West Canal, Columbia Basin Project, of which the Grand Coulee Dam is a part. This photograph was taken at the site of the Dry Coulee Siphon No. 1 and shows final grading preparatory to the building of the siphon.
Main Canal, Columbia Basin Project, of which the Grand Coulee Dam is a part. This picture was taken from the inlet portal of the Bacon Tunnel. A siphon will cross the Coulee below and connect the Main Canal open section (background) with tunnel.
Main Canal, Columbia Basin Project, of which the Grand Coulee Dam is a part. This is part of the southerly six and one half mile section of the Main Canal. Canal must be lined with concrete before it can be used.