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Details for Benchmark: PD0693

N 44° 49.076 W 066° 57.425 (NAD 83)

Altitude: 0

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

Location:
In WASHINGTON county, ME View Original Datasheet
Designation:
RANGE MARK 42 IBC 1919
Marker Type:
range marker
Setting:
setting not listed - see description
Stability:

Must Read!

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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).

I didn't know what these things looked like. Now I do. The rear markers were large concrete pyramids about 6 feet high. The front markers used to be a smaller version of the rear markers but these had mostly been replaced by a steel triangle painted red-orange mounted on two steel legs. In the middle was a concrete piling with a disk which marked the spot of the original marker. I guess we would call this a reset. A red-orange steel triangle has been attached to the front of the rear markers (probably this was done when the front markers were rebuilt) with a hole cut to show the original 1919 bronze plaque.

This marker was a rear marker. It was reached by a short bushwhack from the road. The Topo map shows a road there, but it is overgrown. As the picture shows, the line between the rear and front markers has been cleared so they must still use these things.

[Photos:]
photoPD0693 - RANGE MARK 42 IBC 1919, Lubec ME
Rear marker 42 looking at it's front.
photoPD0693 - RANGE MARK 42 IBC 1919, Lubec ME
Looking down from the rear marker to the front marker.

Documented History (by the NGS)

1/1/1919 by IBC (FIRST OBSERVED)
DESCRIBED BY INTERNATIONAL BOUNDARY COMMISSION 1919 (JH) STATION IS THE BACK RANGE MARK, RANGING INTERNATIONAL BOUNDARY COURSE 11 - 12, AND IS LOCATED ON THE SIDE HILL ON THE N SIDE OF WEST QUODDY HEAD ABOUT A 1/2 MILE NW OF WEST QUODDY HEAD LIGHT. THE STATION IS ABOUT 130 METERS SSE, INSHORE AND UPHILL FROM RANGE MARK 41, AND ABOUT 100 METERS DOWNHILL AND N FROM THE ROAD. STATION IS IN DENSE TIMBER. STATION MARK IS A STANDARD RANGE MARK.
1/1/1946 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1946 (NWS) STATION IS THE BACK RANGE MARK, RANGING INTERNATIONAL BOUNDARY COURSE 11-12, AND IS LOCATED ON THE SIDE HILL ON THE N SIDE OF WEST QUODDY HEAD ABOUT A HALF MILE NW OF WEST QUODDY HEAD LIGHT. THE STATION IS ABOUT 130 METERS SSE, INSHORE AND UPHILL FROM RANGE MARK 41, AND ABOUT 100 METERS DOWNHILL AND N FROM THE ROAD. STATION IS IN DENSE TIMBER AND CONSIDERABLE CUTTING WAS REQUIRED TO OPEN THE RANGE IN 1946. STATION MARK IS A STANDARD RANGE MARK.
1/1/1972 by IBC (GOOD)
RECOVERY NOTE BY INTERNATIONAL BOUNDARY COMMISSION 1972 (FXP) RECOVERED IN GOOD CONDITION.

Control Text

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

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