The San Mateo–Hayward Bridge (commonly called the San Mateo Bridge) is a bridge crossing the U.S. State of California"s san Francisco Bay. It provides a connect of the mountain Francisco Peninsula through the eastern Bay. The bridge"s west finish is in Foster City, a suburb on the eastern edge of san Mateo. The east end the the bridge is in Hayward. That is the longest bridge in California and also the 25th longest in the world. The leg is own by the state of California, and also is maintained by Caltrans, the state highway agency. Additional oversight is detailed by the only Area toy fee Authority.
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The leg is component of State route 92, who western terminus is in ~ the town of fifty percent Moon bay on the Pacific coast. It links Interstate 880 in the eastern Bay through U.S. Route 101 on the Peninsula. It is roughly parallel to and lies in between the mountain Francisco–Oakland bay Bridge and also the Dumbarton Bridge, and also is occasionally used through commuters to protect against traffic delays because of emergencies top top those bridges.
History and also descriptionUpgrades and also repairs
History and also description
1929 original bridge
The san Francisco bay Toll-Bridge agency issued US$4,500,000 ($55,200,000 in 2021) in bonds to raise a portion of the approximated US$7,500,000 ($92,000,000 in 2021) budget plan required to build the very first bridge. First-year operating earnings were suspect to be US$868,469 ($10,659,000 in 2021), yet the original bridge lost money in its first year the operation.
1967 orthotropic bridge
By that time, front phases of the job had already been awarded to relocate the toll fee plaza from mountain Mateo to Hayward on new fill and also bids to be taken because that the new eastern trestle, through trestle building awarded come Peter Kiewit Sons". The perfect single-deck design was not finalized until January 1962, with job-related initially approximated to finish in 1965.
The new span won two prizes in 1968: an ASCE compensation for superior Civil Engineering accomplishment and an American academy of Steel building and construction long-span prize bridge award.
William Stephen Allen was retained as an architecture consultant, return the bridge was designed by the bay Toll Crossings department (under Chief technician Norman C. Raab) the the California room of publicly Works. Chuck Seim, among the design engineers functioning for only Toll Crossings, would later credit Allan Temko"s criticism that Raab"s economical truss design for the Richmond–San Rafael crossing because that generating sufficient public press to drive the single-deck design. Temko"s post quoted T.Y. Lin together being against a repeat of the Richmond–San Rafael design, however Lin eventually gave Temko the credit transaction for the design. Raab retired and also his successor, E.R. "Mike" Foley, was willing to combine aesthetic considerations, causing the final design. The western highrise span features an all-steel superstructure, with an orthotropic deck over 2 parallel box girders, adhering to the building of several smaller check bridges utilizing the very same orthotropic deck technology. It to be the an initial large-scale usage of an orthotropic deck, i beg your pardon reduces weight, and thus seismic loading, return the leg is expected to receive moderate to major damage adhering to an earthquake.
Murphy Pacific Marine built the naval Boss floating barge-crane in 1966 with a 500-short-ton (454 t) volume to perform the heavy box girder and deck-section lifts. The hefty lift capacity of marine Boss enabled Murphy Pacific to raise much much longer prefabricated girders 보다 existing barge cranes would have actually allowed. Box girder and deck sections to be fabricated in Murphy Pacific"s Richmond yard and also were carried by marine Boss to the bridge building and construction site. Maritime Boss was offered for scrap in 1988 to Weeks naval in brand-new Jersey, who renamed it the weeks 533 and refurbished it. Mainly 533 has since been used for several notable hefty lifts, including moving the Concorde and also Enterprise onto the Intrepid Sea, wait & space Museum and lifting the downed hull of united state Airways flight 1549 native the Hudson River.
The complete length that the bridge is 7 miles (11.3 km), which is comprised of a western 1.9-mile (3.1 km) highrise section and an east 5.1 mile (8.2 km) trestle section. 425,000 cubic yards (324,936 m3) of to fill were used at the Hayward end to reclaim land because that placing the toll plaza and also administrative buildings. The east trestle span was built on 4,840 prestressed hollow concrete piles, each 60–90 feet (18–27 m) long. The contractor constructed a casting yard in Richmond to create the concrete piles continuously. The brand-new eastern trestle expectancy was completed in 1963 and also traffic over the present 1929 leg was relocated over come it.
Work on the west highrise span was bid in October 1964 and also commenced in 1965. It the cross a shipping channel, through an orthotropic main expectations that is 750 feet (229 m) lengthy (at the time, the longest girder span in the unified States) and has a vertical clearance of 135 feet (41 m). The main expectations is flanked by 2 orthotropic earlier spans which space each 375 feet (114 m) long, and there are seven orthotropic next spans on the strategy to each earlier span. Each of these side spans are 292 feet (89 m) long. Although these spans appear to be created from continuous box girders, castle consist of alternate anchor spans and also suspended spans. Anchor spans remainder on height of two adjacent piers and also cantilever over each next slightly, and also suspended spans room hung between the ends of two surrounding anchor spans. There are second nine 208-foot (63 m) steel spans carrying a concrete deck top top the san Mateo next of the highrise, and ten steel spans carrying a concrete deck top top the Hayward side, varying from 186–208 feet (57–63 m). The bridge carries around 93,000 cars and other vehicles on a common day, almost twin its initial projected design capacity of 50,000 vehicles every day.
The stole deck the the bridge, approximately 418,000 square feet (38,833 m2), was led with an epoxy asphalt concrete wearing surface in 2 layers. The mountain Mateo bridge was the first deployment of one epoxy asphalt concrete wearing surface. As of 2005
The highrise ar was initially constructed with six lanes and the east causeway with four lanes (two in every direction). The causeway ar was a perennial website traffic bottleneck till it was expanded to 6 lanes in 2002, in addition to much needed renovations in its relations with federal government 880 in Hayward.
Bus business over the leg is listed by AC Transit"s heat M Transbay service.
High-voltage strength lines developed by PG&E in the 1950s parallel the leg all the means across the bay. They carry out power to the peninsula and San Francisco.
Upgrades and also repairsSeismic upgrades (1997–2000)Widening (2002–2003)
The bridge was taken into consideration the worst night commute in the just Area, which ended with the perfect of a brand-new eastern trestle delivering westbound bridge website traffic in 2002. Eastbound bridge traffic took over the old trestle completely, back eastbound traffic was not expanded to 3 lanes until February 2003. Sponsor as component of BATA"s local Measure (RM) 1 program, which raised bridge tolls, the brand-new low-rise trestle portion of the bridge included 10 feet (3.0 m) shoulders top top both political parties in both directions and effectively widened web traffic from four to 6 lanes, equivalent the configuration of the high-rise portion of the bridge. Through the completion of the brand-new westbound trestle, the rate limit on the leg was increased to 65 miles every hour (105 km/h).Seismic beam (2010–2012)
A beam, which had actually been added as component of the seismic retrofit project, was discovered in a cracked problem during a regimen inspection in October 2010. The beam, which was on the westbound approach to (east of) the highrise section, was patched with a steel plate together an emergency repair, and permanent repairs, requiring a weekend shutdown, were completed 2 years later.Repaving (2015)
After virtually forty years of organization from the initial orthotropic deck attract surface, Myers and Sons Construction, a partnership between C. C. Myers and also Sterling building and construction Company, to be the selected bidder to remove and also replace the wearing surface on the highrise portion in 2015. The work required two full weekend closures on might 8–11, 2015 and May 22–25, 2015. The brand-new polyester concrete attract surface, developed by Caltrans and also used to an excellent success in various other Bay Area bridges, is suspect to it is in at least as sturdy as the original epoxy asphalt concrete, according to activities tests.
The leg was closed come traffic, because that the first time since opening, starting at 10pm top top Friday, may 8, 2015, because that resurfacing and also maintenance. The bridge reopened prior to 4am top top Monday, might 11, 2015. It closed again for the final phase over Memorial work weekend, might 22–25, 2015, fully reopening through 4:55am on might 25.
After the new bridge was built, the old bridge was demolished however the western method (the trestle expectations up to the original truss spans) to be purchased by the county of mountain Mateo in 1968 for the nominal amount of US$10 ($60 in 2021) and retained together the 4,055 feet (1,236 m) Werder Fishing Pier, which was well-known as one of the finest places to capture sharks in mountain Francisco Bay. San Mateo County operated Werder Pier under a lease covenant with Caltrans, which declared that Caltrans might temporarily revoke the lease in stimulate to perform use the pier together a staging area for repairs come the 1967 span, and also that san Mateo ar must keep the pier and also keep it open up for public usage for twenty-five years.
Werder Pier to be closed to the general public in 1996, once Caltrans offered it as an devices staging area because that the seismic retrofit the the 1967 span. In addition, there were liability concerns due to the fact that the pier"s structure had degraded due to exposure to maritime elements. A report was prepared for the ar in 2004; the expense of rehabilitating the pier and providing some enhancements was estimated at approximately US$7,200,000 ($8,100,000 in 2021), depending on a much more detailed evaluation of the pier"s condition, since the investigation for the report revealed countless cracks, spalls and exposed reinforcing steel. However, the report also stated the pier did not require any kind of seismic retrofitting.
As of 2013
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Tolls space only collected from westbound web traffic at the toy fee plaza on the eastern side of the bridge. Since July 2010, the toll price for passenger car is $5. For vehicles with an ext than 2 axles, the toll rate is $5 per axle. Motorists may either pay through cash or use the FasTrak electronic toll collection device. Throughout peak traffic hours, the 2 left lanes space designated HOV lanes, enabling carpool vehicles delivering two or more people or motorcycles to pass for a toll of $2.50. The next three lanes are FasTrak-only lanes. Throughout non-peak hours the 2 HOV lanes come to be FasTrak-only lanes.