The Jamey Stillings Photographs (2009-2024) is primarily comprised of photographs taken by professional photographer, Jamey Stillings documenting various infrastructure projects in the region. The Mike O’Callaghan-Pat Tillman Memorial Bridge project at the Hoover Dam depicts the construction of the Mike O’Callaghan-Pat Tillman Memorial Bridge from 2009 to 2012. The Ivanpah Solar Electric Generating System project depicts aerial views of Ivanpah Solar in the Mojave Desert of California from 2010 to 2014. The Crescent Dunes Solar project consists of a range of aerial and ground-based work documenting SolarReserve's Crescent Dunes Solar near Tonopah, Nevada, from 2014 to 2015. The Tapping the Colorado project consists of aerial work documenting the historically critical water levels in Lake Mead and Lake Powell in 2021 and 2022.

The Helen J. Stewart Photographs depict the Stewart Family from approximately 1860 to 1950. The photographs primarily depict Helen J. Stewart and her children as well as the Stewart Ranch (also know as the Las Vegas Ranch) in Southern Nevada. The photographs include the early Las Vegas, Nevada town site, landscapes of Southern Nevada and the American Southwest, mines and mining camps, railroads and railroad workers, the Las Vegas Fort (also known as the Old Mormon Fort), hotels and early businesses in Las Vegas, Native Americans and Native American artifacts, and postcards.