=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 29-Jul-1993
Many stations on the Gulf coast have large values for September 1961.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 04-Jun-2001
Vaca Key            940/089 RLR(1990) is 8.2m below BM NO 1 1975
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 21-Dec-2011
Using NOAA data the RLR diagram has been reviewed. Primary benchmark is now 3970 N 1999 1.724m above gauge datum. There is now no reference to previous Primary benchmark NO 1 1975 2.073m relative to gauge datum (TGZ).