Des Plaines River Valley Bridge
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| Des Plaines River Valley Bridge | |
|---|---|
 Des Plaines River Valley Bridge during Roll the Tollway ceremonies on November 11, 2007. |
|
| Carries | 6 lanes of I-355 |
| Crosses | Des Plaines River, Illinois and Michigan Canal, Sanitary and Ship Canal, several railroad lines, Bluff Road, New Avenue, and a forest preserve |
| Locale | Lemont, IL |
| Maintained by | Illinois State Toll Highway Authority |
| Design | Post-tensioned concrete girder |
| Total length | 1.3 miles (2.1 km)[1] |
| Opening date | November 12, 2007 |
The Des Plaines River Valley Bridge is a post-tensioned concrete girder bridge in the northeastern portion of the U.S. state of Illinois. It carries Interstate 355 over the Des Plaines River, the Chicago Sanitary and Ship Canal, the Illinois and Michigan Canal, several railroad lines, Bluff Road, New Avenue and a forest preserve. The bridge is 1.3 miles (2.1 km) long.[1]
The bridge consists of 34 piers from 10 feet (3 m) to 75 feet (23 m) in height. A lower level bridge was also built for maintenance purposes, and to carry a bicycle trail that will connect other bicycle trails in the area.[1] The total height of the bridge ranges from 80 feet (24 m) to 100 feet (30 m). The height of the bridge allows the endangered Hine's Emerald Dragonfly to fly safely beneath the bridge, away from the flow of traffic.[2]
