Friday, April 28, 2017

US-17 over Cooper River in Charleston County, SC

(2005 Bridge Hunter (Arthur J Ravenel Jr.), 1966 Bridge Hunter (Silas S Perman), 1928 Bridge Hunter (John P Grace), HAER3D Satellite)

The Arthur J. Ravenel Jr. Bridge is the longest cable-stayed bridge in America and replaces both of the predecessor cantilever truss bridges. [Bridge Hunter]

Jake Jones posted
Charleston SC 6-18-2015
Photo by Andrew Penik from Bridge Hunter
All three, 1928, 1966, 2005
[From right to left]




Skip to 1:05.


Update: Below are three of the 295 photos posted by Robert Reeder. We see above that they used explosives to drop the suspended span of the older, skinnier 1928 Bridge into the shipping channel. But Robert's photos shows that they carefully jacked down the suspended span of the 1966 truss onto a barge. Were the bridges too close together to risk using explosives to remove the first span? Or would it take too long to clear the wider truss out of the shipping channel? Or both?

Robert's comment:
https://www.facebook.com/media/set/… This is a bridges we took down in Charleston S.C 2 2250s and 888 2250s had 280ft of boom 888 had 260ft of boom good job also did an 870 ton lift with strand jacks and other bridge next to it was 760 ton no tandem lifts on water had both black smoking no weights for steel cause it was beefed up over the years many times grace built in 1928 Pierman built in 1955.
According to Bridge Hunter, Pierman was built in 1966 instead of 1955. Grace was widened in 1959. Arthur began in 2001 and the traffic was transferred to it July 16, 2005. The demolition was completed in 2007. [Bridge Hunter timeline written by Nick Brnot.]

a

b

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According to Bridge Hunter, Pierman was built in 1966 instead of 1955. Grace was widened in 1959. Arthur began in 2001 and the traffic was transferred to it July 16, 2005. The demolition was completed in 2007. [Bridge Hunter timeline written by Nick Brnot.]

So I set the "time machine" in Global Earth to 2005:
Google Earth with the "Roads" Layer turned off so that you can see the new bridge.



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