Front:
LOWERING 30 FOOT PIPE, BOULDER DAM
5A-HI419
Back:
Lowering a section of 30 foot diameter pipe into
the canyon by 200 ton government cableway. Note
control house for cableway in left center.
BOULDER DAM SERVICE BUREAU, BOULDER CITY, NEVADA
"c. T. PHOTO.COLORIT"
AL
CHIS
CAO
