Browse Items (1410 total)

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

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…

Panoramic view of work on south canyon wall

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