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Details for Benchmark: QH0508

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N 45° 18.909 W 071° 01.524 (NAD 83)

Altitude: 2359

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

Location:
In OXFORD county, ME View Original Datasheet
Designation:
MON 473 IBC
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

Nearest

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Found it 8/25/2006 Papa-Bear-NYC found QH0508 (NGS Benchmark)   Visit Log
I just got back from a 5 day hiking trip to the Boundary Range - the ridge line that forms thr border between the US and Canada along New Hampshire and western Maine. The area is very remote and the only passage in most parts of the area is over dirt logging roads. I drove up Wednesday and crossed over to Woburn Quebec which is a few miles past the Coburn Gore Maine border crossing, where US Route 27 crosses into Canada. I hiked Wednesday afternoon, Thursday and Friday from the Canadian side and then Friday night crossed into Pittsburg New Hampshire where US Route 3 terminates. Saturday morning I was met by a friend and spent Saturday and Sunday morning hiking from the US side.

All of the benchmarks were on or near the border. There were a series of boundary monuments (set in 1845) and a few triangulation stations set by the boundary commision when they did a triangulation of this section in 1915 - 1916.

This station is a boundary monument is on the border about a mile and a half from Twin Peaks and a half mile along the border from monument No. 472. I reached the border on a trail for Marble Mountain near the small town of Notre Dame des Bois, Quebec.

The monument was not the standard cast iron post set in a concrete foundation. It was a newer Granite version with similar markings. Several of the old cast iron posts have been replaced by these granite posts since the 1990s, presumably when the old posts were found damaged.

Logged as "recovered in good condition" with the NGS on 8/29/2006.

Photos:
photoQH0508 "MON 473 IBC", Maine/Quebec border
photoQH0508 "MON 473 IBC", Maine/Quebec border
Close up of the concrete base showing the monument number.

Documented History (by the NGS)

1/1/1845 by IBC (MONUMENTED)
DESCRIBED BY INTERNATIONAL BOUNDARY COMMISSION 1845 CAST - IRON POST, 6 FEET LONG, WHICH IS NOW SET IN A CONCRETE BASE 3 FEET SQUARE WITH THE TOP OF THE CAST - IRON POST RISING 3 FEET ABOVE THE SURFACE OF THE BASE.
1/1/1976 by IBC (GOOD)
RECOVERY NOTE BY INTERNATIONAL BOUNDARY COMMISSION 1976 (HGD) STATION 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 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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