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Details for Benchmark: QF0751

N 45° 10.807 W 067° 15.023 (NAD 83)

Altitude: 30

Coordinates may not be exact. Altitude is SCALED and location is ADJUSTED. (more info)

In WASHINGTON county, ME View Original Datasheet
Marker Type:
NGS Benchmark
setting not listed - see description

Reference Points

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Found while getting the "Rubbermaid" cache.

Found this benchmark while looking for the [Rubbermaid] cache!

This entry was edited by mike'n'marie on Wednesday, 06 July 2011 at 01:17:43 UTC.

My wife and I took a 10 day vacation to Down East Maine and to the Bay of Fundy. With the myriad of stations in that area I had to be selective in what I went to look for (after all this was a vacation, not a benchmarking trip). I decided to go after two sorts of marks: boundary markers of various sorts, and triangulation stations which where part of the survey for the Eastern Oblique Arc, done in this area in the 1850s. A surprising number of these marks have survived in this area.

The most common type of boundary marker in this area is a range marker. These occur in pairs (a rear marker and a front marker) and the idea is by sighting from the rear to the front and into the bay, you will determine the position of the spot in the water that marks the boundary (which runs down the middle of Passamaquody Bay).

The other type are traditional triangulation stations of which a fair number were set on both sides of the border when the boundary was reestablished and surveyed in 1913-1919. There are no actual boundary monuments in this section since the border follows the bay and the St. Croix river and all the official "turning points" are virtual, as we would now say.

This station is a CGS disk set on a rock in a park-like area on the river just south of downtown Calais. The stem of another mark (QF0752) is in the same rock. A third mark, a drill hole nearby, is apparently lost.

To reach the area, take a right on Steamboat Street from Route 1 as you get into Calais. Park at the end and walk south along the shore about 100 yards.

photoQF0751 - BIG TREES TABLET, Calais ME
The location is a park like area on the river adjacent to a golf course.
photoQF0751 - BIG TREES TABLET, Calais ME
The rock with the two marks. The tablet is on the right.
photoQF0751 - BIG TREES TABLET, Calais ME
Closeup of mark.
photoDe Monts description

Documented History (by the NGS)

01/01/1909 by CGS (MONUMENTED)

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in March 1998.
  • The orthometric height was scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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