Contraction scour at a bridge over the Iowa River



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Flooding of the Iowa River during July and August 1993 caused extensive contraction scour at the State Highway 99 bridge over the Iowa River at Wapello, Iowa. At least 3.3 m of piling under the footing of the second pier from the right (west) abutment were exposed. The scoured streambed did not fill in again after the flood receded, and a bathymetric survey in November 1993 showed that the streambed had been scoured for a distance of about 500 m upstream from the bridge. The bridge was closed to traffic, first because of water over the roadway when a levee failed, and then remained closed because of the exposed piling. The bridge subsequently was reopened to traffic with a weight limit of 13.6 tons.

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Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Contraction scour at a bridge over the Iowa River
ISBN 0784400377
Issue pt 1
Year Published 1994
Language English
Publisher Publ by ASCE
Publisher location New York, NY, United States
Contributing office(s) Iowa Water Science Center
Larger Work Title Proceedings - National Conference on Hydraulic Engineering
First page 31
Last page 35
Conference Title Proceedings of the 1994 ASCE National Conference on Hydraulic Engineering
Conference Location Buffalo, NY, USA
Conference Date 1 August 1994 through 5 August 1994
Country United States
State Iowa
Online Only (Y/N) N
Additional Online Files (Y/N) N
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