North Avenue Bridge
| North Avenue Bridge | |
|---|---|
North Avenue Bridge from Goose Island
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| Coordinates | 41°54′39″N 87°39′25″W / 41.9108°N 87.6569°WCoordinates: 41°54′39″N 87°39′25″W / 41.9108°N 87.6569°W |
| Carries | 4 lanes of North Avenue ( IL 64), 2 sidewalks |
| Crosses | North Branch of the Chicago River |
| Locale | Chicago, Illinois |
| Official name | North Avenue Bridge |
| Characteristics | |
| Design | Hybrid suspension/cable-stayed |
| Total length | 420 ft (128 m) |
| Width | 78.5 ft (23.9 m) |
| Height | 50 ft (15 m) |
| Longest span | 252 ft (77 m) |
| Clearance below | 18 ft (5 m) |
| History | |
| Construction begin | Mid-June, 2006 |
| Construction end | May 23, 2008 |
| Opened | May 23, 2008 |
| Statistics | |
| Daily traffic | 40,000 |
The North Avenue Bridge can refer to one of three bridges that has carried North Avenue (Illinois Route 64) over the North Branch of the Chicago River on the north side of Chicago, Illinois. A center-pier swing bridge built in 1877 was replaced in 1907 by a bascule bridge, allowing river traffic more room for maneuvering in and out of the North Canal, just north of Goose Island.
Due to deteriorating conditions and undercapacity, the bascule bridge was torn down in 2006 to make room for a hybrid suspension/cable-stayed bridge. The suspension/cable-stayed bridge fully opened on May 23, 2008.
As Chicago grew into a center of industry and commerce in the late 19th century, numerous fixed-span crossings were replaced by center-pier swing bridges, the most common type of bridge that allowed pedestrians and wagons to cross the Chicago River while also periodically allowing ship traffic below. In 1877, one of these bridges was constructed just north of Goose Island.
The 1877 bridge and its counterparts, while the most common bridge of the mid-19th century, were criticized by both the shipping and real estate industries of Chicago. As the 19th century came to a close, shipping vessels had grown larger, and the swing bridges' center piers had become navigational hazards. In addition, each swing span required a large clearance around the bridge, preventing the development of docking facilities near the bridge. As open land along the Chicago River grew scarce, real estate and shipping companies grew increasingly critical of the swing spans.
No progress was made on the issue until 1890, when the United States Congress gave the United States War Department the authorization to build new bridges over waterways, and to force changes to existing bridges that posed a hazard to navigation. In 1892, the directive was enforced in Chicago when a just-completed bridge at Canal Avenue was ordered removed by the U.S. Army Corps of Engineers. That year, the city's engineers began to study suitable alternatives to the hazardous swing-span bridge.
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Wikipedia