Manuscripts
Boulder Canyon- Drilling was carried on here for two years before it was decided to put dam at Black Canyon. Note barge in center of river from which drilling was done
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First camp on Colorado River at head of Boulder Canyon. Here drilling was done and sounding made before moving to Black Canyon where Dam is located
Manuscripts
mssMarston papers V102/0027
Diamond Drill, Black Canyon. The drilling is preparing for Hoover Dam
Manuscripts
mssMarston papers V102/0144
