| Lafayette Bridge | |
|---|---|
Picture of the Lafayette Bridge taken in early spring, 2006. |
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| Official name | Lafayette Street Bridge |
| Carries | Four lanes of U.S. Route 52 |
| Crosses | Mississippi River |
| Locale | St. Paul, Minnesota |
| Maintained by | Minnesota Department of Transportation |
| ID number | 9800 |
| Design | Plate girder bridge |
| Total length | 3375 feet |
| Width | 67 feet |
| Longest span | 362 feet |
| Clearance below | 51 feet |
| Opened | 1968 |
The Lafayette Bridge is a bridge carrying U.S. Route 52 across the Mississippi River in downtown St. Paul. At this point, US 52 is on the Lafayette Freeway. The bridge spans across railroad yards north of the Mississippi, the river itself, and industrial areas south of the Mississippi. The Lafayette Bridge is one of the longest Mississippi River bridges in the Twin Cities.
An earlier bridge on Lafayette Street, built in 1905 by C.A.P. Turner, was removed to make room for the Lafayette Bridge. The 1905 bridge spanned the Soo Line railroad tracks, not the river itself. This was an experimental bridge of Turner's design, being a flat slab resting on mushroom-capped columns for support. The existing Lafayette Bridge was constructed during the 1960s and opened to traffic in 1968.
In the aftermath of the collapse of the I-35W Mississippi bridge in Minneapolis, the Lafayette Bridge was cited as another bridge in Minnesota with insufficient redundancy—a so-called "fracture critical" structure which could collapse with the failure of just a single support element.[1] The Lafayette bridge currently undergoes an in-depth, annual bridge inspection using special procedures for inspecting fracture critical bridges. A consultant inspection in 2007 reported the overall condition of the structure as fair, with only minor repairs and spot painting recommended. This work was done in 2008. The annual Mn/DOT inspections also report the overall condition of the bridge as fair, and that the bridge is satisfactory for public use. The most recent inspection was carried out in September 2010 and found no significant problems. The bridge nearly collapsed in 1975 after a large crack in a main beam caused a 7-inch (180 mm) dip to form at the road surface. It was temporarily closed to traffic as that damage was repaired. The Lafayette Bridge was already scheduled to be replaced in 2011 before the I-35W bridge collapse occurred in 2007.[2] That event did not impact the replacement schedule, which began in January 2011. It will be complete sometime in 2014. When completed, the two new bridges (northbound and southbound) each will provide two through-lanes and an auxiliary lane in each direction for entering and exiting traffic. The project also includes replacement of the Hwy 52 bridges over I-94 and redecking of the Hwy 52 bridges spanning Plato Avenue south of the Mississippi River. A pedestrian and bicycle crossing over the river is included in the plans. The project limits stretch along Hwy 52 from East Seventh Street to just south of Plato Avenue. Lunda Construction Company of Black River Falls, Wisc. is the prime contractor for the $130.4 million project. While the current Lafayette Bridge is a safe structure to use, it is nearing the end of its designed life. The bridge’s age and current condition are driving the planned replacement. [3]
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http://www.dot.state.mn.us/metro/projects/hwy52-stpaul/index.html
http://www.dot.state.mn.us/metro/projects/hwy52-stpaul/index.html