Bridge Scour Countermeasure Assessments at Select Bridges in the United States, 2016–18

Open-File Report 2019-1008
Prepared in cooperation with the Federal Highway Administration
By: , and 



In 2009, the Federal Highway Administration published Hydraulic Engineering Circular No. 23 (HEC-23) to provide specific design and implementation guidelines for bridge scour and stream instability countermeasures. However, the effectiveness of countermeasures implemented over the past decade following those guidelines has not been evaluated. Therefore, in 2013, the U.S. Geological Survey, in cooperation with the Federal Highway Administration, began a study to assess the current condition of bridge-scour countermeasures at selected sites to evaluate their effectiveness. Bridge-scour countermeasures were assessed during 2016–2018 after additional sites were added following a similar study. Site assessments included reviewing countermeasure design plans, summarizing the peak and daily streamflow history, and assessments at each site. Each site survey included a photo log summary, field form, and topographic and bathymetric geospatial data and metadata. This report documents the study area and site-selection criteria, explains the survey methods used to evaluate the condition of countermeasures, and presents the complete documentation for each countermeasure assessment.

Suggested Citation

Dudunake, T.J., Huizinga , R.J., and Fosness, R.L., 2019, Bridge scour countermeasure assessments at select bridges in the United States, 2016–18: U.S. Geological Survey Open-File Report 2019-1008, 12 p.,

ISSN: 2331-1258 (online)

Table of Contents

  • Abstract
  • Introduction
  • Methods
  • Scour Countermeasure Assessment Data
  • Summary
  • Acknowledgments
  • References Cited
Publication type Report
Publication Subtype USGS Numbered Series
Title Bridge scour countermeasure assessments at select bridges in the United States, 2016–18
Series title Open-File Report
Series number 2019-1008
DOI 10.3133/ofr20191008
Year Published 2019
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Idaho Water Science Center
Description Report: iv, 12 p.; Data release
Time Range Start 2016-01-01
Time Range End 2018-12-31
Country United States
State Connecticut, Idaho, Iowa, Missouri, Montana, New Jersey, Pennsylvania, South Carolina
Online Only (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details