Portneuf 970/087 RLR(1974) is 12.0m below BM 79L006
Documentation added 2010-08-23
Data for the period 1960-2008 was referred to datum IGLD85 with a RLR factor of 5.273m. For 2009 onwards data was referred to Chart Datum with a RLR factor of 4156m.
Documentation added 2015-07-27
This year, rather than just sending the latest year of data, the complete dataset has been supplied. This has highlighted some differences in the data. From communications in the correspondence file for 2002 it appears that the Oceans and Fisheries meant to supply revised data for the stations supplied. This did not happen. The complete dataset includes these data revisions. Therefore, the whole dataset has now been re-entered.
Documentation added 2016-10-20
Primary benchmark for Portneuf has changed from BM 79L006 to BM PONF1.
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