In Reply Refer To: May 11, 1993 Mail Stop 415 Memorandum To: Regional Hydrologists, NR, CR, SR, WR From: Chief, Office of Surface Water Subject: Summary of the Bridge Scour Assessment Work Group The Bridge Scour Assessment Work Group was formed by the Office of Surface Water (OSW) in 1991 to address technical and coordination issues relative to scour assessment studies. The attached summary of the work group efforts is provided as an aid to Districts conducting or planning to conduct such scour studies. The summary contains work group findings that should be very beneficial in maintaining standardization among studies, and provides guidelines on approach, data-quality assurance, and quality control of scour-assessment studies. The OSW compliments the work group on its efforts that will improve the quality of scour-assessment projects. Please distribute the summary to Districts in your Region. (signed) Charles W. BoningAttachment
U.S. Department of the Interior, U.S. Geological Survey
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