=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991 Washington 960/076 RLR(1971) is 10.1m below BM B1 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 12-Oct-2011 Using data from NOAA the RLR diagram has been revised. Previous Primary benchmark BM B1 4.971m above gauge datum no longer appears in the NOAA listings. Primary benchmark is now TIDAL NO 1 1951 4.115m above gauge datum.