=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Cordova             821/020 RLR(1974) is 13.2m below BM11
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 02-Apr-1992
South Alaskan Coastline Earthquake Prone - e.g. Magnitude 9.2 Earthquake of 28 March 1964 - See Savage and Plafker, JGR,96(B3), 4325-4335, 1991
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 10-Dec-1998
Data for 1949-53 received from University of Hawaii Sea Level Center
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 23-Nov-2011
Using information from the NOAA website the RLR diagram has been revised. Previous Primary benchmark 11 10.025m above gauge datum no longer appears in the NOAA reports. Secondary benchmark 4050 E 1982 7.498m above gauge datum appears both on the original RLR diagram and the NOAA report. Current Primary benchmark is 4050 Q 1998 16.455m above gauge datum.