=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
N.Spit,Humboldt Bay 823/024 RLR(1986) is 10.7m below BM NO 9 1937
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 21-Dec-2011
Using NOAA data the RLR diagram has been reviewed. Primary benchmark remains as NO 9 1937 9.205m above gauge datum (TGZ).