Historic Bridges of the U.S. | South Third Avenue Bridge

Overview

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Photos

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Overall View From East Looking Wnw

Photo by The Grau Studio, 1979

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Overall Elevation From West Looking East

Photo by The Grau Studio, 1979

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Overall View From West Looking East

Photo by The Grau Studio, 1979

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Three Quarter Frontal View From South, Looking Nne

The reinforced concrete deck was designed to support a double-track streetcar line, twelve feet on centers.

Photo by The Grau Studio, 1979

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South Arch Section, East Side: Snowing Panalized [sic] Arch, Three Hangers

The overall width of the bridge was 36 feet, including two sidewalks that were six feet in width.

Photo by The Grau Studio, 1979

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Facts

Overview: Lost Marsh arch bridge over Linn Creek on Third Avenue in Marshalltown
Location: Marshalltown, Marshall County, Iowa
Status: Lost
History: Built 1920; Deemed at
Builders: - Marsh Engineering Co. of Des Moines, Iowa (Designer)
- N.M. Stark & Co.
Design: "The South Third Avenue bridge in Marshalltown is one of fifteen known concrete rainbow arch bridges in Iowa. It is considered an important structural form in the development of reinforced concrete technology and illustrates Iowa's significant civil engineering heritage. It was designed by the March Engineering Company of Des Moines, Iowa, for the City of Marshalltown. James B. Marsh also was granted the U.S. patent for this bridge style. Also considered important is the fact that the interior reinforcing varies from that specified in the original patent and, in some details, varies from the design plans.
"This [HAER] documentation fulfills the obligations the Iowa Department of Transportation and the Federal Highway Administration under a Memorandum of Agreement between the Federal Highway Administration, the Iowa State Historic Officer, and the Advisory Council on Historic Preservation, pursuant to 36 CFR 800. The bridge was photographed in November, 1979, by Grau Studios, Marshalltown, Iowa and printed by Demett, Muessig, and Associates, Ltd., Iowa City, Iowa, in February, 1981."
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Dimensions: Length of largest span: 106 ft.
Total length: 154 ft.
Deck width: 36 ft.
Also called: Rainbow Arch Bridge
Approximate latitude, longitude: +42.04060, -92.90800 (decimal degrees)
42°02'26" N, 92°54'29" W (degrees°minutes'seconds")
Approximate UTM coordinates: 15/507614/4654288 (zone/easting/northing)
USGS topographic map: Marshalltown
Inventory number: BH 37408 (Bridgehunter.com ID)