=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Chesapeake Bay Br T 960/070 RLR(1986) is 14.8m below BM NO 2 1975
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 21-Dec-2011
Using NOAA data the RLR diagram has been reviewed. Primary benchmark remains NO 2 1975 15.914m above gauge datum.