Hydraulic Model Studies of Aeration Devices for Yellowtail Dam Spillway Tunnel, Pick-Sloan Missouri Basin Program, Montana: Fid-Bau Portal

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Hydraulic Model Studies of Aeration Devices for Yellowtail Dam Spillway Tunnel, Pick-Sloan Missouri Basin Program, Montana

D. M. Colgate

Prototype operation of the Yellowtail Dam tunnel spillway in 1967 resulted in severe damage to the tunnel. The damage was caused by cavitation initiated by surface irregularities in the tunnel lining. The major damage was concentrated in the vertical bend and in the tunnel just downstream from the bend. An aeration slot to introduce air into the flowing water was to be constructed concurrently with tunnel repairs. A laboratory model of the tunnel was used to study various locations and configurations of aeration slots. As a result of the model study, one aeration slot was designed that was suitable for all spillway discharges. The optimum location for the slot was determined to be just upstream from the vertical bend. (Author)

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Hydraulic Model Studies of Aeration Devices for Yellowtail Dam Spillway Tunnel, Pick-Sloan Missouri Basin Program, Montana

D. M. Colgate

Prototype operation of the Yellowtail Dam tunnel spillway in 1967 resulted in severe damage to the tunnel. The damage was caused by cavitation initiated by surface irregularities in the tunnel lining. The major damage was concentrated in the vertical bend and in the tunnel just downstream from the bend. An aeration slot to introduce air into the flowing water was to be constructed concurrently with tunnel repairs. A laboratory model of the tunnel was used to study various locations and configurations of aeration slots. As a result of the model study, one aeration slot was designed that was suitable for all spillway discharges. The optimum location for the slot was determined to be just upstream from the vertical bend. (Author)

Hydraulic Model Studies of Aeration Devices for Yellowtail Dam Spillway Tunnel, Pick-Sloan Missouri Basin Program, Montana

D. M. Colgate

Prototype operation of the Yellowtail Dam tunnel spillway in 1967 resulted in severe damage to the tunnel. The damage was caused by cavitation initiated by surface irregularities in the tunnel lining. The major damage was concentrated in the vertical bend and in the tunnel just downstream from the bend. An aeration slot to introduce air into the flowing water was to be constructed concurrently with tunnel repairs. A laboratory model of the tunnel was used to study various locations and configurations of aeration slots. As a result of the model study, one aeration slot was designed that was suitable for all spillway discharges. The optimum location for the slot was determined to be just upstream from the vertical bend. (Author)

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Title:

Hydraulic Model Studies of Aeration Devices for Yellowtail Dam Spillway Tunnel, Pick-Sloan Missouri Basin Program, Montana

Contributors:

D. M. Colgate (author)

Publication date:

1971

Size:

19 pages

Type of media:

Report

Type of material:

No indication

Language:

English

Keywords:

Civil Engineering , Dams , Hydraulic models , Tunnel linings , Damage , Cavitation , Failure , Aeration , Model tests , Structural design , Montana , Spillways , Yellowtail Dam , Pick Sloan Missouri Basin Program

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