Rio Vista Bridge

Less than thirty years after being completed, the eastern timber trestles of the 1919 bridge were in poor condition, and construction of replacement steel trusses began in 1943.[3] Construction of the 1,300-foot (400 m) eastern steel truss section, consisting of seven 180-foot (55 m) truss spans, was completed in 1945 at a cost of US$730,000 (equivalent to $11,870,000 in 2022), and traffic was diverted from the timber trestles onto the steel trusses with a crossover.[2] The US Corps of Engineers authorized replacement of the remaining portion of the bridge on 2 February 1950,[2] with contracts awarded for US$960,000 (equivalent to $9,500,000 in 2022) to Lord and Bishop for the substructure and US$2,410,000 (equivalent to $23,840,000 in 2022) to Judson Pacific Murphy for the superstructure, with an additional US$124,000 (equivalent to $1,230,000 in 2022) contract to Pacific Murphy for the concrete slab approach spans.

The substructure was constructed from 4 April 1957 through 30 October 1958, and consists of the concrete piers and pilings. The first part of the superstructure erected was the east tower, which began on 4 December 1958. The superstructure was assembled in prefabricated segments at Pacific Murphy's Richmond yard and barged upstream to the construction site, where they were raised into place by a 100-short-ton (91 t) capacity barge crane. The sheaves at the top of each tower were lifted in place during high tides in order to reach the necessary height.[2] The 1960 superstructure replacing the 1919 bascule bridge includes the four truss spans west of the main lift span and one truss span east of the main lift.

The construction of the bridge overlapped the planning process for the Sacramento Deep Water Ship Channel. When plans for the Deep Water Channel were complete, the eastern truss section of the new bridge were already complete, and the Channel rerouted ship traffic from its then-current course near the western bank (through the 1919 bascule) to a point 575 feet (175 m) east. A new crossover from the 1919 bascule bridge to the 1945 steel truss spans was built to avoid interference with substructure construction, and after the new lift portion was built, another crossover was built to reroute road traffic from the 1919 bascule to the 1960 bridge. Once the new bridge was complete, removal of the old structure was completed by July 1960.[2]

On 15 January 1967, the Italian freighter Ilice missed the raised draw while underway in heavy fog and crashed into the bridge just east of the draw, destroying an entire 144-foot (44 m), 400-short-ton (360 t)) truss span.[10] No one was injured in the crash, although two youths who were stopped on the bridge while the freighter passed were tossed into the river and were subsequently rescued. Once Ilice was freed from the wreckage, she proceeded upriver to Sacramento to take on its scheduled load of rice. The remnants of the destroyed span were cut free from the bridge and dropped into the water. A temporary repair consisting of a steel trestle and two 72-foot (22 m) steel girders was erected after three weeks, with a ferry carrying traffic across the river while the temporary span was erected.

The Marine Boss crane barge, built for the heavy girder lifts during the construction of the 1967 San Mateo Bridge, erected a permanent 370-short-ton (340 t) replacement span (which included a 36-foot (11 m) cantilevered section to replace damage in the adjacent truss span) in June 1967[11] and removed both the wreckage from the original bridge and the temporary span at the same time.

In 1998, the Rio Vista Bridge was officially designated the Helen Madere Memorial Bridge after Helen Madere, a former vice-mayor of Rio Vista who served as that city's representative to the Solano Transportation Authority. The legislative act also cited her instrumental role in improving driver safety on California State Route 12.[1]

The bridge was raised to allow marine traffic to pass on July 7, 2012, and became stuck in that position for several hours due to a mechanical failure.[12]

On August 9, 2018, the bridge again became stuck open[13] for ten hours,[14] until work crews were able to manually lower the draw.[15] Marine traffic has the right-of-way, and the nearest detour around the bridge requires an additional 80 miles (130 km) of driving.[16]

It was unable to be raised again until August 16, blocking marine shipments of rice and cement to the Port of West Sacramento. Caltrans made plans to manually raise and test the draw section after determining the motor gear box had failed, but warned motorists that repairs would take up to thirty days to complete,[15] as the gearbox would need to be rebuilt in Alabama. The bridge was raised by hand, closing to road traffic overnight every few days to allow marine traffic to pass.[17] Repairs to the bridge were completed on September 14.[18]

Caltrans is undertaking a two-part preservation project for the bridge. The first part of this work, which involves cleaning and painting the bridge, is expected to complete in winter 2020 at a cost of $37.1 million. After the bridge has been repainted, the mechanical and electrical systems will be upgraded, starting in spring 2022, at an anticipated cost to range between $11.9 and $19.2 million.[25]