In 1911 the SP started electrifying its local train service in the East Bay (San Francisco Bay Area). The Oakland 7th St. line was extended to Dutton Ave. in San Leandro and carried the most passengers of any line in the system. In 1939, under the subsidiary company, Interurban Electric Railway (IER) the line was rerouted over the San Francisco-Oakland Bay Bridge into the San Francisco Transbay Terminal. IER service on the 7th St. line was abandoned in March, 1941, but the track on 7th St. from Broadway to Pine St. was put back in service (1943–1946) during World War II to enable streetcars of the Key System to reach several military installations. Ferryboats The first ferryboat used by the SF&O, the leased Contra Costa, had previously been in service from San Francisco to the foot of Broadway. The lease ended in 1864 and the SF&O purchased the ferryboat Louise to replace it. With the extended railroad line, traffic increased considerably and the Louise was soon inadequate for regular service. The larger river packet Washoe, having been damaged in an explosion, was purchased, extensively rebuilt as a ferryboat, and placed in service. In 1868, the Central Pacific Railroad controlled the SF&O and anticipated much increased traffic when the transcontinental railroad was completed to Oakland. They ordered a new even larger ferryboat, the El Capitan, from a new shipyard at Oakland Point, and placed it in service. Locomotives The SF&O originally purchased a small, unnamed, 2-2-0 type locomotive and a larger 4-4-4 type tank locomotive named the Liberty. In 1863, needing another locomotive, the SF&O purchased a 2-2-4 type combination locomotive and express car from a line in San Francisco. It was unnamed, but was unofficially called Old Betsy. By 1869, a more powerful locomotive was needed to pull longer trains, so a new 4-4-0 type locomotive was ordered and named the Oakland. With the SF&O merged into the Central Pacific Railroad in 1870, the former SF&O locomotives were sent to various other locations on the CP system and CP locomotives were brought in to pull the local trains on 7th St. References See also Oakland Long Wharf Oakland Point San Francisco and Alameda Railroad San Francisco and San Jose Railroad Notes Defunct California railroads Passenger rail transportation in California Predecessors of the Southern Pacific Transportation Company Public transportation in Alameda County, California Rail transportation in Oakland, California History of Oakland,