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Details for Benchmark: QH0499

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N 45° 18.287 W 071° 05.359 (NAD 83)

Altitude: 2523

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

Location:
In COOS county, NH View Original Datasheet
Designation:
MON 476 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

Navigation

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Write note 9/27/2009 Papa-Bear-NYC posted a note for QH0499 (NGS Benchmark)   Visit Log
I was passing through to go up and look for QH0497 "BON DURBAN" and just said hello to this station.

Photos:
photoQH0499 MON 476 IBC, Pittsburg, NH
Found it 8/26/2006 Papa-Bear-NYC found QH0499 (NGS Benchmark)   Visit Log
I just got back from a 5 day hiking trip to the Boundary Range - the ridge line that forms the 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.

This station is a boundary monument that is about 1/2 mile west of Monument 475. we accessed the border from East Inlet Road in Pittsburg New Hampshire. We drove in on this dirt logging road about 13 miles towards Rhubarb Pond and had to walk the last mile and cross a beaver dam at the outlet of the pond. With map and compass we headed for a saddle on the border ridge at Monument 476. We arrived in about half an hour only slightly east of that point, and then headed over to monument 475, about a half mile away, and then returned and worked westward along the border.

The monument is the old style monument with a cast iron post set in a concrete base.

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

Photos:
photoQH0499 "MON 476 IBC", NH/Quebec border
photoQH0499 "MON 476 IBC", NH/Quebec border
Close up of the base showing the monument number.
photoQH0499 "MON 476 IBC", NH/Quebec border
An IBC bench mark (non NGS) set in the base of Monument 476.

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 May 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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