U.S. Department of the Interior


Date of this Version



Published in Hydraulic Engineering: Saving a Threatened Resource—In Search of Solutions: Proceedings of the Hydraulic Engineering sessions at Water Forum ’92. Baltimore, Maryland, August 2–6, 1992. Published by American Society of Civil Engineers.


A physical model study was conducted in the Hydraulics Laboratory of the us Bureau of Reclamation to develop a modification for the stilling basin at Arthur R. Bowman Dam, Oregon. Flow through the existing stilling basin generates supersaturated dissolved gas levels that exceed state standards. Alternatives stilling basin designs were considered. Resulting dissolved gas levels, modified energy dissipation, and potential structure and river bottom and bank erosion were evaluated.