Bay Bridge East Span

 

Bridge
Picture Provided by Caltrans


Links

NewBayBridge.org
The best site we have ever seen for a bridge project!

Bay Bridge East Span Project Web Site

The Original Bridge Facts

Articles

8/21/2000 Remaking The Bay Bridge Remaking The Bay BridgePile-Driving to Begin For Bay Bridge Section Key study not done, but Caltrans pushes ahead

10/12/1999  Bracing Roadways for Quake
Commuters pay price for world's largest seismic retrofit project

Michael Cabanatuan, Chronicle Staff Writer
Loma Prieta's brutal 15-second assault battered the Bay Area's transportation system like a prizefighter unleashing a relentless flurry of punches on an undersized opponent. It busted up the Bay Br...

10/12/1999  Bracing Roadways for Quake
Commuters pay price for world's largest seismic retrofit project

Michael Cabanatuan, Chronicle Staff Writer
Loma Prieta's brutal 15-second assault battered the Bay Area's transportation system like a prizefighter unleashing a relentless flurry of punches on an undersized opponent. It busted up the Bay Br...

09/22/1999  Fed-Up Mayors Say to Retrofit Bridge Instead
Navy assures approval to rebuild is coming soon

Michael Cabanatuan, Chronicle Staff Writer
As Caltrans and the Navy inched closer yesterday to an agreement allowing plans for a new Bay Bridge to proceed, two East Bay mayors urged scrapping the whole thing and retrofitting the...

09/16/1999  Bay Bridge Fix Can't Wait, Say Geologists
Span needs repair to hold in major quake, they say

Glen Martin, Michael Cabanatuan, Chronicle Staff Writers
Prominent Bay Area geologists are warning that the Bay Bridge would collapse during a major earthquake and are calling for speedy action to either replace or thoroughly retrofit the structure...

06/26/1998  E. Bay lawmaker wants election on bridge design
Kathleen Sullivan OF THE EXAMINER STAFF
Saying a November ballot measure is the only way to avoid a future "freeway on stilts," Assemblyman Don Perata has asked fellow Bay Area legislators to support his effort to put the controversial Ba...

10/17/1998  Caldecott Tunnel Under Seismic Scrutiny
Proposal for 4th bore spurs safety study

Michael Cabanatuan, Chronicle Staff Writer
Since the Loma Prieta earthquake rocked the Bay Area nine years ago today, the phrase ``seismic retrofit'' has become part of every motorist's vocabulary...

03/17/1999  Bridge design safety disputed by S.F. mayor
Eric Brazil OF THE EXAMINER STAFF
Mayor Willie Brown, rebuffed in his attempt to realign the Bay Bridge's new eastern span, has opened a second front in his battle to persuade Caltrans to change its plans...

03/16/1999  Mayor agrees: Bay Bridge plan unsafe
Eric Brazil OF THE EXAMINER STAFF
Mayor Brown, rebuffed in his attempt to realign the Bay Bridge's new eastern span, on Tuesday opened a second front in his battle to persuade Caltrans to change its plans...

05/11/1998  A Bridge for the 21st Century
A BRIDGE FOR THE 21ST CENTURY ...

 

PROJECT OVERVIEW

The collapse of a portion of the upper deck of the Bay Bridge following the Loma Prieta Earthquake demonstrated the critical need for seismic safety on Bay Area bridges. Caltrans is conducting a seismic upgrade for the Bay Bridge, which encompasses six projects. This site provides information on the upgrade of the East Span section of the bridge, which runs from Yerba Buena Island to the Oakland shore. The formal name of this effort is the San Francisco-Oakland Bay Bridge East Span Seismic Safety Project, known more simply as the East Span Project

The preferred alternative will construct a new bridge (two side-by-side bridge decks, each with five lanes plus shoulders) north of the existing bridge and will dismantle the old bridge. The replacement bridge will be a combination self-anchored suspension/skyway design, which was recommended as the locally preferred option by the Metropolitan Transportation Commission (MTC) after extensive reviews. The new span will include a bicycle/pedestrian path on the south side of the eastbound deck.

PROJECT UPDATE

7-21-02

The California Department of Transportation has awarded a $10.9 million contract to Parsons Brinckerhoff  to perform biological monitoring during construction of the new self-anchored suspension bridge in San Francisco Bay. The bridge construction is  taking place in a biologically sensitive area and one of the world's richest estuary/marine environments.

5-14-02

  PASADENA, Calif. - Ameron International Corporation ("Ameron" or "Company") (NYSE:AMN) announced today that its Water Transmission Group has been awarded a contract totaling almost $57 million to supply large diameter steel pilings for the foundation of the new eastern section of the San Francisco/Oakland Bay Bridge. The bridge section that will be replaced collapsed during the 1989 San Francisco earthquake. The overall replacement project which includes seismic upgrades, new ramps, a skyway and a new suspension bridge is estimated to cost $2.6 billion. The California Department of Transportation (Caltrans) has awarded the prime contract to KFM, a joint venture between Kiewit Pacific, FCI Construction and Manson Construction.
    The eastern section will extend approximately 1.5 miles from Oakland to a newly constructed suspension bridge. The eastern section will consist of side-by-side decks with five lanes of traffic in each direction. The steel pilings that will be produced by Ameron will consist of rolled steel sections in eight-foot diameters using steel plate of up to three inches thick. The pilings will be up to 365 feet in length. Manufacturing of the steel sections will take place at Ameron's heavy steel fabrication plant in Fontana, California, one of the few facilities in the West capable of fabricating steel casings of these diameters and thicknesses. Production is scheduled to commence in mid 2002 and will extend through 2003.
    "This contract illustrates Ameron's extensive technical and manufacturing capabilities. It is an excellent example of our stated strategy to grow and to diversify the Company into new products and markets," said James S. Marlen, Ameron Chairman, President and Chief Executive Officer.

4-7-2002

When finished the bridge will look like this:

New Eastern Span Design
Picture Provided by Caltrans

Scale Model


Click on photo for larger view

The new bridge is expected to cost 2.6 billion dollars with the money coming from surcharges placed on local bridges. Construction has begun on the bridge in late January and we will have updates  posted here.

1-2-2001

Pile Installation Demonstration Project Completed (Provided by Caltrans)

pile lores.jpg (3478 bytes)The Pile Installation Demonstration Project (PIDP) conducted from October 19, 2000 to December 13, 2000 is expected to provide information on construction techniques for the East Span Project. The piles used for the demonstration project are the same type that have been developed for the risk design's main span and skyway structure foundations. Similar foundations would be developed for the other build alternatives. The large, deeply driven piles repres  ent innovative technology that will be used to construct the East Span. The support from the large steel piles is a critical seismic safety feature for the East Span.

Caltrans conducted the PIDP to test the procedures and effects of driving large steel piles through relatively soft soils into the dense sands of the Alameda Formation that exists below the Bay’s waters.

Caltrans installed massive battered piles (piles installed at an angle) through the Bay's waters. The piles measured 2.5 meters in diameter (8 feet) and 107 meters in length (350 feet). The pile size is unique, as is the method used to drive the piles into the soil. Two of the three piles were installed at an angle of one horizontal length to six vertical lengths or 9.5 degrees from vertical.

The test consisted of driving three piles at two sites near the existing East Span alignment. The test sites were located in open water and fell within the Caltrans maintenance area that extends both north and south from the centerline of the existing bridge. Caltrans identified the test sites based on soil conditions and their location within the East Span Project area. Caltrans also considered additional criteria including adequate water depth and minimal potential conflict with other marine vessels or future bridge construction operations.

The PIDP was conducted to determine the minimum hammer energy required to drive piles and to allow engineers to study the pile behavior during driving. The demonstration also allowed engineers to observe the process of welding large pile segments together at the open water sites. This information will allow project engineers to define appropriate construction procedures and equipment requirements for construction of the East Span.

Caltrans monitored and recorded aerial and underwater sound levels during the demonstration to identify possible effects on species such as harbor seals that have a rest area on Yerba Buena Island. Air bubble curtains were used for sound attenuation during pile driving. Caltrans and the National Marine Fisheries Service will use the data to establish mitigation measures that will help minimize potential impacts to marine mammals and to fish during construction of the East Span Project. The results of the PIDP are expected to reduce costs, reduce delays, and aid potential contractors in preparing accurate bids for the skyway and main span portion of the East Span Project

 

8-21-2000

Test pile program is scheduled to begin in late September and continue until early November. It  is an $11.5 million test to determine how best to push supporting piers for the bridge through the 360 feet of muck and sand on the floor of San Francisco Bay to the bedrock below.

Design work is 95% complete on the preferred alternative.

In October the Army Corps of Engineers will come with their report on whether a new bridge should be built or the old one retrofitted.  If the report concludes a new bridge should be built the construction would begin next year with completion in 2005.

 

Suspension Bridge
Picture Provided by Caltrans