<< <i>Isn't there a new bay bridge being built? Are they going to demo the existing bridge? >>
We’re Making Your Bridge Safer On October 17, 1989, when a 250-ton section of the upper deck of the East Span collapsed during the 7.1-magnitude Loma Prieta earthquake, the entire Bay Bridge was temporarily closed for repairs. Within a month, the East Span was reopened, but the bridge failure raised an essential question. How could the Bay Bridge – an important regional lifeline structure – be bolstered to withstand the next major earthquake? To enable it to reopen its decks within 24 hours after a major earthquake, should it be rebuilt, repaired, or both?
The answer came after an exhaustive study was performed by seismic experts from around the world. In order to make each of the separate elements seismically safe on a bridge of this size, the work must be divided into numerous projects, each presenting unique challenges, with one major challenge common to all. Each of these projects must be performed as the bridge continues to serve 280,000 vehicles a day! Visit other pages within this website to learn more about the individual projects.
It was decided that the twin suspension bridges of the West Span (near San Francisco) required extensive retrofit work. The work on the West Span, completed in 2004, involved bolstering the span with massive amounts of steel, concrete, bolts, and the application of new seismic safety technology. Work on the West Approach, a one-mile section of I-80 in San Francisco, involves completely demolishing existing structures and building new ones, one section at a time, as traffic continues to flow. Much of this work occurs within feet (or inches!) of residential and commercial buildings.
The studies also concluded that rather than a retrofit, the two-mile East Span needed to be completely rebuilt. When completed in 2013, the new East Span will consist of several different sections, but will appear as a single, streamlined span. The new span will feature the world’s longest Self-Anchored Suspension Span (SAS), connected to a roadway on piers (Skyway), which will gradually slope down towards the Oakland shoreline (Oakland Touchdown).
The east- and westbound lanes of the East Span will no longer be configured as upper and lower decks. The lanes will be parallel to each other and will provide motorists with more expansive views of the Bay Area. The new span will be aligned north of the existing bridge to allow traffic to continue flowing on the existing bridge as the new span is built. The new YBI Transition Structure will connect the SAS to the YBI tunnel and will transition side-by-side traffic to the upper and lower decks of the tunnel and the West Span.
When construction of the new East Span is complete and vehicles have been safely rerouted to it, the existing East Span will be demolished.
A Collaborative Effort Projects of this magnitude require the involvement of numerous federal, state, and regional agencies, as well as neighborhood and community groups and individuals.
The Toll Bridge Program Oversight Committee (TBPOC) would like to express its gratitude to all of these stakeholders, for their continued support as this essential work moves forward. We hope that this website will serve as a useful vehicle for obtaining current information about the Bay Bridge.
Bay Bridge halves are quite common in grades AU-50 through MS-64. Even in MS-65 it is fairly plentiful, while MS-66 coins are smaller in number. This issues’s availability in higher grades is very slim. Grading centers mostly on the coin’s obverse, as its reverse is such a “busy” design that flaws will rarely be noticeable. Luster ranges from dull and satiny (most commonly seen) to intense and satiny (scarce). The obverse is frequently more lustrous than the reverse, due to differences in die preparation. Because of its large distribution to the general public, many specimens are worn or show other signs of mishandling. Check for wear on the bear’s left shoulder and the hills above the bridge.
>>
Just for clarification, these two pics from above are of the Golden gate Bridge, not BB, construction. That structure is a Civil War era fort.
A bit of trivia-The Golden Bear, or California grizzly, which is on the BB, CA sesqui, and San Diego commems is an extinct subspecies. Its also on the CA state flag-CA isthe only state with an extinct animal as its symbol. The last wild California Grizzly was shot in 1922.
Comments
“In matters of style, swim with the current; in matters of principle, stand like a rock." - Thomas Jefferson
My digital cameo album 1950-64 Cameos - take a look!
Dan
First Place Winner of the 2005 Rampage design contest!
This particular commemorative issue is in my top 5 favorites of early commems, colorfully toned of course!
Collector of Early 20th Century U.S. Coinage.
ANA Member R-3147111
Coin's for sale/trade.
Tom Pilitowski
US Rare Coin Investments
800-624-1870
Keep it up
btw,
Isn't there a new bay bridge being built?
Are they going to demo the existing bridge?
.
CoinsAreFun Toned Silver Eagle Proof Album
.
Gallery Mint Museum, Ron Landis& Joe Rust, The beginnings of the Golden Dollar
.
More CoinsAreFun Pictorials NGC
Very professional.
"If I say something in the woods and my wife isn't there to hear it.....am I still wrong?"
My Washington Quarter Registry set...in progress
From the FatMan Collection:
<< <i>Amazing as always... >>
Gorgeous toning on that Bay Bridge, Lee.
Fatman, a beautiful toner, WOW!!
<< <i>Isn't there a new bay bridge being built?
Are they going to demo the existing bridge? >>
We’re Making Your Bridge Safer
On October 17, 1989, when a 250-ton section of the upper deck of the East Span collapsed during the 7.1-magnitude Loma Prieta earthquake, the entire Bay Bridge was temporarily closed for repairs. Within a month, the East Span was reopened, but the bridge failure raised an essential question. How could the Bay Bridge – an important regional lifeline structure – be bolstered to withstand the next major earthquake? To enable it to reopen its decks within 24 hours after a major earthquake, should it be rebuilt, repaired, or both?
The answer came after an exhaustive study was performed by seismic experts from around the world. In order to make each of the separate elements seismically safe on a bridge of this size, the work must be divided into numerous projects, each presenting unique challenges, with one major challenge common to all. Each of these projects must be performed as the bridge continues to serve 280,000 vehicles a day! Visit other pages within this website to learn more about the individual projects.
It was decided that the twin suspension bridges of the West Span (near San Francisco) required extensive retrofit work. The work on the West Span, completed in 2004, involved bolstering the span with massive amounts of steel, concrete, bolts, and the application of new seismic safety technology. Work on the West Approach, a one-mile section of I-80 in San Francisco, involves completely demolishing existing structures and building new ones, one section at a time, as traffic continues to flow. Much of this work occurs within feet (or inches!) of residential and commercial buildings.
The studies also concluded that rather than a retrofit, the two-mile East Span needed to be completely rebuilt. When completed in 2013, the new East Span will consist of several different sections, but will appear as a single, streamlined span. The new span will feature the world’s longest Self-Anchored Suspension Span (SAS), connected to a roadway on piers (Skyway), which will gradually slope down towards the Oakland shoreline (Oakland Touchdown).
The east- and westbound lanes of the East Span will no longer be configured as upper and lower decks. The lanes will be parallel to each other and will provide motorists with more expansive views of the Bay Area. The new span will be aligned north of the existing bridge to allow traffic to continue flowing on the existing bridge as the new span is built. The new YBI Transition Structure will connect the SAS to the YBI tunnel and will transition side-by-side traffic to the upper and lower decks of the tunnel and the West Span.
When construction of the new East Span is complete and vehicles have been safely rerouted to it, the existing East Span will be demolished.
A Collaborative Effort
Projects of this magnitude require the involvement of numerous federal, state, and regional agencies, as well as neighborhood and community groups and individuals.
The Toll Bridge Program Oversight Committee (TBPOC) would like to express its gratitude to all of these stakeholders, for their continued support as this essential work moves forward. We hope that this website will serve as a useful vehicle for obtaining current information about the Bay Bridge.
unique commemorative.
.
CoinsAreFun Toned Silver Eagle Proof Album
.
Gallery Mint Museum, Ron Landis& Joe Rust, The beginnings of the Golden Dollar
.
More CoinsAreFun Pictorials NGC
Alway enjoy these Lee, thanks.
Fatman, beautiful BB.
<< <i>
Bay Bridge halves are quite common in grades AU-50 through MS-64. Even in MS-65 it is fairly plentiful, while MS-66 coins are smaller in number. This issues’s availability in higher grades is very slim. Grading centers mostly on the coin’s obverse, as its reverse is such a “busy” design that flaws will rarely be noticeable. Luster ranges from dull and satiny (most commonly seen) to intense and satiny (scarce). The obverse is frequently more lustrous than the reverse, due to differences in die preparation. Because of its large distribution to the general public, many specimens are worn or show other signs of mishandling. Check for wear on the bear’s left shoulder and the hills above the bridge.
>>
Just for clarification, these two pics from above are of the Golden gate Bridge, not BB, construction. That structure is a Civil War era fort.
A bit of trivia-The Golden Bear, or California grizzly, which is on the BB, CA sesqui, and San Diego commems is an extinct subspecies. Its also on the CA state flag-CA isthe only state with an extinct animal as its symbol. The last wild California Grizzly was shot in 1922.
This is what the new East span will look like:
Here's a recent side by side shot
Guess that other thread with the lis of Lee G threads needs to be updated.
<< <i>Alway enjoy these Lee, thanks.
Fatman, beautiful BB.
Just for clarification, these two pics from above are of the Golden gate Bridge, not BB, construction. That structure is a Civil War era fort. >>
Thanks for the help!