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.
Lewes, Delaware 960/085 RLR(1971) is 10.2m below BM36
Documentation added 2011-08-11
Using data extracted from the NOAA website the RLR diagram has been re-drawn. The Primary benchmark now appears to be NO 20 1975 3.99m above the gauge datum. The previously used PSMSL benchmark BM36 4.651m above gauge datum no longer appears on the NOAA website.