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500 lb. stone being lowered for Brown Valley Base.
98th Meridian survey.
Jasper Bilby on right
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Image ID: theb1545, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: South Dakota
Photo Date: 1903
Credit: NOAA, John Hayford Album
Category: Geodesy/Marks/
• High Resolution Photo Available
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