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Dallas County, IA – 2014 Corrugated Steel Pipe and Pipe Arch Project of the Year

2014 Steel Pipe and Arch Project of Year Winner:

Dallas County, IA


A landowner in Dallas County, Iowa, required access to his farmland but the existing bridge was beyond its useful life and no longer safe. Replacing this deteriorating bridge quickly and in the most cost effective manner were both key considerations.

After talking with the Dallas County Road and Bridge Department, the landowner’s best option proved to be a 144″ diameter, 8 gage 3″x1″ corrugation galvanized riveted corrugated steel pipe.

The flowline length was 54 feet with a 3′ top and bottom step fabricated on 2:1 bevel cuts on both the inlet and outlet sides. The bevel cuts were fabricated using a common cut, creating no scrap.

The two sections of 17-ft long pipe were attached to a center 20-ft pipe with two 24″ wide annular connecting bands, creating a 54-ft structure.

The 7′ x 20′ curtain walls, provided in 10 gage, were shipped separately for the contractor to easily bolt on after the pipe was properly located.

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For more information on this and the many other benefits of Corrugated Steel Pipe, contact us by calling (972) 850-1907 or visiting www.ncspa.org.