Prints of the Gorge Diversion Dam date from 1948 to 1950 and are composed of two series. The “G” negative numbers document early work on Gorge Diversion Dam, from November 1948 to April 1949. These images document work done by Cascade-Phillips Company. The images are 5 ½ x 7 inches and are mounted in a photograph album with descriptions, dates, and negative numbers.

The second series are “GDD” negatives and document the project from 1949 to 1950. Some prints from both series (primarily the GDD series), as well as a narrative history of the Gorge Diversion Dam project compiled from Project Engineer diaries, make up the unpublished volume “Gorge Diversion Dam: Record of Construction” which is included in this series. Also included in the album are “GT” series prints.