=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 13-Jan-1998 National Tidal Facility SEAFRAME station =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 25-Aug-2010 Supplying authority have confirmed tide gauge benchmark KIR 1 is 3.5334 m above tide gauge zero. RLR (2009) is defined as 8.8 m below KIR 1