Contents 1 History and description 1.1 Original span (1927–2007) 1.2 Parallel span (1958) 1.3 Alfred Zampa Memorial Bridge (2003 replacement span) 2 Tolls 3 Structural Health Monitoring on the westbound span 4 Carquinez Bridge in the media 5 See also 6 References 7 External links

History and description[edit] The first regular crossing of the Carquinez Strait began in the mid-1800s as a ferry operated between the cities of Benicia and Martinez, six miles upstream from the bridge site. Auto service started on this route in 1913. A train ferry operated between Benicia and Porta Costa from 1879 until 1930 when a rail bridge opened. Ferry service at the site of the bridge started in 1913 by the Rodeo-Vallejo Ferry Company.[1] Original span (1927–2007)[edit] The original steel cantilever bridge was designed by Robinson & Steinman and dedicated on May 21, 1927. Prior to this, crossing the Carquinez Strait necessitated the use of ferries. The bridge cost $8 million to build. It was the first major crossing of the San Francisco Bay[2] and a significant technological achievement in its time. Upon its completion, the span became part of the Lincoln Highway. This historic transcontinental roadway's original alignment, like the Transcontinental Railroad that preceded it nearly sixty years earlier, chose to avoid crossing the Carquinez Strait entirely. The preferred option, given the engineering limitations of the day, was to skirt around the Delta by going south from Sacramento through Stockton, then proceeding west across the San Joaquin River and over the Altamont Pass, and finally reaching Oakland from the south (a route that would later become U.S. Route 50 and ultimately Interstates 5, 205, and 580). This seemingly circuitous route, several miles longer and traversing a rather formidable mountain pass, was nevertheless preferable to the even more formidable prospect of bridging the Carquinez Strait, a deep channel with strong currents and frequent high winds. For decades, building a bridge here was considered prohibitively expensive and technologically risky. Once the bridge was built however, driving from Sacramento to the East Bay became much more direct. The Carquinez Bridge provided a welcome alternative route from the Central Valley to the Bay Area, one that no longer required loading one's vehicle onto and off of a ferry. With the bridge completed, the Lincoln Highway was realigned to cross the Sacramento River, then proceed southwest through Davis and Vallejo, across the Carquinez, and along the shores of the San Pablo and San Francisco bays to Richmond and Oakland (eventually U.S. Route 40 and ultimately Interstate 80). The 1927 span was dismantled in 2007, after it was temporarily used to hold eastbound traffic while the eastbound span underwent a seismic retrofit, deck and superstructure rehabilitation, and painting to extend its serviceable life.[3] During demolition, the 3,000-pound bronze bell atop one of the Carquinez Bridge piers was removed and placed into storage. The bell will eventually be displayed in a new museum to be built at the Oakland end of the San Francisco–Oakland Bay Bridge. Parallel span (1958)[edit] In 1958, at a cost of $38 million[4] a second bridge was built alongside and to the east of the bridge. This new span, nearly identical to the first, was needed to accommodate the ever-increasing levels of traffic. The three-lane 1927 span, originally two-way, now served only westbound drivers while the 1958 span handled eastbound traffic. Alfred Zampa Memorial Bridge (2003 replacement span)[edit] Carquinez Bridge in 2006 with the 1927 span in the center. Aerial view of Carquinez Strait and bridges, prior to construction of the new suspension bridge In 2003, as a resolution to seismic problems of the aging 1927 span brought to light after the Loma Prieta earthquake, a new suspension bridge was opened to replace it, at a cost of $240 million.[4] This new bridge was named the Alfred Zampa Memorial Bridge, after an ironworker who worked on a number of the San Francisco Bay Area bridges, including the Golden Gate Bridge and the original 1927 Carquinez span. This span features a pedestrian and bicycle path, part of a bike trail which it is hoped will eventually circle the entire Bay Area. The span measures 0.66 miles (1,060 m). The bridge was dedicated on November 8, 2003 and opened for traffic on November 11. (Originally, the plan was to dedicate the bridge on November 15, but complications involving when just-recalled Governor Gray Davis would have to transfer power to Arnold Schwarzenegger resulted in the date being moved. The coins minted to commemorate the event have the old date on them.[5]). The new suspension bridge, to the west of the earlier bridges, has spans of 147 m, 728 m, and 181 m. Built by the Joint Venture consisting of Flatiron Structures (Longmont, Co.), FCI Constructors (Benicia, Ca.), and Cleveland Bridge & Engineering Company of Darlington, England, it consists of the south anchorage, a transition pier, two towers (South and North towers), and the north anchorage. The towers are each founded on two footings, which are each supported by six vertical, 3-metre-diameter (9.8 ft) steel shells infilled with reinforced concrete, followed by 2.7-metre-diameter (8.9 ft) drilled shafts in rock (i.e., cast-in-drilled hole, or CIDH, piles). The total length of the CIDH pile at the South Tower is approximately 89 m, with about 43 m of drilled shaft in rock. The total length of the CIDH pile at the North Tower ranges from 49 to 64 m, with about 16 to 26 m of drilled shaft in rock. The design parameters used for the South Tower piles were later confirmed by a pile load test. Additional field investigations during construction revealed significant variations in rock conditions at the North Tower, resulting in the redesign of the length of the piles. Major construction challenges encountered during construction of the South Tower piles, and the revised construction procedure (i.e., under-reaming) used by the constructor to mitigate caving. Materials for the New Bridge came from all over the world: Steel Caissons for CIDH: XKT Engineering – Mare Island, Ca. Orthotropic Deck Sections: IHI – Japan Tower and Splay Saddles: Sheffield Steel (Castings – Sheffield, England) (Finishing and Machining: Kvaerner – England) Main Cable Wire: Bridon – England Wire for Cable Wrapping: Canada Cable Bands – France Suspenders (Hardware, Casting, Fabrication): WRCA – St. Joseph, Missouri (3) Maintenance Travelers Under Deck Sections: Jesse Engineering – Tacoma, Washington By September 4, 2007, all of the original 1927 steel structure had been demolished.

Tolls[edit] This section contains instructions, advice, or how-to content. The purpose of Wikipedia is to present facts, not to train. Please help improve this article either by rewriting the how-to content or by moving it to Wikiversity, Wikibooks or Wikivoyage. (March 2018) Tolls are collected only from automotive traffic headed eastbound, towards Vallejo at the toll plaza on the north side of the bridge (which is after you cross the bridge). Although the 2003 Al Zampa Memorial Bridge is newer than the other span, no toll is charged in that direction, continuing the practice of when the now-demolished 1927 span was still in operation. Since July 2010, the toll rate for passenger cars is $5. During peak traffic hours, carpool vehicles carrying two or more people or motorcycles pay a discounted toll of $2.50.[6][7] For vehicles with more than two axles, the toll rate is $5 per axle.[8] Drivers may either pay by cash or use the FasTrak electronic toll collection device. If you cross over the bridge and can't pay the toll, you may be cited for toll evasion. Tickets usual starts at $30.00US ($5.00 for the toll and $25.00 for the violation). it can go up from there if you fail to pay the citation or if records show you have evaded in the past.

Structural Health Monitoring on the westbound span[edit] Carquinez Bridge in 2015 as seen from Vallejo, California. A long-term wireless structural monitoring system was installed starting in the summer of 2010 with the system in continuous operation since. The wireless monitoring system installed is based on the use of a wireless sensor node developed at the University of Michigan termed Narada. Narada is a wireless data acquisition system specially designed for monitoring civil infrastructure systems where low power consumption (i.e., rechargeable battery operated), high data resolution (i.e., 16-bits or higher), and long communication ranges (i.e., 500 m or longer) are all required system capabilities. On the New Carquinez Suspension Bridge, a total of 33 Narada nodes each capable of collecting up to 4 independent channels of data were installed over a 2-year period with various sensing transducers interfaced: 23 tri-axial accelerometers (to measure deck and tower accelerations), 3 strain potentiometers (to measure longitudinal movement between the deck and the towers), 33 battery voltage detectors (to monitor the battery level on each Narada), 9 thermistors (to measure the ambient and girder temperatures), 2 wind vanes, 2 anemometers and 6 strain gages(to measure deck bending strains). A total of 124 sensing channels have been deployed on the bridge. The Narada nodes are all powered by rechargeable batteries that are continuously charged by solar panels installed on the top deck of the bridge.[9]

Carquinez Bridge in the media[edit] The 1927 span of the Carquinez Bridge is featured on a Season 4 episode of MythBusters in the Miniature Earthquake Machine segment. This experiment, based upon a claim by inventor Nikola Tesla that his mechanical oscillator produced an earthquake in 1898, employed a small tunable reciprocating mass driver to shake the bridge at its resonance frequency. While not structurally significant, the shaking was felt some distance from the driver. An hour-length program, titled Break It Down: "Bridge", documenting the demolition of the 1927 bridge aired on National Geographic Channel, on November 1, 2007 On October 5, 2007, a man jumped off the new 156-foot-high (48 m) bridge. The Coast Guard, Vallejo Police, and Fire responded to find him on the breakwater. He survived the fall. Four books have been published about, or featuring, the Carquinez Bridges:Spanning the Carquinez Strait: The Alfred Zampa Memorial Bridge (2003) Cal-Trans, Spanning the Strait: Building the Alfred Zampa Memorial Bridge (2004) by John V. Robinson, and Al Zampa and the Bay Area Bridges (2005) by John V. Robinson and, most recently, Carquinez Bridge: 1927-2007 (2017) by John V. Robinson The bridge was featured in the 2017 Netflix TV series 13 Reasons Why.

See also[edit] Bridges portal California portal

References[edit] ^ Hope, Andrew (2000). Carquinez Bridge, Spanning Carquinez Strait at Interstate 80, Vallejo, Solano County, CA, Historic American Engineering Record. p. 11. ^ The Barrier Broken – Vallejo Evening Chronicle, May 21, 1927 ^ "Old Carquinez Bridge is disappearing" – San Francisco Chronicle, April 25, 2006. ^ a b "Bay Area Toll Authority – Bridge Facts – Carquinez Bridge". 2011-01-27. Archived from the original on 2011-08-09. Retrieved 2011-08-21.  ^ "Alfred Zampa memorial coins"[full citation needed] Archived October 7, 2007, at the Wayback Machine. – Official Web Site ^ "Frequently Asked Toll Questions". Bay Area Toll Authority. 2010-06-01. Archived from the original on 2010-11-01. Retrieved 2010-06-29.  ^ "Toll Increase Information". Bay Area Toll Authority. 2010-06-01. Archived from the original on 2010-11-01. Retrieved 2010-06-29.  ^ "Toll Increase Information: Multi-Axle Vehicles". Bay Area Toll Authority. 2012-07-01. Archived from the original on 2013-12-30. Retrieved 2013-12-29.  ^ "New Carquinez Bridge – LIST Wiki". Retrieved 2014-01-06. 

External links[edit] Wikimedia Commons has media related to Carquinez Bridge. Alfred Zampa Memorial Bridge Foundation Bridging the Bay History of the Carquinez Bridge, as well as other bridges. Caltrans New Carquinez Bridge page Building the Al Zampa Bridge – Site written by Dick McCabe Jr, a union ironworker who worked on the bridge with pictures of the construction and a journal of the construction progress. Live Toll Prices for Carquinez Bridge Carquinez Strait Bridge (1927) at Structurae Carquinez Strait Bridge (1958) at Structurae Alfred Zampa Memorial (New Carquinez) Bridge (2003) at Structurae [1] Break it Down: "Bridge" on National Geographic Channel. [2] Bay Area Toll Authority Bridge Facts on Carquinez Bridge. [3] Publisher's Web site for Spanning the Strait: Building the Alfred Zampa Memorial Bridge, John V. Robinson's book about the new bridge. Third Carquinez Strait Bridge OAPC Consulting Engineers alternatives and selection report Historic American Engineering Record (HAER) No. CA-297, "Carquinez Bridge, Spanning Carquinez Strait at Interstate 80, Vallejo, Solano County, CA", 126 photos, 59 data pages, 8 photo caption pages v t e San Francisco Bay watershed Outline Hydrography Ecology List of tributaries List of lakes Subdivisions Major San Francisco Bay Suisun Bay San Pablo Bay Minor Golden Gate Grizzly Bay Richardson Bay San Rafael Bay Richmond Inner Harbor San Leandro Bay Former Yerba Buena Cove Mission Bay Waterways Rivers San Joaquin Sacramento Napa Guadalupe Petaluma Creeks (discharging into the Bay) Alameda Baxter Cerrito Codornices Coyote (Santa Clara) Coyote (Marin) San Leandro San Lorenzo Schoolhouse Temescal Sausal Redwood San Mateo Sonoma Corte Madera Arroyo Corte Madera del Presidio San Rafael Miller Novato Tolay San Francisquito Pacheco Alhambra Adobe Rodeo Refugio Pinole Garrity Rheem Karlson San Pablo Castro Wildcat Fluvius Innominatus Marin (Alameda County) Strawberry Easton Mission Creek Reservoirs Calaveras Reservoir Lafayette Reservoir Straits and estuaries Sacramento–San Joaquin River Delta Carquinez Strait Oakland Estuary Raccoon Strait Parks and protected areas Don Edwards National Wildlife Refuge San Pablo Bay National Wildlife Refuge Eden Landing Ecological Reserve Hayward Regional Shoreline Hayward Shoreline Interpretive Center Crown Memorial State Beach Eastshore State Park Emeryville Crescent State Marine Reserve Point Isabel Regional Shoreline César Chávez Park Brooks Island Regional Shoreline Point Pinole Regional Shoreline Antioch Dunes National Wildlife Refuge Coyote Point Park Middle Harbor Shoreline Park National Estuarine Research Reserve China Camp State Park San Francisco Maritime National Historical Park SF Bay Trail Oyster Bay Regional Shoreline Big Break Regional Shoreline Islands and peninsulas Major islands Alameda Alcatraz Angel Treasure Island Yerba Buena Minor Brooks Bair Bay Farm Belvedere Brother Castro Rocks Coast Guard Greco Mare Red Rock The Sisters Marin Islands Roe Ryer Seal Islands Peninsulas/infill Albany Bulb Point Isabel Foster City Fleming Point Hunters Point Steamboat Point Potrero Point Wetlands Chelsea Cordelia Crissy Field Hoffman Meeker Mowry Napa Sonoma Point Molate Seal Stege Suisun Westpoint Bridges and tubes Bridges San Francisco–Oakland Eastern span replacement Richmond–San Rafael San Mateo–Hayward Dumbarton Golden Gate Benicia–Martinez Antioch Carquinez Leimert Park Street Fruitvale High Street Bay Farm Island Tubes Posey/Webster Street Transbay Ports and marinas Port of San Francisco Port of Oakland Port of Richmond San Francisco Naval Shipyard Mare Island Naval Shipyard Port of Redwood City Berkeley Marina Oyster Point Marina/Park Clipper Yacht Harbor Westpoint Harbor Foster City Marina (proposed) Other Discovery Site Humphrey the Whale Cosco Busan oil spill Delta and Dawn Golden Gate Biosphere Reserve California clapper rail Reber Plan San Leandro Oyster Beds Thicktail chub Delta smelt Richmond Shipyards U.S. Army Corps of Engineers Bay Model Guadalupe Watershed Clifton Court Forebay Conservation and Development Commission The Watershed Project Save The Bay Harold Gilliam Marincello Citizens for East Shore Parks Friends of Five Creeks Urban Creeks Council Cargill salt infill Ferry service/SF Bay Ferry 1971 oil spill Greenbelt Alliance The Bay Institute San Francisco Baykeeper San Francisco Estuary and Watershed Science Water Trail Estuary Partnership Leslie Salt Portal Category Crossings of the Carquinez Strait Upstream Benicia-Martinez Bridge Carquinez Bridge Downstream Richmond-San Rafael Bridge Retrieved from "" Categories: Bridges in the San Francisco Bay AreaCarquinez StraitBridges in Contra Costa County, CaliforniaBridges in Solano County, CaliforniaRoad bridges in CaliforniaBridges on the Interstate Highway SystemInterstate 80Lincoln HighwaySteel bridges in the United StatesSuspension bridges in CaliforniaSan Francisco BayToll bridges in CaliforniaTolled sections of Interstate HighwaysVallejo, CaliforniaHistory of Solano County, CaliforniaBridges completed in 1927Bridges completed in 1958Bridges completed in 2003Historic American Engineering Record in CaliforniaSan Francisco Bay TrailCantilever bridges in the United States1927 establishments in CaliforniaHidden categories: Articles needing more detailed referencesWebarchive template wayback linksCoordinates on WikidataArticles needing cleanup from March 2018All pages needing cleanupArticles containing how-to sectionsStructurae ID different from Wikidata

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