Friday, December 6, 2024

1973 Foresthill Bridge near Auburn, CA, has T-1 Steel

(Archived Bridge Hunter; no Historic Bridges; Satellite, 604 photos)

"It is the highest bridge by deck height in California, the fourth highest in the United States, and among the seventy highest in the world at 730 feet (220 m) above the river." [geo]

Street View, Feb 2021

Trail View, Dec 2023
 
SierraNevadaGeotourism, Darin Pointer - www.ffgphotos.com
"The 2,428 foot [.74km] long span, with piers only 16 feet shorter than those of the San Francisco Golden Gate Bridge, was built at a cost of $13 million by the Bureau of Reclamation." [This text appears in quite a few of the sources. I don't know who actually wrote it.]

placer
"Inspection work is slated to begin later this [2024] summer and continue through Spring of 2025."
[It will be interesting to see how many problems they find.]
 
262 welds need detailed ultrasonic testing. This video also has some background information as to why T-1 steel for bridges has proven to be a problem. The testing is expected to exceed $6.9m and take 6-9 months. The average daily traffic count is 20,000, which is low enough that two lanes of traffic should be able to accommodate it. The bridge is so high because it was built for the Auburn Dam project that never happened.
12:00 video @ 9:47

This video has a weld count of 282 welds. It looks like it is the source of some of the material in the above video.
2:00 video

The 2002 xXx movie scene in which Vin Diesel drove a Corvette off this bridge.
Video

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