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Details for Benchmark: QH0631

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N 45° 00.804 W 071° 30.347 (NAD 83)

Altitude: 1112

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

Location:
In ESSEX county, VT View Original Datasheet
Designation:
MONUMENT 519A2
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:
Mark of questionable or unknown stability.

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Found it 10/5/2006 Papa-Bear-NYC found QH0631 (NGS Benchmark)   Visit Log
Found in good condition.

Over the Columbus weekend I headed up to northern New Hampshire for some hiking, benchmarking and a bit of sight seeing. All the recovered marks (and all but one of the Not Founds) were boundary markers of one sort or another. Some were state boundary markers, some were US-Canada boundary markers and some were IBC triangulation stations (used when the US-Canada border was surveyed in 1915-1916).

Here's a trip report: (visit link)
And here's a set of photo albums: (visit link)

This particular monument was originally a post like the others but was repeatedly damaged and repaired, and was replaced by a disk just this year.

The first picture is nice. It shows all 4 stations I recovered at this location this day.

Logged with the NGS as "Recovered in good condition" on 10/12/2006.

Photos:
photoQH0631 "MONUMENT 519A2" Beecher Falls, Vermont
photoQH0631 "MONUMENT 519A2" Beecher Falls, Vermont
Closeup of disk. It was placed just this year.
photoQH0631 IBC Monument 519-A2, Beecher Falls, VT
Looking along the border at all 4 stations recovered today.

Documented History (by the NGS)

1/1/1906 by IBC (MONUMENTED)
DESCRIBED BY INTERNATIONAL BOUNDARY COMMISSION 1906 STATION MARK--AN INTERMEDIATE POST OF GRANITE OR CONCRETE ABOUT 16-1/2 INCHES HIGH SET IN A CONCRETE BASE 3X3X3 FEET DEEP. NOTE--THIS DESCRIPTION HAS NOT BEEN FIELD CHECKED.
1/1/1906 by IBC (GOOD)
RECOVERY NOTE BY INTERNATIONAL BOUNDARY COMMISSION 1906 RECOVERED IN GOOD CONDITION.
1/1/1927 by IBC (GOOD)
RECOVERY NOTE BY INTERNATIONAL BOUNDARY COMMISSION 1927 (FHB) A NEW ELEVATION WAS DETERMINED FOR MONUMENT IN 1927.
1/1/1965 by IBC (POOR)
RECOVERY NOTE BY INTERNATIONAL BOUNDARY COMMISSION 1965 (HGD) REPAIR WORK WAS CARRIED OUT ON MONUMENT IN 1965.
1/1/1971 by IBC (POOR)
RECOVERY NOTE BY INTERNATIONAL BOUNDARY COMMISSION 1971 (NP) REPAIR WORK WAS CARRIED OUT ON MONUMENT IN 1971.
12/1/1992 by VTAT (POOR)
RECOVERY NOTE BY VERMONT AGENCY OF TRANSPORTATION 1992 MARK RECOVERED IN POOR CONDITION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in May 1998.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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