Article “The California dredger as an instrument of conservation” with rejection letter from Olaf P. Jenkins, Chief, State of California Department of Natural Resources Division of Mines, California journal of mines and geology.

The records in this collection were discovered in the offices of the Western Water Company in 2003, and pertain to Yuba Consolidated Gold Fields. The records dated 1901-1929, include legal documents, deeds, business records, correspondence, reports, acknowledgements, proposals, agreements, financial statements, estimates, propositions, resolutions, and a mining claim patent.

This collection includes photographs, photo albums, negatives, and blueprints pertaining to the operations of Wendall P. Hammon, Yuba Construction Company and Yuba Consolidated Gold Fields. Photographs, albums, negatives and blueprints relate to the dredging, manufacturing, and mining activities of the Hammon enterprises.

The collection consists of a report from H.R. Edwards, Chief Engineer of Hammon Engineering Company to W.P. Hammon, managing director of the Yuba Consolidated Gold Fields. Included in the report are sections on railroad possibilities and an irrigation scheme. Appendices include a history and appraisal of the debris situation, a geologist's report, a report on hydraulic development, and a copy of the Caminetti Act.