Historic Bridges of the U.S. | Grand Avenue Viaduct

Overview

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Photos

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East Approach To Grand Avenue Viaduct Looking West

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

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Overall View Of The East Portion Of Viaduct, South Side, Looking Northwest

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

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Overall View Of The Central Portion Of Viaduct, South Side, Looking Northeast

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

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Overall View Of The West Portion Of Viaduct, South Side, Looking Northwest

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

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General View Of The West Abutment And Approach, North Side, Looking Southwest

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

View photos at Library of Congress

Facts

Overview

Steel stringer bridge over Over UPRR, Streets on IA 12/US Business 20 in Sioux City

Location

Sioux City, Woodbury County, Iowa

Status

Open to traffic

History

Built 1936; rehabilitated 1967

Builder

- C.F. Lytle

Design

"Extending for over three-quarters of a mile, the Grand Avenue Viaduct is Iowa's longest grade separation and the state's longest bridge except for the Mississippi River structures.

""This document was prepared as part of the Iowa Historic Bridges Recording Project performed durng the Summer of 1995 by the Historic American Engineering Record (HAER). The project was sponsored by the Iowa Department of Transportation (IDOT). Preliminary research on this bridge was performed by Clayton B. Fraser of Fraserdesign, Loveland, CO."

Historian: Richard Vidutis and James Hippen, Summer 1996
`

Dimensions

Length of largest span: 127.0 ft.
Total length: 3,973.3 ft.
Deck width: 56.1 ft.

Recognition

Eligible for the National Register of Historic Places

Also called

Gordon Avenue Bridge

Approximate latitude, longitude

+42.49444, -96.39167 (decimal degrees)
42°29'40" N, 96°23'30" W (degrees°minutes'seconds")

Approximate UTM coordinates

14/714342/4707973 (zone/easting/northing)

USGS topographic map

Sioux City South

Inventory number

BH 37431 (Bridgehunter.com ID)

Inspection (as of 12/2007)

Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 35.0 (out of 100)

Average daily traffic (as of 2006)

26,400