A commemorative bench mark celebrating 150 years of continuous operations by the San Francisco tide gauge, the longest running series of tidal observations inthe Americas.
2/13/2019 1:38:00 PM
Photographer: Captain Albert E. Theberge
Affiliation: NOAA Corps (ret.)
Date: 2004 June 30
Location: California, San Francisco
Subject: Coastline
Subject: West Coast California