Editing Dumbarton Bridge (California)

{{Short description|Southernmost bridge crossing the San Francisco Bay}}
{{Use mdy dates|date=April 2025}}
{{Use American English|date=January 2025}}
{{Infobox bridge
 | bridge_name       = Dumbarton Bridge
 | image             = Dumbarton Bridge CA84 Aerial.jpg
 | caption           = Aerial view of the Dumbarton Bridge
 | official_name     = 
 | also_known_as     = 
 | carries           = {{Bulleted list
    | 6 lanes of {{jct|state=CA|SR|84}}
    | Bicycles and pedestrians
    }}
 | crosses           = [[San Francisco Bay]]
 | locale            = [[Menlo Park, California]] and [[Fremont, California]]
 | owner             = [[State of California]]
 | maint             = [[California Department of Transportation]] and the [[Bay Area Toll Authority]]
 | id                = 35 0038
 | website           = {{Official website|www.bayareafastrak.org}}
 | design            = [[Twin bridges|Twin]] [[girder bridge]]
 | material          = [[Concrete]]
 | mainspan          = {{Convert|103.63|m|ft|abbr=off|sp=us}}
 | length            = {{Convert|2,621.28|m|ft|abbr=off|sp=us}}, 1.63 miles
 | width             = 
 | clearance         = 
 | below             = {{Convert|25.91|m|ft|abbr=off|sp=us}} (main span)
 | traffic           = 70,000+ (auto)<br />118 (bike & pedestrian)
 | open              = {{Start date and age|1927|01|17}} (original span)<br>{{Start date and age|1982|10}} (current span)
 | closed            = 
 | toll              = {{Plainlist|
* Westbound only
* [[FasTrak]] or [[Video tolling|pay-by-plate]], cash not accepted
* Effective {{Start and end dates|2025|01|01|2025|12|31}}:
* $8.00
* $4.00 (carpool rush hours, FasTrak only)
  }}
 | coordinates       = {{Coord|37.5069|-122.1169|scale:50000_region:US-CA_type:landmark|display=inline,title}}
}}
[[File:DumbartonBridgeCA and Towers.jpg|thumb|right|The Dumbarton Bridge and its adjacent powerline towers]]
The '''Dumbarton Bridge''' is the southernmost of the highway bridges across San Francisco Bay in [[California]]. Carrying over 70,000 vehicles<ref name="dumbarton-study-2017">{{Cite report|url=http://www.samtrans.com/Assets/Dumbarton+Rail+Corridor/PDFs/171120+DTCS+-+Full+Report.pdf|title=Dumbarton Transportation Corridor Study|date=November 2017|access-date=March 3, 2019|publisher=San Mateo County Transit District|archive-date=November 9, 2019|archive-url=https://web.archive.org/web/20191109085037/http://www.samtrans.com/Assets/Dumbarton+Rail+Corridor/PDFs/171120+DTCS+-+Full+Report.pdf|url-status=dead}}</ref> and about 118 pedestrian and bicycle crossings daily<ref>{{Cite news|last1=Spotswood|first1=Dick|title=Dick Spotswood: Richmond bridge third lane is working, but more needs to be done|url=http://www.marinij.com/opinion/20180508/dick-spotswood-richmond-bridge-third-lane-is-working-but-more-needs-to-be-done|access-date=9 May 2018|work=Marin Independent Journal|date=8 May 2018}}</ref> (384 on weekends<ref>{{Cite web |title=Bridge Bicycle/Pedestrian Path Counter Data |url=https://mtc.ca.gov/tools-resources/data-tools/bridge-bicyclepedestrian-path-counter-data |website=Metropolitan Transportation Commission |date=17 March 2021 |access-date=28 March 2021 |ref=mtc-bridge-pedbike-data}}</ref>), it is the shortest bridge across San Francisco Bay at {{Convert|1.63|mi|ft m}}. Its eastern end is in [[Fremont, California|Fremont]], near [[Newark, California|Newark]] in the [[San Francisco Bay National Wildlife Refuge]], and its western end is in [[Menlo Park, California|Menlo Park]]. Bridging [[California State Route 84|State Route 84]] across the bay, it has three lanes each way and a separated bike/pedestrian lane along its south side. As with the [[San Mateo–Hayward Bridge]] to the north, [[electric power transmission|power line]]s parallel the bridge.

==History and engineering features==
[[Image:DumbartonBr.jpg|thumb|right|The original vertical-lift span of the Dumbarton Bridge, shown in 1984 shortly before it was demolished]]The bridge has never been officially named, but its commonly used name comes from Dumbarton Point near the east end of the bridge, named in 1876 after [[Dumbarton, Scotland]]. Built originally to provide a shortcut for traffic originating in San Mateo and Santa Clara counties, the bridge served industrial and residential areas on both sides. The earlier bridge opened on January 17, 1927,<ref>{{Cite web|url=https://www.eastbaytimes.com/2017/01/17/the-old-dumbarton-bridge-did-you-see-it-fall-into-the-bay/|title=The old Dumbarton Bridge: Did you see it fall into the bay?|date=January 17, 2017}}</ref> and was the first vehicular bridge to cross San Francisco Bay. A portion of this old drawbridge remains as a fishing pier on the east side of the Bay. The original bridge was built with private capital and then purchased by the state for $2.5 million in 1951 (equivalent to ${{Inflation|US|2.5|1951|r=2}}&nbsp;million in {{Inflation/year|US}}).

Its age, and the two-lane undivided roadway and lift-span, led to a replacement bridge being built to the north. This bridge opened in October 1982 as a four-lane, high-level structure. The structure was re-striped to accommodate six lanes on October 18, 1989, in response to the temporary closing of the [[San Francisco–Oakland Bay Bridge]] due to the [[Loma Prieta earthquake]], and the permanent widening of the approaches was completed by July 2003.<ref>"Dumbarton Bridge" {{Cite web|url=http://bata.mtc.ca.gov/bridges/dumbarton.htm |title=Bay Area Toll Authority - Bridge Facts - Dumbarton Bridge |access-date=2012-02-28 |url-status=dead |archive-url=https://web.archive.org/web/20120221185117/http://bata.mtc.ca.gov/bridges/dumbarton.htm |archive-date=2012-02-21 }}</ref> The cost of the complete replacement project was $200 million (equivalent to ${{Inflation|US|200|2003|r=2}}&nbsp;million in {{Inflation/year|US}}). The current bridge includes a two-way bicycle and separate pedestrian path on the south-facing side. A {{Convert|340|ft|m|0|abbr=on}} center span provides {{Convert|85|ft|m|0|abbr=on}} of vertical clearance for shipping. The approach spans on both sides of the Bay are of pre-stressed [[lightweight concrete]] [[girder]]s supporting a lightweight concrete deck. The center spans are twin steel trapezoidal girders which also support a lightweight concrete deck.

The center span of the original bridge was demolished in a controlled explosion in September 1984.
[[Image:Dumbarton Bridge CA from the air.JPG|thumb|right|A view from the air, above Palo Alto, looking towards Fremont]]

==Roadway connections==
{{More citations needed section|date=November 2021}}

The bridge is part of [[California State Route 84|State Route 84]], and is directly connected to [[Interstate 880 (California)|Interstate 880]] by a [[freeway]] segment north of the Fremont end.
There is no freeway connection between [[U.S. Route 101 in California|U.S. 101]] and the southwest end of the Dumbarton Bridge. Motorists must traverse one of three at-grade routes to connect from the Bayshore Freeway to the bridge. These are (from northwest to southeast):
# the Bayfront Expressway, a [[limited-access road]] linking to U.S. 101 at Marsh Road, [[Atherton, California|Atherton]] (the official routing of SR 84)
# Willow Road ([[California State Route 114|SR 114]]), an approximately one-mile expressway through east Menlo Park to U.S. 101
# University Avenue ([[California State Route 109|SR 109]]), an [[arterial road]] and the main commercial street of [[East Palo Alto, California|East Palo Alto]].

The Willow Road and University Avenue junctions with Bayfront Expressway are at-grade intersections controlled by traffic lights; there are two additional controlled intersections at Chilco Road and Marsh Road, and the Marsh Road interchange on U.S. 101 is a [[Partial cloverleaf interchange|parclo]]. The result is that Bayfront Expressway is frequently congested, and when not congested is often the site of high-speed car crashes. In 2007, author [[David Halberstam]] was killed in one such crash at the Willow Road intersection.

Access to [[Interstate 280 in California|I-280]] is available via State Route 84 to Woodside Road (as signed) or other arterial routes. There are no cross-Peninsula freeway connections between State Routes 92 and 84. In addition, there are no direct cross-Peninsula arterial routes between State Route 84 and Page Mill Road, a five-mile gap.

Although the present situation has resulted in severe traffic problems on the bridge itself and in Menlo Park and East Palo Alto, Caltrans has been unable to upgrade the relevant portion of Highway 84 to freeway standards for several decades, due to opposition from the cities of Menlo Park, Atherton and [[Palo Alto, California|Palo Alto]]. Freeway opponents fear that upgrading Highway 84 will encourage more people to live in southern [[Alameda County, California|Alameda County]] (where housing is more affordable) and commute to jobs in the mid-Peninsula area (where businesses wish to be located in order to be close to [[Silicon Valley]]), thus increasing traffic in their neighborhoods to the south and west of U.S. 101 and even along State Routes 85 and 237.

Bus service across the bridge is provided by the [[Dumbarton Express]], run by a consortium of local transit agencies ([[SamTrans]], [[AC Transit]], [[Santa Clara Valley Transportation Authority|VTA]] and others) which connects to [[Bay Area Rapid Transit|BART]] at Union City and [[Caltrain]] at Palo Alto and California Avenue. AC Transit also runs Transbay buses U ([[Fremont (BART station)|Fremont BART]] and [[Fremont-Centerville (Amtrak station)|Amtrak]] to [[Stanford University|Stanford]]) and DA (Ardenwood to [[Oracle Corporation|Oracle]] and [[Facebook]] headquarters) across the bridge. The free [[Stanford Marguerite Shuttle]] also runs buses AE-F and EB across the bridge.

==Environmental factors==
When the current bridge was planned in the 1970s, [[Caltrans]] conducted extensive environmental research on the [[marine biology|aquatic]] and [[landform|terrestrial]] environment. Principal concerns of the public were [[air pollution]] and [[noise pollution]] impacts, particularly in some residential areas of Menlo Park and [[East Palo Alto]]. Studies were conducted to produce contour maps of projected [[Sound exposure level|sound level]]s and [[carbon monoxide]] concentrations throughout the western approaches, for each alternative connection scheme.<ref>C.M. Hogan, Leda Patmore, Harry Seidman et al., ''Air Quality and Acoustics Analysis for the Dumbarton Bridge Replacement Project'', ESL Inc., prepared for the Bay Area Division of Toll Crossings (1973)</ref>

The area around the bridge is an important ecological area, hosting many species of birds, fish and mammals. The [[endangered species]] [[California clapper rail]] is known to be present in the western bridge terminus area.

Near the bridge on the Peninsula are Menlo Park's Bayfront Park, East Palo Alto's Ravenswood Open Space Preserve, and the [[Palo Alto Baylands Nature Preserve]]. An accessible portion of the [[San Francisco Bay National Wildlife]] Refuge lies immediately north of the western bridge terminus, where the Ravenswood trail runs.<ref>''San Francisco Bay Shoreline Guide'', by California State Coastal Conservancy, University of California Press (1995) {{ISBN|0-520-08878-6}}</ref>

On both sides of the east end of the bridge are large salt ponds and [[levee]] trails belonging to the [[Don Edwards San Francisco Bay National Wildlife Refuge]]. The headquarters and visitor center for the refuge is on a hill south of the bridge approach. North of the east end of the bridge is [[Coyote Hills Regional Park]], with its network of trails running over tall hills. North of that is the [[Alameda Creek Regional Trail]] from the Bay to [[Niles Canyon]]. East of [[Coyote Hills (Alameda County)|Coyote Hills]] is [[Ardenwood Historic Farm]], a restored working farm that preserves and displays turn-of-the-century farming methods

==Tolls==
Tolls are only collected from westbound traffic headed to Menlo Park at the toll plaza on the Fremont side of the bay. [[All-electronic tolling]] has been in effect since 2020, and drivers may either pay using the [[FasTrak]] electronic toll collection device or using the license plate tolling program. It remains not truly an [[open road tolling]] system until the remaining unused toll booths are removed, forcing drivers to slow substantially from freeway speeds while passing through. Effective {{Start and end dates|2025|01|01|2025|12|31}}, the toll rate for passenger cars is $8. During peak traffic hours on weekdays between 5:00&nbsp;am and 10:00&nbsp;am, and between 3:00&nbsp;pm and 7:00&nbsp;pm, [[carpool]] vehicles carrying three or more people, clean air vehicles, or motorcycles may pay a discounted toll of $4 if they have FasTrak and use the designated carpool lane. Carpools with two people may also receive the discount until 2026. Drivers without Fastrak or a license plate account must open and pay via a "short term" account within 48 hours after crossing the bridge or they will be sent an invoice of the unpaid toll. No additional toll violation penalty will be assessed if the invoice is paid within 21 days.<ref>{{Cite web|title=Dumbarton Bridge|url=https://www.bayareafastrak.org/en/tolls/dumbarton-bridge.shtml|website=www.bayareafastrak.org|publisher=CalTrans|access-date=January 1, 2024}}</ref><ref>{{cite web|title=Ways to Pay|url=https://www.bayareafastrak.org/en/home/ways-to-pay.shtml|website=www.bayareafastrak.org|publisher=CalTrans|access-date=January 12, 2025}}</ref><ref>{{cite web|title=Invoices and Penalties|url=https://www.bayareafastrak.org/en/help/invoices-and-penalties-faqs.shtml|website=www.bayareafastrak.org|publisher=CalTrans|access-date=January 12, 2025}}</ref>

===Historical toll rates===
Prior to 1969, tolls on the Dumbarton Bridge were collected in both directions. When it opened, the original 1927 span had a toll of $0.40 per car ({{inflation|US|0.40|1927|r=2|fmt=eq}}) plus $0.05 per passenger ({{inflation|US|0.05|1927|r=2|fmt=eq}}). In 1959, tolls were set to $0.35 per car ({{inflation|US|0.35|1959|r=2|fmt=eq}}). It was raised to $0.70 in 1969 ({{inflation|US|0.70|1969|r=2|fmt=eq}}), then $0.75 in 1976 ({{inflation|US|0.75|1976|r=2|fmt=eq}}). The toll per car remained at $0.75 when the replacement bridge opened in 1982 ({{inflation|US|0.75|1982|r=2|fmt=eq}}).<ref>{{Cite web | url=http://www.dot.ca.gov/dist4/documents/tollfees.pdf |archive-url=https://web.archive.org/web/20040613010500/http://www.dot.ca.gov/dist4/documents/tollfees.pdf |archive-date=2004-06-13 |url-status=live | title=History of California's Bridge Tolls | publisher=[[California Department of Transportation|Caltrans]] | access-date=June 3, 2018}}</ref>

The basic toll (for automobiles) on the seven state-owned bridges, including the Dumbarton Bridge, was standardized to $1 by Regional Measure 1, approved by Bay Area voters in 1988 ({{inflation|US|1|1988|r=2|fmt=eq}}).<ref>{{cite web |url = http://bata.mtc.ca.gov/projects/rm1.htm |title = Regional Measure 1 Toll Bridge Program |publisher = Bay Area Toll Authority |archive-url = https://web.archive.org/web/20101104094253/http://bata.mtc.ca.gov/projects/rm1.htm |url-status = dead |archive-date = November 4, 2010 }}</ref> A $1 seismic retrofit surcharge was added in 1998 by the state legislature, increasing the toll to $2 ({{inflation|US|2|1998|r=2|fmt=eq}}), originally for eight years, but since then extended to December 2037 (AB1171, October 2001).<ref name='AB1171'>{{cite news|first=John |last=Dutra |title=AB 1171 Assembly Bill – Chaptered |date=October 14, 2001 |publisher=[[California State Assembly]] |url=https://www.leginfo.ca.gov/pub/01-02/bill/asm/ab_1151-1200/ab_1171_bill_20011014_chaptered.html |access-date=August 7, 2008 |archive-url=https://web.archive.org/web/20120315184435/https://www.leginfo.ca.gov/pub/01-02/bill/asm/ab_1151-1200/ab_1171_bill_20011014_chaptered.html |archive-date=March 15, 2012 |url-status=live }}</ref> On March 2, 2004, voters approved Regional Measure 2 to fund various transportation improvement projects, raising the toll by another dollar to $3 ({{inflation|US|3.00|2004|r=2|fmt=eq}}). An additional dollar was added to the toll starting January 1, 2007, to cover cost overruns on the [[Eastern span replacement of the San Francisco–Oakland Bay Bridge|eastern span replacement of the Bay Bridge]], increasing the toll to $4 ({{inflation|US|4|2007|r=2|fmt=eq}}).<ref>{{cite web |last=Cabanatuan |first=Michael |title=$1 toll hike for bridges approved |url=https://www.sfgate.com/news/article/1-toll-hike-for-bridges-approved-2505984.php |website=sfgate.com | date=January 25, 2006 | access-date=January 2, 2025}}</ref>

The [[Metropolitan Transportation Commission (San Francisco Bay Area)|Metropolitan Transportation Commission]], a regional transportation agency, in its capacity as the [[Bay Area Toll Authority]], administers RM1 and RM2 funds, a significant portion of which are allocated to public transit capital improvements and operating subsidies in the transportation corridors served by the bridges. Caltrans administers the "second dollar" seismic surcharge, and receives some of the MTC-administered funds to perform other maintenance work on the bridges. The Bay Area Toll Authority is made up of appointed officials put in place by various city and county governments, and is not subject to direct voter oversight.<ref>{{cite web|title=About MTC |publisher=Metropolitan Transportation Commission |date=October 15, 2009 |url=https://www.mtc.ca.gov/about_mtc/about.htm |access-date=October 15, 2009 |archive-url=https://web.archive.org/web/20101103124604/https://www.mtc.ca.gov/about_mtc/about.htm |archive-date=November 3, 2010 |url-status=live }}</ref>

Due to further funding shortages for seismic retrofit projects, the Bay Area Toll Authority again raised tolls on all seven of the state-owned bridges in July 2010. The toll rate for autos on the Dumbarton Bridge was thus increased to $5 ({{inflation|US|5.00|2010|r=2|fmt=eq}}).<ref>{{cite web |title=Frequently Asked Toll Questions |publisher=Bay Area Toll Authority |date=June 1, 2010 |url=https://www.mtc.ca.gov/tolls/faq.htm#2 |access-date=June 29, 2010 |archive-url=https://web.archive.org/web/20101122040153/https://www.mtc.ca.gov/tolls/faq.htm#2 |archive-date=November 22, 2010 |url-status=live }}</ref>

In June 2018, Bay Area voters approved Regional Measure 3 to further raise the tolls on all seven of the state-owned bridges to fund $4.5 billion worth of transportation improvements in the area.<ref>{{Cite news | url=https://www.sfgate.com/bayarea/article/3-hike-to-Bay-Area-tolls-appears-to-have-support-12972027.php | title=Regional Measure 3: Work on transportation improvements could start next year | first=Michael | last=Cabanatuan | newspaper=SFGate.com | date=June 6, 2018}}</ref><ref>{{Cite news | url=http://www.ktvu.com/news/bay-area-bridge-tolls-to-increase-one-dollar-in-january-except-golden-gate | title=Bay Area bridge tolls to increase one dollar in January, except Golden Gate | first=Christien | last=Kafton | publisher=KTVU | date=November 28, 2018}}</ref> Under the passed measure, the toll rate for autos on the Dumbarton Bridge was increased to $6 on January 1, 2019; to $7 on January 1, 2022; and then to $8 on January 1, 2025.<ref>{{Cite press release | url=https://mtc.ca.gov/whats-happening/news/tolls-seven-bay-area-bridges-set-rise-next-month | title=Tolls on Seven Bay Area Bridges Set to Rise Next Month | publisher=Metropolitan Transportation Commission | date=December 11, 2018 | access-date=December 16, 2018}}</ref>

In September 2019, the MTC approved a $4 million plan to eliminate toll takers and convert all seven of the state-owned bridges to [[all-electronic tolling]], citing that 80 percent of drivers are now using Fastrak and the change would improve traffic flow.<ref>{{Cite news | url=https://www.sacbee.com/news/california/article234765937.html | title=Do you drive to the Bay Area? A big change is coming to toll booths at the bridges | first=Darrell | last=Smith | newspaper=The Sacramento Bee | date=September 7, 2019 | access-date=April 12, 2020}}</ref> On March 20, 2020, accelerated by the [[COVID-19 pandemic]], all-electronic tolling was placed in effect for all seven state-owned toll bridges.<ref>{{Cite web|url=https://mtc.ca.gov/whats-happening/news/cash-toll-collection-suspended-bay-area-bridges|title=Cash Toll Collection Suspended at Bay Area Bridges|date=March 20, 2020|website=Metropolitan Transportation Commission|language=en|access-date=March 20, 2020}}</ref> The MTC then installed new systems at all seven bridges to make them permanently cashless by the start of 2021.<ref>{{Cite web|url=https://mtc.ca.gov/news/new-year-brings-new-toll-collection-system-bay-area-bridges|title=New Year Brings New Toll Collection System to Bay Area Bridges|date=December 28, 2020|website=Metropolitan Transportation Commission|language=en|access-date=December 28, 2020}}</ref> In April 2022, the Bay Area Toll Authority announced plans to remove all remaining unused toll booths and create an open-road tolling system which functions at highway speeds.<ref>{{Cite web |last1=Cabanatuan |first1=Michael |title=Bay Area toll collectors are gone, so what happens to the tollbooths? Here's the $77 million answer |url=https://www.sfchronicle.com/bayarea/article/Bay-Area-toll-collectors-vanished-when-COVID-hit-17068234.php |publisher=San Francisco Chronicle |access-date=12 April 2022 |date=10 April 2022}}</ref>

The Bay Area Toll Authority then approved a plan in December 2024 to implement 50-cent annual toll increases on all seven state-owned bridges between 2026 and 2030 to help pay for bridge maintenance. The standard toll rate for autos will thus rise to $8.50 on January 1, 2026; $9 in 2027; $9.50 in 2028; $10 in 2029; and then to $10.50 in 2030. And becoming effective in 2027, a 25-cent surcharge will be added to any toll charged to a license plate account, and a 50-cent surcharge added to a toll violation invoice, due to the added cost of processing these payment methods. The carpool lane rules will also be standardized across the toll bridges in 2026, with a minimum of three people required to qualify for the discount.<ref>{{cite press release | url=https://mtc.ca.gov/news/toll-authority-approves-2026-toll-hike-carpool-policy-changes | title=Toll Authority Approves 2026 Toll Hike, Carpool Policy Changes | publisher=Metropolitan Transportation Commission | date=December 18, 2024 | access-date=January 2, 2025}}</ref><ref>{{cite web |last=Vaziri |first=Aidin |title=Bay Area bridge tolls to rise by up to $4.50 over the next five years |url=https://www.sfchronicle.com/bayarea/article/bay-area-bridge-toll-hikes-19990879.php |publisher=San Francisco Chronicle | date=December 19, 2024 | access-date=January 2, 2025}}</ref>

==Dumbarton Rail Bridge==
{{main|Dumbarton Rail Bridge}}

[[Image:Dumbarton Bridge1.jpg|right|thumb|Dumbarton Rail Bridge in 2007, as seen from a kayak]]
Just to the south of the car bridge lies the '''Dumbarton Rail Bridge'''. Built in 1910, the rail bridge has been unused since 1982 and its western approach collapsed in a fire in 1998.<ref>{{Cite web|url = https://www.paloaltoonline.com/weekly/morgue/news/1998_Jan_7.FIRE.html|title = FIREFIGHTERS: Dumbarton rail bridge destroyed|publisher = Paloaltoonline.com|date = 1998-01-07|access-date = 2015-05-25|last = Kazak|first = Don|archive-url = https://web.archive.org/web/20040814110454/https://www.paloaltoonline.com/weekly/morgue/news/1998_Jan_7.FIRE.html|archive-date = 2004-08-14|url-status = live}}</ref> When the bridge was in use, boaters would signal the operator, who would start a diesel engine and rotate the bridge to the open position on a large gear. The bridge is now left in the open position as shown. There are plans for a new rail bridge and rehabilitation of the rail line to serve a commuter rail service to connect Union City, [[Fremont, California|Fremont]], and Newark to various [[San Francisco Peninsula|Peninsula]] destinations.<ref>{{Cite web |url=http://www.smcta.com/Dumbarton_Rail/information.asp |title=Dumbarton Rail Corridor |publisher=SMCTA |date=2011-05-24 |access-date=2011-08-21 |archive-date=2012-04-17 |archive-url=https://web.archive.org/web/20120417143948/http://www.smcta.com/Dumbarton_Rail/information.asp |url-status=dead }}</ref>  A successful March 2004 regional transportation ballot measure included funding to rehabilitate the rail bridge for the commuter rail service, but in October 2008 the Metropolitan Transportation Commission transferred $91 million from this project to the [[BART]] [[Silicon Valley BART extension#Warm Springs extension|Warm Springs extension]] in Fremont<!-- , delaying for at least a decade plans to send commuter trains across the bridge -->.<ref>{{Cite news
  | title = BART's Warm Springs Extension Gets Boost From Regional Measure 2 Cash
  | url = http://www.newsrx.com/newsletters/Healthcare-Finance,-Tax-and-Law-Weekly/2008-10-08/3010082008199HFT.html
  | work = Healthcare Finance, Tax & Law Weekly
  | date = October 8, 2008
  | access-date = 2009-08-02
}}</ref>

==Hetch Hetchy Aqueduct==
Between the Dumbarton Bridge and the Dumbarton Rail Bridge is the Bay crossing of the [[Hetch Hetchy Aqueduct]]. The aqueduct rises above ground in Newark at the east side of the Bay, falls below the water's surface at a pump station in Fremont, re-emerges in the middle of the Bay and then continues above water until it reaches the west side of the Bay at Menlo Park.<ref>{{Cite web|author=Ronald Horii |url=http://baytrail.abag.ca.gov/vtour/map3/access/Btdmbrtn/Btdmbrtn.htm |title=Dumbarton Bridge |publisher=Baytrail.abag.ca.gov |access-date=2011-08-21 |url-status=dead |archive-url=https://web.archive.org/web/20110807051038/http://baytrail.abag.ca.gov/vtour/map3/access/Btdmbrtn/Btdmbrtn.htm |archive-date=2011-08-07 }}</ref>

==In popular culture==
A scene of the 1971 movie ''[[Harold and Maude]]'' was filmed at the original toll plaza and showed Maude speeding and disobeying a police officer.<ref>{{Cite web|url=http://www.harold-and-maude.com/dumbartonbridge.html|title=Dumbarton Bridge|website=harold-and-maude.com|access-date=2019-05-11|archive-url=https://web.archive.org/web/20180816161104/http://www.harold-and-maude.com/dumbartonbridge.html|archive-date=2018-08-16}}</ref>

==References==
{{Reflist|30em}}

==External links==
* [http://www.bayareafastrak.org/ Bay Area FasTrak] – includes toll information on this and the other Bay Area toll facilities
* [http://www.dot.ca.gov/dist4/dumbarton/ California Dept. of Transportation: Dumbarton Bridge]
* [https://web.archive.org/web/20110807051038/http://baytrail.abag.ca.gov/vtour/map3/access/Btdmbrtn/Btdmbrtn.htm Bay Trail: Dumbarton Bridge]
* {{Structurae|id=20009342|title=Dumbarton Bridge}}

{{San Francisco Bay watershed}}
{{Menlo Park, California}}
{{Crossings navbox
|structure       = Crossings
|place           = [[San Francisco Bay]]
|bridge          = Dumbarton Bridge
|bridge signs    = [[Image:California 84.svg|20px|State Route 84]]
|upstream text   = South
|upstream        = [[Hetch Hetchy]] Aqueduct
|upstream signs  = 
|downstream text = North
|downstream      = [[San Mateo–Hayward Bridge]]
|downstream signs = [[Image:California 92.svg|20px|State Route 92]]
}}

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[[Category:Bridges in the San Francisco Bay Area]]
[[Category:Road bridges in California]]
[[Category:Bridges in Alameda County, California]]
[[Category:Bridges in San Mateo County, California]]
[[Category:Concrete bridges in California]]
[[Category:Toll bridges in California]]
[[Category:Bridges completed in 1927]]
[[Category:Bridges completed in 1982]]
[[Category:Buildings and structures in Fremont, California]]
[[Category:Menlo Park, California]]
[[Category:San Francisco Bay]]
[[Category:San Francisco Bay Trail]]
[[Category:1927 establishments in California]]
[[Category:Girder bridges in the United States]]