Okoboji Bridge

Map 

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Facts 

Overview

Concrete deck girder bridge over East Okoboji Lake on US 71 & IA 9 in Okoboji

Location

Okoboji, Dickinson County, Iowa

Status

Open to traffic

History

Built 1929; rehabilitated 1979

Builder

- Wickham Bridge & Pipe Co.

Design

"Built in 1929, the Okoboji Bridge is one of only four cantilevered concrete girders known to remain in use on Iowa's highways. Employed where a simpler, less costly steel stringer span would have sufficed, the bridge represents an affinity for concrete construction and an uncharacteristic commitment to aesthetics on the part of the Iowa State Highway Commission. The structure is also noteworthy as the latest in a series of spans over the strait between East and West Okoboji Lakes - the oldest bridged crossing in Dickinson County. The present Okoboji Bridge and its five timber and steel predecessors represent a continuum of bridge construction stretching back more than 130 years, providing insight into the evolution of bridge technology."

Clayton B. Fraser
Fraserdesign
Loveland, Colorado
`

Dimensions

Length of largest span: 39.0 ft.
Total length: 64.0 ft.
Deck width: 54.1 ft.

Approximate latitude, longitude

+43.37501, -95.12734   (decimal degrees)
43°22'30" N, 95°07'38" W   (degrees°minutes'seconds")

Approximate UTM coordinates

15/327659/4804658 (zone/easting/northing)

USGS topographic map

Okoboji, Iowa UTM: 15.327660.4804660

Inventory number

BH 37321 (Bridgehunter.com ID)

Inspection (as of 02/2007)

Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Good (7 out of 9)
Substructure condition rating: Good (7 out of 9)
Sufficiency rating: 74.1 (out of 100)

Average daily traffic (as of 2006)

9,200

Categories 

Update Log 

• August 27, 2008: Added by J.R. Manning

Sources 

• J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
• HAER IA-40 - Okoboji Bridge

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