Leveling on the "low line" at Hoover Dam.
Note Hoover Dam in background.
Level party of Emmett Sheridan
Image ID: theb1826, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Hoover Dam area, Nevada
Photo Date: 1941
Credit: C&GS Season's Report Sheridan 1941
• High Resolution Photo Available