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Contraction scour at a bridge over the Iowa River

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Abstract

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.

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
Larger Work Title:
Proceedings - National Conference on Hydraulic Engineering
First page:
31
Last page:
35
Number of Pages:
5
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