 1890 by the San Francisco and North Pacific Railroad Company at their Tiburon shipyard. She had a length at the waterline of ( overall), beam of — over guards—and hold depth of . Her original gross tonnage was 2,564 and net tonnage, 2,018 tons. The ship had a crew of sixteen, whose quarters were in the hold. According to the National Register of Historic Places, Ukiah was originally built with a main deck for railroad cars and a second deck for passengers above. Numerous contemporaneous newspaper reports, however, state that both the passenger accommodations and railroad cars were located on the main deck. A broad stairway led from this deck to the promenade deck above, where the fore and aft pilot houses, along with staterooms for the officers, were located. Rising from the promenade deck were also several smaller decks for sightseers, accessible only by ladder. Two standard-gauge railway tracks, on which the railroad cars were transported, were installed the length of the main deck through the center of the ship. Passenger accommodations were located on either side, fore and aft of the paddleboxes, with one side of the ship reserved for female passengers and the other for males. The female side included a moveable partition around the paddlebox that allowed passengers to move between cabins in privacy; this partition could be folded up to make room for railroad cars when required. The passenger decorations on each side differed, with the men's featuring grained panelling, and the women's, "parti colors, with gilt moldings and beadings". Floors on the ladies' side featured velvet carpets, while oilcloths sufficed for the men. At each end of the passenger quarters were vestibules, fitted with doors to prevent drafts. Seats throughout were built of semi-circular strips of cedar and black walnut, separated by black walnut arms.