Main Channel Bridge (Winona)
|Main Channel Bridge|
|Owner||Minnesota Department of Transportation|
|Design||Steel cantilever bridge / Concrete box girder|
|Total length||2,288 Feet|
|Width||31 Feet: 2 automobile lanes (cantilever span) / 50 Feet, 4 inches: 2 automobile lanes plus pedestrian/bicycle path (concrete box girder span)|
|Longest span||138 m|
|Construction start||1941 (cantilever span) / July 2014 (concrete box girder span)|
|Construction end||November 1942 (cantilever span) / August 2016 (concrete box girder span)|
|Opened||November 21, 1942 / August 27, 2016|
Main Channel Bridge (Winona) consists of a pair of bridges, the original cantilever bridge, and a concrete box girder bridge completed in 2016, that span the main channel of the Mississippi River in the United States between Winona, Minnesota and Latsch Island. Another bridge, the North Channel Bridge, connects the island to rural Buffalo County, Wisconsin. The bridge carries Minnesota State Highway 43, which continues as Wisconsin Highway 54 at the Minnesota/Wisconsin state line on the nearby North Channel Bridge; in Winona, it connects to Winona Street.
Construction on the original cantilever bridge was started just before the U.S. entered World War II, and the construction was hastened to finish in November 1942, despite labor shortages, difficulty obtaining materials, and high water. It was built in 1941-1942 by the Minnesota Department of Transportation (MnDOT).
Following an inspection of the bridge's gusset plates, it was announced by MnDOT that the bridge would close June 3, 2008. Gusset plates were the components suspected in the collapse of the I-35W Mississippi River bridge. The bridge was expected to be closed for several weeks with over 60-mile-long (97 km) detours as an alternative. The bridge reopened on June 14, 2008.
After considering a number of alternatives, including rehabilitation of only the original bridge, the Minnesota Department of Transportation announced on August 23, 2012 it had approved plans to build a new two-lane concrete box girder bridge, prior to rehabilitating the original bridge. Construction of the new bridge began immediately upstream of the cantilever bridge in July 2014, and opened for traffic in August 2016. Following the opening of the new bridge, the original cantilever bridge closed for rehabilitation. The entire project is expected to be completed by the end of 2019.
- United States Postal Service. Minnesota’s Sesquicentennial Honored. May 16, 2008.
- Winona bridge over Mississippi River closed. Star Tribune. June 3, 2008.
- MnDOT recommends second Mississippi River bridge in Winona. Pioneer Press. August 24, 2012
- "Hwy 43 Bridge - Winona". Minnesota Department of Transportation. 2017. Retrieved April 6, 2017.
- Costello, Mary Charlotte (2002). Climbing the Mississippi River Bridge by Bridge, Volume Two: Minnesota. Cambridge, MN: Adventure Publications. ISBN 0-9644518-2-4.
|Wikimedia Commons has media related to Main Channel Bridge (Winona, Minnesota).|
- Historic American Engineering Record (Library of Congress) Survey number HAER MN-91 also covers the more elegant Winona Main Channel Bridge less than a half mile south of the north channel bridge. The actual navigable channel of the Mississippi passes beneath the main channel bridge.