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Title: Stream Stability at Highway Structures Fourth Edition

Description: This document provides guidelines for identifying stream instability problems at highway stream crossings. It is an update of the third edition published in 2001. The HEC-20 manual covers geomorphic and hydraulic factors that affect stream stability and provides a step-by-step analysis procedure for evaluation of stream stability problems. Stream channel classification, stream reconnaissance techniques, and rapid assessment methods for channel stability are covered in detail. Quantitative techniques for channel stability analysis, including degradation analysis, are provided, and channel restoration concepts are introduced. Significant new material in this edition includes chapters on sediment transport concepts and channel stability in gravel bed streams, as well as expanded coverage of channel restoration concepts.

FHWA Publication Number: HIF-12-004

Publication Year: 2012

Document Links: PDF (12 mb)

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Dave Henderson
Office of Bridges and Structures

Updated: 09/06/2013

United States Department of Transportation - Federal Highway Administration