Historic Bridges of the U.S. | Winnebago River US 65 Bridge

Overview

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Photos

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North Approach To Winnebago River Bridge On Southbound U.S. Highway 65 Looking South

Photo by Bruce A. Harms, LBA, Summer 1996, for HAER

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Overall View Of The Winnebago River Bridge, East Side, Looking Southwest

Photo by Bruce A. Harms, LBA, Summer 1996, for HAER

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General View Of The East Side Looking West

Photo by Bruce A. Harms, LBA, Summer 1996, for HAER

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General View Of The Cantilever Pier, East Side, Looking Southwest

Photo by Bruce A. Harms, LBA, Summer 1996, for HAER

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General View Of North Wingwall Looking Southwest Toward Abandoned Waterpump Facility For A Sugar Processing Plant South Of The Bridge

Photo by Bruce A. Harms, LBA, Summer 1996, for HAER

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Facts

Overview

Concrete tee beam bridge over Winnebago River on southbound US 65

Location

Cerro Gordo County, Iowa

Status

Open to traffic

History

Built 1926

Design

Concrete cantilever tee beam.

"The Winnebago Bridge, the longest monolithic concrete girder in Iowa, is the most technologically significant of the state's numerous concrete cantilevered girder bridges designed by the Iowa State Highway Commission. It also marks the culmination of this type of construction by ISHC."

Historic American Engineering Record, Summer 1995
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Dimensions

Length of largest span: 69.9 ft.
Total length: 124.0 ft.
Deck width: 24.0 ft.

Recognition

Posted to the National Register of Historic Places on June 25, 1998

Approximate latitude, longitude

+43.19279, -93.20961 (decimal degrees)
43°11'34" N, 93°12'35" W (degrees°minutes'seconds")

Approximate UTM coordinates

15/482968/4782244 (zone/easting/northing)

USGS topographic map

Mason City

Inventory numbers

NRHP 98000812 (National Register of Historic Places reference number)
BH 13109 (Bridgehunter.com ID)

Inspection (as of 03/2006)

Deck condition rating: Fair (5 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 67.6 (out of 100)

Average daily traffic (as of 2005)

3,450