The collection consists of correspondence; technical reports on various aspects of irrigation; reports and surveys of specific irrigation projects throughout California, and in Colorado, Idaho, Montana, Nevada, and North Dakota; and miscellaneous material relating to water costs and requirements, water rights, groundwater and surface water supply, flood control, legislation, dendroclimatology, enclosed lakes, and the Central Valley Project and Feather River Project in California.

The collection consists of correspondence; technical reports on various aspects of irrigation; reports and surveys of specific irrigation projects throughout California, and in Colorado, Idaho, Montana, Nevada, and North Dakota; and miscellaneous material relating to water costs and requirements, water rights, groundwater and surface water supply, flood control, legislation, dendroclimatology, enclosed lakes, and the Central Valley Project and Feather River Project in California.