The collection consists of Mercedes Deiz's papers and photographs, as well materials of and relating to members of her family. In addition to her resumés and the transcript of a 1981 oral history interview conducted by the Oregon Historical Society, materials include papers from Deiz's time working for the Bonneville Power Administration, correspondence, court documents, newspaper clippings, photographs, and awards and honors she received throughout her career. Additional materials include Deiz family photographs, the transcript of an oral history with Mercedes Deiz's husband Carl Deiz, Carl Deiz's correspondence, and photographs of Mercedes Deiz's brother-in-law Robert W. Deiz, who was among the U.S. Army Air Forces servicemen known as the Tuskegee Airmen during World War II, and was the model for a 1944 poster for war bonds.