Tuesday, March 31, 2015

Shasta County, California Bridges: Pit River Bridge

May 2014 (40.7601 Degrees, -122.3182 Degrees) Pit River Bridge
The Pit River Bridge is a 1094 ft long double deck truss with a highway (I-5) on top and a railway (Southern Pacific) on the bottom. It was built in 1941 as part of the Shasta Dam Project. There's an excellent article on this impressive bridge on Eric Sakowski's Highest Bridges website. The only additional information that I have is that Caltrans was approached by California's Department of Water Resources (DWR) a few years ago to take ownership of this bridge. However, the bridge has never had a seismic retrofit and so Caltrans insisted that the bridge had to be safe for earthquakes before they could take it. Moreover, Caltrans told DWR that they would design the retrofit at what seemed a very high cost, and this was met with some consternation by DWR. However, they are both state agencies and so there is no actual cost to the state.
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Shasta County, California Bridges: Pit River Bridge by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Monday, March 30, 2015

Shasta County, California Bridges: Doney Creek Bridges

March 2015 (40.88233 Degrees-122.38797 Degrees) Doney Creek Bridges
Just west of the old Antlers Bridge are two bridges at the mouth of Doney Creek. The bridge in the foreground is a Southern Pacific Railroad (deck truss) Bridge. Just behind it is a pretty arch bridge (6C0052) carrying Lakeshore Drive over Doney Creek. The highway bridge was built in 1927 by Harlan D. Miller. It includes a 182 ft long spandrel arch main span. Both bridges had to be raised when Shasta Dam was built across the Sacramento River in 1940. Of course, after several years of drought, the creek is close to its original elevation.

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Shasta County, California Bridges: Doney Creek Bridges by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Sunday, March 29, 2015

Shasta County, California Bridges: Antlers Bridges (4)

March 2015 (40.8808 Degrees, -122.3811 Degrees) Antlers Bridges
A view of the four segments of the new Antlers Bridge. Hopefully one day they will be joined together to create a single bridge. However, this project started back in 2008 and it probably won't be completed until sometime in 2016.

There are some projects that are a joy to work on, where the contractor has no other objective than to build the best bridge they can. Then there are projects where the contractor severely underbids their competitors in the hope they can make their money back by finding issues they can exploit with change orders.

I started work in bridge construction over 30 years ago in Riverside County. The best, most reasonable contractor in the 1980s was Kaiser Construction. They were such a pleasure to work for that every year the structure reps, resident engineers, and bridge inspectors in District 8 would give a dinner for them as a token of our appreciation.
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Shasta County, California Bridges: Antlers Bridges (4) by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.