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Bridges & Structures



Bridge Scour and Stream Instability Countermeasures Experience, Selection, and Design Guidance Third Edition, Volume 1

Bridge Scour and Stream Instability Countermeasures: Experience, Selection, and Design Guidance, Hydraulic Engineering Circular No. 23 (HEC-23), identifies and provides design guidelines for bridge scour and stream instability countermeasures that are suggested for use by various State departments of transportation (DOTs) in the United States. Countermeasure experience, selection, and design guidance are consolidated from other FHWA publications in this document to support a comprehensive analysis of scour and stream instability problems and provide a range of solutions to those problems. Selected innovative countermeasure concepts and guidance derived from practice outside the United States are introduced. Management strategies for developing a Plan of Action (POA) for scour critical bridges are outlined, and guidance is provided for scour monitoring using portable and fixed instrumentation.

There are two companion documents, Evaluating Scour at Bridges (HEC-18) and Stream Stability at Highway Structures (HEC-20). These three documents contain updated material from previous editions.

  • FHWA Publication Number: NHI-09-111
  • Publication Year: 2009


Other documents in this series:

The PDF file(s) can be downloaded at no cost, there are no free copies of the printed materials. However, printed copies are available for purchase at the NHI store: https://www.nhi.fhwa.dot.gov/training/nhistoresearchresults.aspx?topicnum=135 (look for "REFERENCE MANUAL" under the Type column).

Updated: 11/07/2022
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