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Old October 20th, 2010, 06:59 AM   #1
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New Tappan Zee Bridge

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WTF? Tarrytown Lighthouse by jeffs4653, on Flickr


The current Tappan Zee Bridge in New York is 45 years old and talk of a replacement is going around.

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2 designs remain for new Tappan Zee Bridge



NEW CITY — There still isn't any money to replace the aging Tappan Zee Bridge but there are now two final designs for what the new bridge might look like.

One is a single-level span that would have room for trains to run in the middle, with bus lanes on either side of the tracks, and car and trucks traveling in the outer lanes (Plan 3, above).

The second design is a dual-level bridge (Plan 5, above). Trains would run underneath the north span. Vehicle traffic would be on the top level, with two dedicated bus lanes in the center. Because it would have fewer support structures than the single-level span, 66 compared with 118, it would take less time to construct.

Michael Anderson, leader of the Tappan Zee Bridge/Interstate 287 Corridor Project, unveiled the recommendations Friday in New City.

He said the two designs were narrowed from six options by the project's consultants — Earth Tech/AECOM, AECOM and Ove Arup, all of Manhattan — because they had the shortest construction times, lowest costs to build and the least environmental impact to the Hudson River. They also offered the greatest transportation flexibility and provided the safest emergency access.

"We haven't made any hard and fast decisions," Anderson said. "We're going to take these recommendations into consideration as we advance the DEIS (draft environmental impact statement)."

A new span to replace the soon-to-be 55-year-old Tappan Zee Bridge is just one part of the $16 billion project. It also would add bus rapid transit from Suffern to Port Chester along 30 miles of Interstate 287 and would call for the construction of a new passenger rail line across Rockland, over the new bridge and into Westchester onto Metro-North Railroad's Hudson Line, ending at Grand Central Terminal in Manhattan.

A new bridge with highway improvements in Rockland would cost $8.3 billion (the bridge alone is $6.4 billion); bus rapid transit would run $1 billion; and the rail line would cost $6.7 billion in 2012 dollars.

The two final bridge recommendations, as well as the transit and highway improvements that were unveiled Friday, will be analyzed in the environmental review, which is due to be finalized early next year.

The state Department of Transportation is the lead agency and is supported by the state Thruway Authority and the Metropolitan Transportation Authority's Metro-North Railroad.

During the 3 1/2-hour meeting, project officials also said they were continuing to work on financing for the project but had secured no firm commitments.

Each of the bridge designs shares traits: four lanes in each direction; two dedicated bus lanes; safety shoulders; two railroad tracks (or the space to add them later); and a shared-use pedestrian and bicycle path on the north side of the span.

Anderson said in the case of the single-level span, where the train would run in its center, the tracks could be built at a later date in segmented sections at night, much like the ongoing deck replacement on the Tappan Zee Bridge.

The new bridge would be built about 400 feet north of the old one, and connect to the Thruway in the same places it does now.

The new bridge also would rise gradually to the midspan, unlike the current bridge, which features a steep grade to its highest point. That slope leads to many problems, Anderson said.

"We have determined that heavy trucks coming up this 3 percent grade ... results in a reduction of speed by about 15 mph," he said. "That is not good for traffic flow and probably contributes to a number of accidents."

It's also necessary to have a relatively flat grade in order for the trains to travel on the bridge.

Anderson spoke before more than 60 residents, politicians and transportation officials in New City at a meeting organized by Rockland County Legislature Chairwoman Harriet Cornell.

She has held similar summits on the project for the past six years.

Philip Ferguson, the head of the project's finance team, reported that it was focusing on the first phase of the project, namely securing $8.3 billion for the new bridge and highway improvements. It was looking at both "traditional and innovative" financing options, and said that it would require multiple funding sources.

Martin Robins, a transportation consultant who is working with the Rockland Legislature, said the cancellation of the New York-New Jersey rail tunnel project due to cost overruns proves how "brittle" the financing of public works projects are today.

"It just underscores the difficulty New York state DOT is having in 2010" in putting together a financing package, Robins said.
Link: http://www.lohud.com/article/201010160342



http://www.hdrinc.com/portfolio/tapp...bridge-project

Last edited by desertpunk; December 10th, 2013 at 08:09 AM. Reason: updates
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Old October 20th, 2010, 07:02 AM   #2
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The current bridge, which carries I-87 and I-287 and connects Westchester and Rockland Counties of New York.


http://home.fuse.net/ard/jandress/Ta...eFromBelow.jpg



http://mlibby.net/boston2004/pictures/tappan_zee.jpg
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Old October 20th, 2010, 07:21 AM   #3
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The bridge doesn't really look to be in too bad of shape, what's wrong with it exactly?
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Old October 20th, 2010, 07:33 AM   #4
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It deals with more traffic than it was designed for, might have been made with inferior material, and has a lifetime of 50 years.
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Old October 20th, 2010, 02:53 PM   #5
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Yes, it was built during the Korean War, and the materials of that time was of inferior quality.

$ 1 billion for just a number of bus lanes is an awful lot of money, I don't think you can ever justify that, especially considering there will also be a rail facility across the bridge.
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Old October 20th, 2010, 03:14 PM   #6
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Its not Earthqauke proof , its over Capacity. Its not safe , no shoulders. There are always accidents on that bridge. Bus Rapid Transit isn't really needed , Rail is very needed. Idk , why it would cost 1 billion to construct bus lanes smells like typical New York corruption.
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Old October 20th, 2010, 04:19 PM   #7
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if u take a good look on the second pic, there's a lot of rust on the construction,..seems to me a bit tacky and seems to me bad maintained
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Old October 21st, 2010, 05:48 AM   #8
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They should just go for Plan 3. The current bridge is a cantilever bridge, it is unknown what the new bridge's type is.
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Old October 22nd, 2010, 01:03 AM   #9
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Quote:
Originally Posted by Jim856796 View Post
They should just go for Plan 3. The current bridge is a cantilever bridge, it is unknown what the new bridge's type is.
why? type 5 has RR in it and I am for building mass transit as much as possible. ARC tunnel is canceled and I hope that his one at least have some compensation for it.
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Old October 22nd, 2010, 01:04 AM   #10
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I like plan 5... easier to me it seems...
although plan 3 is cleaner...
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Old October 22nd, 2010, 07:39 AM   #11
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I prefer Plan-3 just because it looks more "spacious "
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Old October 24th, 2010, 09:32 PM   #12
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Originally Posted by I-275westcoastfl View Post
The bridge doesn't really look to be in too bad of shape, what's wrong with it exactly?
The pilings that support the bridge are made of wood. They are being eaten by ship-worms. There weren't any ship-worms for a long time due to pollution but now that the Hudson is cleaner they along with other types of sea life have returned.
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Old October 26th, 2010, 02:20 AM   #13
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Wow thats crazy who's bright idea was it to use wood pilings on such a bridge..
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Old October 26th, 2010, 03:28 AM   #14
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Wow thats crazy who's bright idea was it to use wood pilings on such a bridge..
there alot of Bridges with Wood pilings around here and even wooden Railway bridges..
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Old October 28th, 2010, 05:52 AM   #15
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I like Plan 3 but both are great.
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Old October 28th, 2010, 07:07 PM   #16
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there alot of Bridges with Wood pilings around here and even wooden Railway bridges..
I know its an old method but by that time I would think they had better methods to use. They should make that bus lane an express toll/HOV lane at least get some money back from it, what a waste.
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Last edited by I-275westcoastfl; October 28th, 2010 at 07:13 PM.
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Old October 28th, 2010, 09:47 PM   #17
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Wood piles will be conserved as long as they remain under water. I believe a lot of piling in Amsterdam and Venezia is wood.
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Old November 3rd, 2010, 04:00 AM   #18
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Wood piles will be conserved as long as they remain under water. I believe a lot of piling in Amsterdam and Venezia is wood.
It used to be that the river was polluted enough that it killed off the wood borers that would eat through wooden pilings. Now that the river is cleaner, the wood borers are coming back. This has been a problem for some of the old piers around Manhattan.
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Old November 22nd, 2010, 04:58 AM   #19
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I can't decide. Both are equally good, though Plan 5 would allow for easy subway expansion on the other portion of the bridge.
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Old December 22nd, 2010, 10:03 PM   #20
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Quote:
Originally Posted by ChrisZwolle View Post
Yes, it was built during the Korean War, and the materials of that time was of inferior quality.

$ 1 billion for just a number of bus lanes is an awful lot of money, I don't think you can ever justify that, especially considering there will also be a rail facility across the bridge.
Things in America are just expensive due to labor and high material prices (low and antiquated production) I prefer 3.
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