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Details for Benchmark: QH0628

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N 45° 00.804 W 071° 30.314 (NAD 83)

Altitude: 1099

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

Location:
In ESSEX county, VT View Original Datasheet
Designation:
MONUMENT 518A
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 QH0628 (NGS Benchmark)   Visit Log
Found in poor 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 stands just east of Route 253 by the customs station in Beecher Falls, Vermont. It is rather rusty, the cast iron is split along one edge, and the concrete base has disintegrated at ground level. It does appear to be stable and plumb however, so it could be restored. I notified the IBC of its condition.

There is a curoius metal clad wooden post just east of it which resembles a monument, but I could find no information as to what it is.

Logged with the NGS as "Recovered, poor condition" on 10/12/2006

First to Find!

Photos:
photoQH0628 "MONUMENT 518A", Beecher Falls, VT
Area view showing this monument in the foreground and Monument 518 down the hill near Halls Stream
photoQH0628 "MONUMENT 518A", Beecher Falls, VT
Closeup showing condition of monument
photoQH0628 "MONUMENT 518A", Beecher Falls, VT
View showing the wooden post just to the east of this monument.
photoQH0628 "MONUMENT 518A", Beecher Falls, VT
Closeup of the wooden post.

Documented History (by the NGS)

1/1/1937 by IBC (MONUMENTED)
DESCRIBED BY INTERNATIONAL BOUNDARY COMMISSION 1937 (JGH) STATION MARK--A CAST-IRON POST ABOUT 38 INCHES HIGH SET IN A CONCRETE BASE 3X3X3 FEET DEEP. NOTE--THIS DESCRIPTION HAS NOT BEEN FIELD CHECKED.

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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