Browse Items (68 total)

View showing Gallery Tunnel in various phases of construction. Lower part or section is first completed before upper section can be made.

In wooden cribbing and by air tamping. A desired compaction of earth fill is reached.

Another view taken from upstream side of dam showing upper cutoff wall, intermediate cutoff and pump sump in foreground

Construction view of lower and cutoff wall; taken from downstream side of dam. In lower part of picture forms for Gallery are being completed.

General views of dam taken from upper coffer dam. Lower, intermediate, and upper cutoff walls show various phases of construction.

North side between lower cutoff wall and gravel fill. In lower part of picture wooden gribbing is being placed around pump sump as earth fill raises higher and higher. When water in the sump pump rises no higher and earth fill progresses then pump…

This view is showing one complete section of drainage Tunnel Gallery.

View taken from South side of canyon; shows opening of north drainage tunnel and preliminary stages of construction on open drainage gallery section

Panoramic view of canyon showing earth fill conveyor, Gallery Tunnel, lower cutoff wall, pump sump and contact of earth fill and gravel section of dam

Panoramic view of work on south canyon wall