Correspondence, engineering reports, blueprints, photographs, notes, and news clippings relating to Derleth's work as a consulting
engineering on the Golden Gate Bridge, Carquinez Bridge, San Francisco-Oakland Bay Bridge, a proposed Richmond-San Rafael
Bridge, Antioch Bridge, U.S. Engineer Foundation's Committee on Arch Dam Investigation, Spring Valley Water Company, and others.
Also includes materials on masonry structures (chiefly dams), the Hetch Hetchy Project, Lake Spaulding Dam, and other bridges
and dams in California and elsewhere.
Copyright has not been assigned to the Water Resources Collections and Archives. All requests for permission to publish or
quote from manuscripts must be submitted in writing to the Head of Archives. Permission for publication is given on behalf
of the Water Resources Collections and Archives as the owner of the physical items and is not intended to include or imply
permission of the copyright holder, which must also be obtained by the reader.