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HISTORY
OUR TEAM
AL ZAMPA
GROUNDBREAKING
SUSPENSION BRIDGE DESIGNS
CONSTRUCTION:

YEAR 1 2000-2001

YEAR 2 2001-2002

Tower Tour  July 25, 2002

YEAR 3 2002-2003

Raising the Deck

Year 4,    2003

Completion, Oct/Nov, 2003
  Opening Day, November 8, 2003

BRIDGE TYPES

BRIDGE LINKS

Year 3 - March 2002 - March 2003

April 8, 2002

June 17, 2002

August 5, 2002

September 17, 2002 

January 1, 2003

Raising the Bridge Deck: January, February, March, 2003

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April 8, 2002: Look at the progress so far! This is one of the anchorages on the Crockett side. It's going to have cables attached to it to support the bridge. With the towers and the anchorage done, all we need is the roadbed and the cables! Keep up the good work, bridge builders!

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April 8, 2002: This is a picture of Tower 2 (or as we learned earlier, the tower closest to Crockett). You can't really tell from this picture the work that was done from the last picture, but there's a bit of a difference. Every time we go to see the bridges, we can see how tall the towers are getting. They've even started to tower over the old bridge.

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April 8, 2002: This is Tower 3 or in other words, the Vallejo Tower. The towers are so tall, we can see them from our windows in our Glen Cove houses. You can also see the towers traveling up Glen Cove. When the bridge is completed, Glen Cove dwellers will have a wonderful view.

May, 19th: THE LAST CONCRETE WAS POURED ON THE SOUTH TOWER TODAY!

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June 17, 2002: If you click on the picture and look at the larger view, you might be able to see the crane in between the bridge towers. The crane had a cable attached to it, probably beginning the connections between one tower to the other.  When cables are being run underwater, the waterway needs to be closed to boat traffic.  Just out of range of this picture, a Coast Guard boat was patrolling to make sure no boat traffic would interrupt the work.

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June 17, 2002: We took this picture at the Historical Museum of Crockett. Look at the price! Right now it costs $2 to cross the bridge.

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June 17, 2002: This is the South tower (the one on the Crockett side). Can you see the cables connecting to the anchorage? You probably can't in this small picture but if you click on the picture you can see a larger view and you can see the suspenders.

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August 5, 2002: The footbridge has been completed and cable is arriving on the Vallejo side.  The line of the bridge is visible and it really is starting to look like a suspension bridge.  Beginning the first or second week of September, cable spinning will begin.  Now they are doing practice runs getting ready to spin the 5,084 individual cables that will hold up the bridge.

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August 5, 2002: On the top of the south tower you can see that the cable guides have now been installed.  This picture was taken after we went on a tour to the top of this tower.  You can read all about our tour on our Tour Page.

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August 5, 2002: The other project going on at the same time as the bridge is the Crockett interchange.  Sometimes work on the bridge has to be halted so that work can be done on the roadway above.

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September 17, 2002: Cable spinning ... HAS BEGUN!! Crews are spinning 24 hours a day. The spinning operation is managed on the Vallejo side. When we took these pictures, however, the cable spinning was halted due to difficulties.

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September 17, 2002: It takes 232 wires to make one strand, and 37 strands to make one main cable (there are two main cables) -- that's 13 thousand miles of wire. The wire cable is made of high-tensile steel and was made in England.

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September 17, 2002: The cable is carried across by the cable spinner (as shown here) or "traveler."   The traveler has the brightest paint of any other equipment on the site.  When it is moving, it is quite visible up on the wires. When the cable is being spun the traveler goes back and forth across the bridge span and it carries two strands on each trip. Then the wire is spliced (connected) to make one long continuous wire. A great place to learn about this process is in David Macauley's book, Building Big.  He has great diagrams of the cable spinning process done on the Golden Gate Bridge.

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September 17, 2002: Workers were on the foot bridge checking the wire bundles. Below are pictures of cable spinning equipment.  Engineers are using the CTM (Control Tension Method) of laying cable. It's a computerized method to control how much tension is in each wire. The picture of the tower below is where the counterweights are used to apply tension. All of the spinning equipment was made in Norway and some engineers have come from there to manage this part of the construction.

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September 17, 2002:  We were able to look down into the anchorage on the north side where the cables are attached.  The inside of the anchorage is known as the "splay chamber." Here is where the wires which have been bundled into strands are now separated out and attached to the rods imbedded in the concrete of the anchorage.  By splaying the wires out, the tension caused by supporting the bridge is distributed among all of the wires equally.

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September 17, 2002:  This picture shows the two old truss bridges in the background at about the level that the roadbed on the new bridge will be.  There will be a visitor's overlook here and bicyclists and pedestrians will be able to cross over the new bridge from this point.  The 1927 bridge in the middle will be demolished when the new bridge opens

 

January 1, 2003

The beginning of a new year...the cable spinning process has been completed and the suspender cables are beginning to be hung.  You can see this on the following pictures.  The cable spinning went smoothly and the bridge project is now slightly ahead of schedule with the bridge expected to be open to traffic in late October or early November.  Following the completion of the cable spinning, the cable bundles were compressed with a compaction machine which compressed them into a round shape.  They were then tied with metal bands at even intervals along the cables.  Eventually, they will be wrapped with one continuous cable.  The pictures immediately below were taken on the Vallejo side at the dock of the Golden Bear, the white ship you see to the left of the bridge.  This ship is the training vessel for the California Maritime Academy, a California State University which specializes in maritime engineering, navigation, and other ocean sciences. The school is located right there in Vallejo.

Click on the pictures to see them larger.

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These pictures were taken from the Crockett side of the bridge.  The construction site was idle as workers celebrated New Years Day--and all their hard work, of course.

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The separate project going on at the same time as the bridge construction is the major construction of the bridge off ramp and approach in Crockett.  Here, you can see the progress being made there.
Here you can see the support work underneath the bridge approach.  Work on both projects has to be carefully coordinated so that workers are safe and don't have tools and equipment dropping on them.

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You can see from these shots that the cables have been completed and are now attached to the anchorages.

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Imagine that the bridge deck is attached to these cables.  The deck will be parallel to the deck of the existing bridges in the background.  Remember that the truss bridge closest in this picture will be demolished, leaving two very different-looking bridges, one a cantilever design, and one a suspension. wpe31.jpg (37777 bytes)
January 25th Update: The suspender cables have been hung and the next big phase of the bridge construction is set to begin: the roadbed or deck is about to be suspended!!!  In fact, this morning, the first sections have arrived and crossed under the Golden Gate Bridge.  They made the long voyage across the Pacific Ocean beginning on January 4th, when they left the docks in Japan close to the construction site where they were built. The first of the huge 120 by 95 foot sections is slated to be raised into place January 30th. This first piece will be connected to the center of the bridge.  Jacks that are hanging from the main cables will be attached to the deck section on the transport ship and a coiler will lift it into place.  Workers will then attach it to the suspender cables.  The deck will be made up of 24 sections in all, and will come from Japan in 3 shipments.  The next boat should arrive in late February and the final one in March--three years after we began our project at the groundbreaking ceremony.

You can view the draft plans for the deck sections by following this link:   Draft Plans

January 29, 2003: The deck pieces have arrived from Japan and the huge ship is docked off of the city of Rodeo, waiting to make its way up the San Francisco Bay to the construction site.  The ship is carrying 8 sections of the bridge deck as you can see. To get a sense of the size of the ship, to the left of the flagpole, you can make out in the distance the Vallejo Ferry. This ferry carries passengers between Vallejo and San Francisco every day.  The trip takes about 55 minutes.  Many commuters get to work this way, but many more will cross the new bridge and head into congested traffic.

For details about raising the deck go to:

 Raising the Bridge Deck: January, February, March, 2003

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