The collection consists of project files and research files compiled by J. W. Johnson during his career as Professor of Hydraulic Engineering and as a professional consulting engineer.

This collection contains photographs, negatives, and slides taken by Stephen J. Wayne, a local photographer from the Inland Empire region of Southern California. Images in the collection primarily reflect the landscape of Riverside and the greater Inland Empire during the later 20th century, and include depictions of local events, residents, architecture, and nature.