Many stations on the Gulf coast have large values for September 1961.
Documentation added 1994-07-14
For a discussion of submergence near to Eugene Island and Grand Isle/Bayou Rigaud, see Emery and Aubrey (Sea Levels, Land Levels and Tide Gauges), 1991, Springer-Verlag, page 40.
Documentation added 2012-02-09
Eugene Island is an Historic station last data received is that for 1974. Although the station still features in the Historic Data in the NOAA website there is now very little benchmark and datum information available.