Photo taken by Scott Vavroch in November 2016
BH Photo #369379
In April 1881 the Hardin County Board of Supervisors resolved to erect an all-iron bridge across the Iowa River. Spanning 155 feet, the structure would form the north entrance to Eldora, the county seat. In June a contract to erect the bridge and its tubular piers was awarded to the Columbia Bridge Works of Dayton, Ohio. Known locally as the Coal Bank Hill Bridge, this structure carried regional traffic until the late 1910s, when Hardin County began considering its replacement. In the summer of 1918 the county commissioned the state highway commission to design a new superstructure that would be placed on the existing iron piers. Competitive bids were solicited, and in September 1918 bids were received from the A. Olson Construction Company and the Des Moines Bridge and Iron Company. Low bidder at $10,765, Des Moines B&I was awarded the contract, but the decision was later rescinded by the supervisors, and the project was re-advertised. When bids were received in March 1919, they were again rejected as too high. Finally, on April 9, 1919, the Des Moines Bridge and Iron Works was re-awarded the contract for the smaller sum of $8,690. The Coal Bank Hill Bridge, completed later that year with no further interruptions, carried traffic for several decades before its closure. It has since been allowed to molder in place by the county. "Designs for several bridges of importance were prepared by commission last year," ISHC reported in 1918. "Owing to the prevailing high prices of construction and the necessity for the conservation of materials and labor [caused by World War I] many of the more important pieces of construction were deferred for the period of the war." The Coal Bank Hill Bridge was one of those structures that suffered from wartime shortages. It employed a riveted Parker design - ISHC's standard for long-span trusses throughout the 1920s and 1930s. With their inherently long spans, Parker trusses were never very common in Iowa. The Coal Bank Hill Bridge is the oldest remaining ISHC Parker truss that can be definitively traced. It is this that makes it a noteworthy transportation-related resource [adapted from Crow-Dolby and Fraser 1992].
Present ownership is unknown.