
The top photo is of a worker in 1900 who is starting to divert water in the Hoover Dam area. The bottom photo is of Colorado river development during the 1900s. These two primary sources provided by UNLV can be useful sources of info in giving a visual of what people were wearing and doing and tools they were working with.
Two online primary sources:
http://mutex.gmu.edu:2068/pqdweb?index=2&did=328684372&SrchMode=1&sid=2&Fmt=10&VInst=PROD&VType=PQD&RQT=309&VName=HNP&TS=1202859222&clientId=31810
This first link is titled “Colorado River Plan Up Again.” It is from a 1922 edition of the LA Times and it discusses how Secretary of Commerce Hoover is finalizing the go-ahead plans of the the Colorado River development in Boulder Canyon.
http://mutex.gmu.edu:2068/pqdweb?index=7&did=465115822&SrchMode=1&sid=2&Fmt=10&VInst=PROD&VType=PQD&RQT=309&VName=HNP&TS=1202859222&clientId=31810
This is another article from the LA Times documenting Hoover’s struggle to get everyone on board the project to bring the largest amount of energy the west has ever seen to the area.