"#119 U. S. Government Railroad and
Highway - leading to Dam Site -from Hoover Point. Sept. 3, 1931.
#186 California-Nevada Power Co., Substation, near Dam-site. Government Railroad and Government Highway from Boulder City to Dam.
#205 Six Companies' Railroad grade down Canyon between Cape Horn and Upper Portals No. 1 and No. 2 - Sept. 18, 1931.
#215 Six Companies' track laying crew in
Hemenway Wash, between Government Junction and Junction City - Sept. 19, 1931."