FHWA Resource Center
GEOTECH & HYDRAULICS TEAM
Hydraulic Engineering Circular No. 18, 4th Edition
EVALUATING SCOUR AT BRIDGES
Publication No. FHWA-NHI-01-001
May 2001
ABSTRACT:
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 T5140.20 has since been superseded by T5140.23, Evaluating Scour at Bridges dated October 28, 1991.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.
DOCUMENT AVAILABILITY:
To download an electronic copy:
RELATED NHI TRAINING COURSE:
FHWA-NHI-135065, Introduction to Highway Hydraulics
FHWA-NHI-135081, Introduction to Highway Hydraulics Software
RELATED SOFTWARE:
Visual Urban – Urban Drainage Design Programs (2002)
FHWA TECHNICAL CONTACTS:
Mr. Jorge Pagán-Ortiz
Sr. Hydraulics Engineer, FHWA Headquarters
Phone: (202) 366-4604
Email: jorge.pagan@fhwa.dot.gov
Ms. Cynthia Nurmi
Hydraulics Engineer, FHWA Resource Center
Phone: (404) 562-3908
Email: cynthia.nurmi@fhwa.dot.gov
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