Research Article
Nov 1973
Emergency Redesign of Silver Jack Spillway
Abstract
A massive landslide destroyed the nearly completed spillway stilling basin at Silver Jack Dam in Colorado. Geologic conditions at the site, the extent of the slide, subsequent damage, and the emergency redesign of the spillway are described. Also described are the hydraulic model studies performed to assure satisfactory flow conditions and with unsymmetrical approach flow resulting from a circular curve in the approach conduit. A deflector vane was installed in the crown of the tunnel downstream from the curve to prevent the flow crossing over the top and sealing the portal. Vanes were developed for the stilling basin approach chute to improve flow distribution in the basin. Unique baffle blocks were developed to provide good energy distribution in a basin that had insufficient tailwater depth to form a conventional hydraulic jump. Pressure measurements were made on the conduit bend, conduit vane, chute vanes, and baffle blocks.
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Information & Authors
Information
Published In
Journal of the Power Division
Volume 99 • Issue 2 • November 1973
Pages: 265 - 279
Copyright
© 1973 American Society of Civil Engineers.
History
Published in print: Nov 1973
Published online: Feb 11, 2021
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Authors
Affiliations
Gustavus W. Center
Civ. Engr., Div. of Design, Bureau of Reclamation, Denver, Colo
Thomas J. Rhone, M.ASCE
Hydr. Engr., Div. of General Research, Bureau of Reclamation, Denver, Colo
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.