1 vote

3rd Avenue Rainbow Arch Bridge


Overall View From East Looking Wnw

Photo by The Grau Studio, 1979

View photos at Library of Congress

BH Photo #123679



Lost Marsh arch bridge over Linn Creek on Third Avenue in Marshalltown
Marshalltown, Marshall County, Iowa
Built 1920; Replaced 1982
- Marsh Engineering Co. of Des Moines, Iowa
- N.M. Stark & Co. of Des Moines, Iowa
"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."

Length of largest span: 106.0 ft.
Total length: 154.0 ft.
Deck width: 36.0 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)
Quadrangle map:
Inventory number
BH 37408 (Bridgehunter.com ID)

Update Log 

  • September 12, 2008: Added by J.R. Manning

Related Bridges 


  • J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
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