Stop Logs for Emergency Spillway Gate Dewatering
Publication: Journal of Hydraulic Engineering
Volume 137, Issue 6
Abstract
Emergencies resulting in uncontrolled flow through spillway gates often lead to millions of dollars lost to repairs, lack of dam productivity, property damages, and risks to public health and safety. A considerable need exists for reliable emergency dewatering systems to prevent these consequences. Stop logs are the most commonly used dewatering system for spillway gates but are typically designed for maintenance purposes only. They have been found in most cases to be unreliable for emergency closure under flowing conditions. Considering the economic advantages a dewatering system would provide were it functional for the dual purposes of maintenance as well as emergency closure, a new stop log design was developed. This study assesses the design that enables deployment under no-flow conditions as well as flowing, or emergency conditions. The information found in this study provides dam owners, operators, and engineers with options to reduce damages resulting from uncontrolled releases owing to partial or complete failure of spillway gates, including the failure of gates to close after having been raised.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 137 • Issue 6 • June 2011
Pages: 644 - 650
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Jul 21, 2010
Accepted: Oct 14, 2010
Published online: Oct 19, 2010
Published in print: Jun 1, 2011
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