wooden bridge was in poor condition by the early 1900s and was demolished in 1902. A new steel bridge was completed in 1904. This bridge was a five-span Pratt truss, wide and long. It was constructed on the two piers remaining from the previous bridge and two new piers. In 1927, the Armstrong Tunnel was completed, linking the north end of the bridge with Forbes Avenue. Third bridge In 1928, Allegheny County voters approved a $43.7 million bond issue to fund a variety of public works, including the West End Bridge, McKees Rocks Bridge, Saw Mill Run Boulevard, Allegheny River Boulevard, and Allegheny County Airport. Also included was funding to replace the Tenth Street Bridge, which was considered to be unsafe for heavy vehicles even though it was not very old. Ownership of the bridge was also transferred from the city to Allegheny County. The existing bridge was demolished in 1931 by the Vang Construction Company, which was also responsible for building the substructure of the replacement bridge. The new suspension bridge was designed by the office of Allegheny County Chief Engineer Vernon R. Covell, with architectural elements designed by Stanley Roush, and the contract for the superstructure was awarded to the American Bridge Company. The bridge was constructed in 1931–33. After construction of the piers and towers, workers on suspended catwalks began spinning the two diameter steel cables in February, 1932. Each cable was wound from 19 bundles of 256 wires each, for a total of more than of wire in the entire bridge. After this work was complete, the structural steel superstructure and bridge deck were installed. The bridge opened with little fanfare on February 11, 1933. The total cost of the project was about $1.6 million. The Mount Washington Roadway Extension, now the P.J. McArdle Roadway, was completed in September, 1933, providing a highway connection from the south end of the bridge to the Liberty Tunnel and Mount Washington. In addition to road traffic, the bridge was also used by Pittsburgh Railways streetcars on the 53 Carrick route. The line was rerouted to the Smithfield Street Bridge in 1968. By the 1970s, many parts of the bridge had deteriorated, particularly the deck and electrical system. A $1.8 million rehabilitation project was completed in 1978–79, including structural repairs, deck and sidewalk replacement, painting, and removal of the streetcar tracks. The bridge was rehabilitated again in 2017–19 by the