Information
Creator
Creator: Davis, W. A.
Date
1931 to 1933
Description
Jumbo rig with 30-40 jackhammers to make holes for blasting. Hoover (Boulder) Dam. Note on back: "Drilling jumbo designed by Woody Williams; 3 levels, built on truck chasses (sic), used for drilling. Drilled holes with 8 ft. drill, then 12', then 20'. - W. A. Davis, 1992."
Digital ID
pho023253
Physical Identifier
0123_0152