The collection consists of a February 18, 1914 report titled, “Report on Yuba River Diversion Project for Yuba Consolidated Gold Fields” from H.R. Edwards, Chief Engineer of Hammon Engineering Company to W.P. Hammon, managing director of the Yuba Consolidated Gold Fields. The report covers the estimated costs of the construction work necessary to accomplish the un-watering of the river bed above Hammonton and to generate adequate Hydro-electric power to supply the needs 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. Additional accompanying materials include a variety of maps, plans and photos that help to illustrate the project and support the findings of the report.