This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Intake diversion dam. Diversion of Salt River through intake tunnel. Shovel and bulldozer on right placing silt over... NARA . Scope and content Photograph from Volume One of series of photo albums documenting the construction of Roosevelt Dam Stewart Dam and other related work on the Salt River Project in Arizona General notes