The first person to die during the construction of the Hoover Dam was J.G. Tierney on December 20th, 1922. On the same day 14 years later, the last person died during the dam’s construction. It was J.G.’s son Patrick. – WTF Fun Facts
hoover dam
WTF Fun Fact – Concrete In Hoover Dam
There is over 4 million cubic yards of concrete in the Hoover Dam and power plant, which is enough to build a highway from the East coast to the West coast of the US. – WTF Fun Facts
Source: https://www.usbr.gov/lc/hooverdam/faqs/damfaqs.html