Hydraulics Engineering Publications

Title: Evaluating Scour at Bridges, Fourth Edition

Description: Evaluating Scour at Bridges, Hydraulic Engineering Circular No. 18 (HEC-18), presents the state of knowledge and practice for the design, evaluation and inspection of bridges for scour. Namely, the purpose of this document is to provide guidelines for the following: designing new and replacement bridges to resist scour, evaluating existing bridges for vulnerability to scour, inspecting bridges for scour, and improving the state-of-practice of estimating scour at bridges.

There are two companion documents, Stream Stability at Highway Structures (HEC-20) and Bridge Scour and Stream Instability Countermeasures (HEC-23). These three documents contain updated material from previous editions and the publication Interim Procedures for Evaluating Scour at Bridges issued in September 1988 as part of the FHWA Technical Advisory T 5140.20, Scour at Bridges. T5140.20 has since been superseded by T5140.23, Evaluating Scour at Bridges dated October 28, 1991. This fourth edition of HEC-18 contains revisions obtained from further scour-related developments and the use of the 1995 edition by the highway community.

FHWA Publication Number: NHI-01-001

Publication Year: 2001

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Other documents in this series:

Current

• Evaluating Scour at Bridges, Fourth Edition (Errata Sheet)

Archive

• Evaluating Scour at Bridges, Edition 3 (SI)
• Evaluating Scour at Bridges, Edition 2