Leveling to tide staff and water's edge at extreme low tide.
Bubbler gauge orifice at right lower edge of photo.
Improper installation necessitated leveling to assure observing lowest low water
. Tidal bench mark leveling work off of DAVIDSON
Image ID: theb2404, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection
Location: Southeast Alaska
Photo Date: 1979
Credit: Lieutenant Linda Mezger, NOAA Corps
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of the U.S. Department of Commerce, National Oceanic & Atmospheric
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May 12, 2014