The majority of the records in this series reflect the work of Cliff Olsen and the Nevada Test Site (NTS) Containment Evaluation Panel between 1971 and 2006, with some records on underground nuclear tests conducted prior to the panel's inception. Also included in this series are volumes of underground nuclear testing symposia, one undated and unidentified photograph of a nuclear test site, United States government and government contractor publications, reports, treaties, and hardened epoxy samples.

The mining series (1902-1998) documents the family’s mining interests and records. The series focuses on the family’s involvement in Nevada mines, such as the Yellow Pine Mining Company, the Root Zinc Mining Company, and the Columbia, St. Anthony, and St. Patrick mines, which include surveys, field notes, patents, journals, ledgers, maps of the mining sites, and correspondence. The series also contains similar documents for various mines and potential mining sites, as well as the family’s legal files.