Bridge Scour and Stream Instability Countermeasures

by J. R. Richardson, Resource Consultants Inc, Ft. Collins, United States,
A. M. Wacker, Resource Consultants Inc, Ft. Collins, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Stream instability is characterized by lateral or vertical instability. Such instability has led to the failure of bridges and loss of life. Lateral instability is caused by lateral migration of the stream or river, while vertical instability can be caused by a combination of contraction scour, long term aggradation or degradation, and local scour. Countermeasures for stream instability and scour are discussed for either existing or new bridges and are recommended for use by the Federal Highways Administration (FHWA).

Subject Headings: Scour | Rivers and streams | River bank stabilization | Highway bridges | Bridge failures | Lateral stability | Federal government

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