| Abstract: | Contraction scour at the State Highway 2 bridge over the Weldon River in south-central Iowa was caused by a flood of record proportions on September 14 and 15, 1992. The peak discharge was 1, 930 cubic meters per second,which was 4 times the probable 100-year flood used to design the bridge, and resulted in road overflow. Contraction scour exposed the pier footings, but a subsurface layer of glacial clay apparently resisted additional vertical scour and caused the scouring process to move laterally. The embankment at the left abutment was eroded away, exposing 3 m of vertical abutment piling. |
| Genre: | Conference Paper |
| ProdID: | 70017890 |
| Citation Author: | Fischer, Edward, E. |
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| Citation Editor: | Shen Hsieh WenSu S.T.Wen Feng |
| Citation End Page: | 1859 |
| Citation Issue: | pt 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Proceedings - National Conference on Hydraulic Engineering |
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| Citation Number Of Pages: | 6 |
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| Citation Publisher: | Publ by ASCE |
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| Citation Search Results Text: | Scour at a bridge over the Weldon River, Iowa; 1993; Conference Paper; Proceedings - National Conference on Hydraulic Engineering; Fischer, Edward, E. |
| Citation Start Page: | 1854 |
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| Citation Year: | 1993 |
| Type: | citation/reference |
| Text: | Scour at a bridge over the Weldon River, Iowa; 1993; Conference Paper; Proceedings - National Conference on Hydraulic Engineering; Fischer, Edward, E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1993 00:00 -0600 |
| Publisher: | Publ by ASCE |
