71U019 (Geodetic Survey of Canada) - Thorold, Ontario - Canadian Benchmarks on Waymarking.com

There are two benchmarks on the east face of concrete guardrail at top of west end of tunnel, along Ormond St South - 17U019 to the north, and 17U020 to the south

The station report is from the NRC Passive Control Network database:

Site Identification

Name	Province	NTS map sheet	Unique Number	Provincial Identifier	Network
71U019	Ontario	030M03	71U019		43079

Horizontal Data

Coordinates scaled from map

Geographic

Latitude	Longitude
43° 6' 54.0"	79° 11' 52.8"

UTM

Zone	Easting (metres)	Northing (metres)	Scale
17	646605.463	4775161.431	0.99986

Vertical Data

Vertical Datum	Elevation (m)	Order	Gravity (mGal)	Published	Project ID
CGVD2013 (2010.0)	179.680	1st	980378.75	2013	H13ML1311
CGVD28	180.129	1st	980447.44	1980	VA6U71
IGLD85	180.152	1st	980619.90	1992	IGLD85AP92

The CGVD2013 height reported in the Vertical Data table is approximate because it is calculated from historical levelling data and not from the combination of GNSS and a geoid model.

Station Marker

Marker Type	Inspected in	Established by	Status	Comments
Permanent agency marker	1971	Canadian geodetic survey - nrcan	Good	None

Location

Thorold thorold tunnel, under st. Lawrence seaway, tablet in east face of concrete guardrail at top of west end of tunnel, opposite department of transportation and communications service building, 6.7 m from centre line of road, 85 cm below top of concrete rail, 40 cm south of north end.

Unique Designation: 71U019 Marker Type: Benchmark Disk Condition: Good

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