Terminal Structures and Energy Dissipation at Outlet Works and Spillways: On-Demand

Effective energy dissipation of flows from outlet works and spillways is an extremely important component in dam safety. Undersized or ineffective structures can lead to damage and failure, possibly endangering the dam or the flow channel and properties downstream. Generalized design criteria for many different types of energy dissipaters and/ or stilling basins exist from several different government agencies, both federal and state (including many state dam safety offices). This webinar will provide an introduction to the problem of why energy dissipation is necessary, a review of the many types of structures and their application, specialized designs, typical operations and problems, and where to find more information.

K. Warren Frizell

Research Hydraulic Engineer

Mr. Frizell spent the last 36 years working at Reclamation’s hydraulic laboratory in Denver, Colorado and most recently held the position of Research Hydraulic Engineer. He has been involved in a large variety of laboratory and field investigations over the years.  Mr. Frizell retired on January 3, 2013.

His work interests have been with complex flows; including cavitation, air-water mixtures, fluid related issues with hydraulic machinery and equipment, and stepped spillways. His most recent laboratory studies have included; cavitation potential on stepped spillways and the design of a “cavitation damage free” baffle block shape for a modified type III stilling basin (both for the new auxiliary spillway at Folsom Dam in California) and a study on the performance of type III stilling basins with stepped chutes. He is the author or co-author of over 100 publications.


On-Demand Viewing
Open to view video.
Open to view video. On-Demand Viewing
Post Survey
4 Questions
4 Questions Post Survey
Completion Quiz
10 Questions  |  3 attempts  |  6/10 points to pass
10 Questions  |  3 attempts  |  6/10 points to pass Completion Quiz
Completion Certificate
2.00 PDH credits  |  Certificate available
2.00 PDH credits  |  Certificate available Completion Certificate