Please note: In many cases, the station position in our database is accurate
to only one minute. Thus, the tide gauge may not appear to be on the coast.
St Jean-Port-Joli 970/066 RLR(1973) is 21.8m below BM CLXXVII
Documentation added 2010-08-19
Primary benchmark 1968-1978 is BM CLXXVII. Primary benchmark 1979 onwards BM POJO-2-1967. This does not alter the RLR factor of 6.770m. Last data April 1979.
Data Authority
Canadian Hydrographic Service 615 Booth Street Ottawa Ontario K1A 0E6