National Boards > Bridges
Bridges replaced directly next to the old one
SteveG1988:
--- Quote from: Dirt Roads on January 17, 2023, 04:50:51 PM ---https://www.google.com/maps/@38.4438556,-81.8398407,3a,15y,316.29h,93.01t/data=!3m6!1e1!3m4!1sa8R7_TyG_tLom4z8hQPCYQ!2e0!7i16384!8i8192
The old "Green Bridge" over the Kanawha River on I-64 in Putnam County, West Virginia now has its main span removed. I was amazed how close the new structure is to the old structure. Locals named the old bridge the "Stinky Bridge", as a reference to the small chemical plant in Nitro next to the Interstate that stored Mercaptan, the main additive to natural gas. Didn't take much of that to "raise a stink".
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Huh, the project moved fast.
nexus73:
https://www.oregon.gov/odot/Projects/pages/project-details.aspx?project=18578
SR 38 in Oregon had the Scottsburg Bridge replaced with one built adjacent to it. This allowed for a sharp curve on the north end to be smoothed out considerably. Unique feature: The new bridge has lighted concrete pylons on each end to let motorists know they are present when visual conditions are not at their best.
Rick
Dirt Roads:
--- Quote from: Dirt Roads on January 17, 2023, 04:50:51 PM ---https://www.google.com/maps/@38.4438556,-81.8398407,3a,15y,316.29h,93.01t/data=!3m6!1e1!3m4!1sa8R7_TyG_tLom4z8hQPCYQ!2e0!7i16384!8i8192
The old "Green Bridge" over the Kanawha River on I-64 in Putnam County, West Virginia now has its main span removed. I was amazed how close the new structure is to the old structure. Locals named the old bridge the "Stinky Bridge", as a reference to the small chemical plant in Nitro next to the Interstate that stored Mercaptan, the main additive to natural gas. Didn't take much of that to "raise a stink".
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--- Quote from: SteveG1988 on January 18, 2023, 01:39:06 AM ---Huh, the project moved fast.
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Oops, I goofed. This is technically not the correct thread, as the DOH will soon replace the old structure with a new parallel structure to create twin bridges as part of the widening project.
Rick Powell:
--- Quote from: JKRhodes on September 29, 2019, 11:46:39 PM ---
--- Quote from: jeffandnicole on September 29, 2019, 09:56:02 AM ---Yep, this is done quite often. When the roadway is slightly shifted to the new bridge, it can often be done so that most motorists aren't even aware of the slight shift.
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This works well if the road is already somewhat curved. In my lifetime I've seen several bridges replaced in Arizona; the majority of them are on a straight stretch of road. The jog, while not hard to navigate, is pretty obvious. This tends to be amplified due to the fact that the newer bridges tend to have wider decks to accommodate more lanes, shoulders, sidewalks and other safety features. .
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However, by the time a third bridge is needed to replace the second, it can often go back on or near the original alignment, straightening things out again. The IL 178 Bridge in North Utica IL is an example of this.
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