The Black Hawk Bridge spans the Mississippi River, joining the town of Lansing, in Allamakee County, Iowa, to rural Crawford County, Wisconsin. It is the northernmost Mississippi River bridge in Iowa.
Black Hawk Bridge | |
|---|---|
 | |
| Coordinates | 43°21′55″N 91°12′54″W / 43.36528°N 91.21500°W |
| Carries | 2 lanes of   Iowa 9 / WIS 82 |
| Crosses | Upper Mississippi River |
| Locale | Lansing, Iowa and Crawford County, Wisconsin, River Mile 663.4 |
| Other name(s) | Lansing Bridge |
| Maintained by | Iowa Department of Transportation |
| ID number | NBI 000000000013520 |
| Characteristics | |
| Design | Cantilever through truss |
| Total length | 1,653 feet (504 m) |
| Width | 21 feet (6 m), 2 lanes |
| Longest span | 653 feet (199 m) |
| Clearance below | 68 feet (21 m) |
| History | |
| Opened | June 17, 1931 |
| Statistics | |
| Daily traffic | 2,357 (2003) |
| Toll | None |
| Location | |
 | |
Named for Chief Black Hawk, it is popularly referred to as the "Lansing bridge". It carries Iowa Highway 9 and Wisconsin Highway 82.
This riveted cantilever through truss bridge[1] has one of the more unusual designs of any Mississippi River bridge. Construction started in 1929 and was completed in 1931. The designer and chief engineer was Melvin B. Stone. The McClintic-Marshall Company of Chicago erected the trusses. The steel came from the Inland Steel Company.
The Wisconsin approach has a long causeway over Winneshiek bottoms (sloughs, ponds, and backwaters) before ramping up to the bridge itself. The main shipping channel is on the Iowa side. The Iowa approach is rather abrupt, going from a 25 miles per hour (40 km/h) city street straight up a steep ramp onto the bridge.
Originally a privately built and operated bridge owned by the Iowa-Wisconsin Bridge Company, it was closed between 1945 and 1957, due to damage from ice damming, and lacking funds to repair the bridge, the company went out of business. The two states acquired the bridge and repaired it.
In August 2011 the bridge was briefly closed for repairs after a crack was found in a floor beam.[2][3]
Replacement edit
The bridge has a sufficiency rating of 39.9 percent, which mainly reflects its obsolete nature. The Iowa Department of Transportation is planning for a replacement bridge to start construction in 2024.[4][5] It was revealed during a meeting on June 15, 2021, that the replacement bridge's design would look extremely similar to the current bridge's design while either retaining the pier's design or adopting a newer wave design.[6]
Black Hawk Bridge Shut Down edit
The Iowa Department of Transportation, in a significant move affecting commuters between Iowa and Wisconsin, has temporarily closed the Black Hawk Bridge on Highway 82 on February 25, 2024. Citing structural integrity concerns, the department has initiated a thorough inspection to ensure public safety.[7] As of February 27, 2024, Iowa DOT estimated it would take 2 months to stabilize two piers that had unexpectedly moved.[8]
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In popular culture edit
The bridge was featured in a scene from the 1999 film The Straight Story, when Alvin Straight is depicted crossing the Mississippi River near the end of his 240-mile (386 km) journey.[9]
See also edit
Notes edit
- ^ "Cantilevered truss". Bridgehunter.com.
- ^ "Iowa 9 bridge closed over the Mississippi River at Lansing". news.iowadot.gov. Retrieved 18 August 2011.
- ^ "Iowa DOT to reopen Iowa 9 bridge over the Mississippi River at Lansing today". news.iowadot.gov. Retrieved 24 August 2011.
- ^ Cantine-Maxson, Susan. "Public learns more at August 8 meeting about Iowa DOT study for potential replacement of Black Hawk Bridge in Lansing". www.waukonstandard.com. Retrieved 2018-07-13.
- ^ Iowa Department of Transportation (May 3, 2018). "Iowa 9 (Black Hawk) Bridge In Allamakee County to be Discussed May 15 in Lansing". www.news.iowadot.gov. Retrieved 2018-07-13.
- ^ "June 15 meeting by Iowa DOT reveals location and design of Black Hawk Bridge replacement, explains environmental assessment | The Standard Newspaper". www.waukonstandard.com. Retrieved 2021-07-08.
- ^ James, Kyle (2024-02-26). "Black Hawk Bridge on Highway 82 Shut Down for Safety Inspection". Iowa Pulse. Retrieved 2024-02-26.
- ^ "Mississippi River Bridge at Lansing". Iowa Department of Transportation. Retrieved 28 February 2024.
- ^ Lynch, James Q. (October 15, 1998). "Mower man film rolling". Cedar Rapids Gazette. Retrieved July 23, 2018.
References edit
- Iowa Department of Transportation, retrieved July 28, 2007
- Black Hawk Bridge Superb site, with pictures and statistics, retrieved July 28, 2007
- NationalBridges.com, retrieved August 7, 2007
- Black Hawk Bridge at Structurae. Retrieved July 28, 2007.
- Historic American Engineering Record (HAER) No. IA-43, "Black Hawk Bridge, Spanning Mississippi River at State Highway 9, Lansing, Allamakee County, IA", 13 photos, 1 color transparency, 11 data pages, 1 photo caption page
