=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Tsawwassen          822/085 RLR(1974) is 9.6m below BM1-1960
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 12-Jul-1993
Tsawwassen          822/085 RLR(1974) is 9.6m below BM1-1960