Corbett's Mill Bridge

Map 

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Facts 

Overview

Bowstring pony truss bridge over Maquoketa River on Abandoned Road in Scotch Grove

Location

Scotch Grove, Jones County, Iowa

History

Built 1871; Bypassed by a new road in 1958 and passed into private ownership.

Builder

- Miller & Jamieson

Design

"The Corbett's Mill bridge is an example of what was once a common bridge form: the bowstring arch-truss. In the 1860s and 1870s bowstring arch-trusses were used extensively because of their great structural efficiency and relatively low construction costs. During this period many thousands of bowstring arch-trusses were built in the nation. Because the development of Iowa's transportation system coincided with this period, the number of bowstrings built in the state numbered in the many hundreds. Most of these were built by the large Ohio bridge companies, such as the King Iron Bridge and Manufacturing Company, the Massillon Bridge Company, and the Wrought Iron Bridge Company. The Corbett's Mill bridge is an excellent example of a bowstring arch-truss that was built by a smaller company: the Buckeye Bridge Company, also of Ohio.

"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: Geoffrey H. Goldberg, engineer, August 1995
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Dimensions

Length of largest span: 128 ft.
Total length: 128 ft.

Recognition

Posted to the National Register of Historic Places

Also called

Eby's Mill Bridge

Approximate latitude, longitude

+42.19641, -91.05714   (decimal degrees)
42°11'47" N, 91°03'26" W   (degrees°minutes'seconds")

Approximate UTM coordinates

15/660410/4673410 (zone/easting/northing)

USGS topographic map

Scotch Grove, Iowa UTM: 15.660410.4673415

Inventory numbers

NRHP 85000722 (National Register of Historic Places reference number)
BH 37395 (Bridgehunter.com ID)

Categories 

Update Log 

• September 10, 2008: Added by J.R. Manning

Sources 

• J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
• HAER IA-60 - Corbett's Mill Bridge

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