Benchmark - 57C9521

Benchmark Number 1-1957
Established In 1957
Condition GOOD
Latitude 52.3591
Longitude -131.1807
Reference Benchmark No
Vertical Datum Code UNKNOWN
Description On the north side of Copper Islands, on the southeast shore of a cove, about 610 metres from the light, 9 metres north from a blazed tree with a cross of nails, 0.9 metre above highwater, set in a rocky ledge, a bronze tablet marked: "Hydrographic Service, Canada, BM 1 1957".
Date Elevation Status Vertical Datum Code
2011-07-17 6.151 ACTIVE CD
N/A 3.444 ACTIVE CGVD2013
2014-06-12 -7.954 HISTORICAL NAD83_CSRS
2014-06-10 3.107 HISTORICAL CGVD28_HTv2_0
2017-06-11 2.454 ACTIVE CGVD28_HTv2_0
2017-06-11 -8.607 ACTIVE NAD83_CSRS