Stream Stability at Highway Structures (Fourth Edition). Hydraulic Engineering Circular No. 20. Publication No. Fhwa-Hif-12-004

Full color, richly illustrated book. The purpose of this document is to provide guidelines for identifying stream instability problems at highway stream crossings. Techniques for stream channel classification and reconnaissance, as well as rapid assessment methods for channel instability are summarized. Qualitative and quantitative geomorphic and engineering techniques useful in stream channel stability analysis are presented.