Gilbert P. Church was a civil engineer and Project Manager at the Hanford site during the Manhattan Project. In 1943, the DuPont Company selected Church to lead their Manhattan Project efforts. Church, along with Major Franklin T. Matthias and A.E.S. Hall, surveyed sites in Washington, Oregon, California, and California before choosing Hanford as the site for the world’s first full-scale nuclear production reactor. In this interview, Church describes the challenges faced throughout the project, such as creating a community for up to 45,000 builders, training and providing for these individuals, and completing one of the largest construction projects of the era within tight time constraints.