IAIS Marble Creek Bridge

Through Girder Bridge over Marble Creek
West of Ladora, Iowa County, Iowa

Click the Photo Above to See All Photos of This Bridge!
Name IAIS Marble Creek Bridge
Built By Chicago, Rock Island & Pacific Railroad
Contractor Unknown
Currently Owned By Iowa Interstate Railroad
Length 44 Feet Total
Width 1 Track
Height Above Ground 20 Feet (Estimated)
Superstructure Type Through Plate Girder
Substructure Type Concrete
Date Built Ca. 1901
Date Replaced November 2021
Traffic Count 4 Trains/Day (Estimated)
Current Status Replaced
RI Bridge Number 2750
Significance Local Significance
Documentation Date May 2017
In 1863, the Mississippi and Missouri Railroad continued construction of a mainline across the center of Iowa. A 31 mile segment from Iowa City to Marengo opened that year.
The next year, another 20 mile segment from Marengo to Brookyln opened. By 1864, the route opened to Kellogg, located in Jasper County.

In 1866, the Mississippi and Missouri Railroad was purchased by the Chicago, Rock Island & Pacific Railroad. The Rock Island completed the route into Des Moines by 1867.

While the route continued to Council Bluffs to the west and Chicago to the east, this middle segment of the route was equally as important. It opened up expansion and gave the Rock Island many connections to other railroads.
Due to the popularity of the route, much of it was extensively rebuilt between 1899 and 1901. While most of this segment would never be double tracked, the biggest project was building new bridges.
Despite the efficiency and popularity of this route under Rock Island, the Rock Island began seeing serious financial troubles as soon as the end of World War II. As a result, the railroad entered its final bankruptcy in 1980 and the property was liquidated.

In 1981, the Iowa Railroad Company began operating this line between Council Bluffs and Bureau, Illinois. Despite the birth of a short line railroad, shippers questioned the ability to effectively move goods.
As a result, the Iowa Interstate Railroad was born in 1984. Since the conception, the railroad has become well known and respected in Iowa. Presently, this route is known as the Third Subdivision.

This small standard through girder bridge crossed Marble Creek just west of Ladora.
Built in 1901, the bridge clearly had received updates to the substructures in the last 30 years.
Consisting of a single through girder span, the entire bridge sat on concrete substructures. It would appear modifications to these occurred in the late 20th Century, and included encasing an older abutment in concrete.
Overall, the bridge remains in good condition. Like many structures along this route, the bridge had been rehabilitated into good condition.

The author has ranked this bridge as being locally significant, due to the common design of the bridge. The bridge was replaced the morning of November 18th, 2021.
The photo above is an overview. The bridge can be accessed from US-6.


Source Type


Build Date Based on reconstruction of route
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele

Widget is loading comments...

© Copyright 2010- John Marvig and Contributors. All Rights Reserved