Browse Items (68 total)

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.

Downstream side of dam after concrete has been poured. Forms are being removed and lower part of wall has already received its coat of of coal tar paint for protection against the elements and for water proofing.

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

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

Second 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 showing canyon wall down to bedrock. View also shows intermediate, south additional and upper cutoff walls and also shows progress of earth fill placement

Panoramic view of work on south canyon wall

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…

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