This document provides guidelines for identifying stream instability problems at highway stream crossings and for the selection and design of appropriate countermeasures to mitigate potential damages to bridges and other highway components at stream crossings. The HEC-20 (Hydraulic Engineering Circular No. 20) manual covers geomorphic and hydraulic factors that affect stream stability and provides a step-by-step analysis procedure for evaluating stream stability problems. Guidelines and criteria for selecting countermeasures for stream stability problems are summarized, and the design of three countermeasures (spurs, guide banks, and check dams) is presented in detail. Conceptual design considerations for many other countermeasures are summarized.

  • Corporate Authors:

    Resource Consultants, Incorporated

    402 West Mountain Avenue, P.O. Box Q
    Fort Collins, CO  United States 

    Federal Highway Administration

    Turner-Fairbank Highway Research Center, 6300 Georgetown Pike
    McLean, VA  United States  22101
  • Authors:
    • Lagasse, P F
    • Schall, J D
    • Johnson, F
    • Richardson, E V
    • Richardson, J R
    • Chang, Fei
  • Publication Date: 1991-2

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 225 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00608470
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-IP-90-014, HEC-20, 3D9C0043
  • Contract Numbers: DTFH61-89-C-00003
  • Files: TRIS, USDOT
  • Created Date: May 31 1991 12:00AM