This primary source comes from the Records of the Office of the Chief of Engineers.
National Archives Identifier:
7450537Full Citation: Water Supply System - Foot Bridge Carrying Pupcrete Pipeline to Damsite (12) ; 9/23/1958; Records of the Office of the Chief of Engineers, Record Group 77. [Online Version, https://www.docsteach.org/documents/document/water-supply-system-foot-bridge-carrying-pupcrete-pipeline-to-damsite-12, May 30, 2023]