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Leveling on the "low line" at Hoover Dam.
Note Hoover Dam in background.
Level party of Emmett Sheridan
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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
Category: Geodesy/Leveling/
• High Resolution Photo Available
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