Tuesday, June 16, 2015

Ruby Street Bridge, Joliet, IL

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(Flickr Album, Bridge Hunter, Historic Bridges, Satellite) Update: The Illinois Flickr Album contains some more pictures of this bridge.

The Ruby Street Bridge is the only fixed trunnion design in Joliet. This view is of the leaves going down after the 3-barge tow passed under. Note that you can see the Sante Fe I&M Canal Bridge and on each side of that bridge you can see the towers of the CN/EJ&J Des Plaines River Bridge. I then switched to a video of the bridge going down. I also caught portal videos of the bridge going up and going down. And an elevation view of it going up.

Vxla also as a set of pictures that includes interior shots.

This bridge is representative of the Chicago design of the fixed trunnion drawbridge. It is not a through truss nor a deck truss, but a pony truss. That is, the truss has elements above and below the deck. Another characteristic of the Chicago design is that the upper chord is curved. I took the following shot to catch the Santa Fe container train, but it also captures the truss in the middle of the bridge. Having part of the truss above the deck not only increases the clearance under the bridge, it provides a heavy-duty barrier between vehicle and pedestrian traffic.

The above view and this one illustrates that Joliet has done a good job of preserving the historic handrails.

While I was out near the middle of the bridge taking the following picture, a semi-truck went across the bridge, and I got a brief flash of terror as the bridge leaf bounced down and up. Earthquakes don't bother me because the movement is sideways. But my brain does not like the "ground" going down.

When I noticed the Jefferson Street Bridge was up and that the Cass Street Bridge was going up, I trotted back to the car to go to the Jackson Street Bridge in the foreground to catch the tow that was causing the bridges to go up.

Another grab of the Santa Fe container train from the middle of the bridge also caught the bridge tender house.

Later, from the Jackson Street Bridge, I caught an 11-barge tow going upstream. There are more pictures at the Flickr link at the beginning of this post.

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