Howard Booth was born on May 15, 1927 in Bloomsburg, Pennsylvania. He grew up in New Jersey, and served in the United States Army during World War II and the United States Air Force during the Korean War. Booth moved to Nevada in 1957, and worked as a meteorologist at the Nevada Test Site until his retirement in 1983. Booth was an active conservationist and environmentalist and helped to turn Red Rock Canyon into a National Conservation Area.

Booth passed away in Boulder City, Nevada on August 16, 2017.

Source:

Lee R. Tilman was known for working on the Boulder (Hoover) Dam construction. He was born in Gooding, Idaho and had worked many jobs including a miner, ranch hand, and truck driver. He has given interviews regarding the dam's construction for many programs including PBS (Public Broadcasting Service), the History Channel, and the Discovery Channel.

Source:

"Lee Tilman." Las Vegas Review-Journal. Accessed January 30, 2020. https://obits.reviewjournal.com/obituaries/lvrj/obituary.aspx?n=lee-tilman&pid=142144316