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Details for Benchmark: QH0562

N 45° 03.398 W 071° 28.837 (NAD 83)

Altitude: 1880

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

Location:
In COOS county, NH View Original Datasheet
Designation:
HILL TABLET IBC
Marker Type:
survey disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

Must Read!

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I spent a productive 4 day weekend in Northern New Hampshire and Vermont in late September. From Friday noon till Monday noon. The weather on Friday and Monday was great, but Saturday and Sunday were rainy. But luckily we escaped the worst of the rain which came late in the day for both Saturday and Sunday.

The targets were all boundary monuments and related marks: Boundary Monuments, Reference Monuments and Triangulations stations used in the boundary survey done from 1914-1919. The Reference Monuments were not in the NGS database, so I include them as "extra credit" stations logged with the nearest NGS station.

I arrived Friday around noon after a drive from the Boston area and explored the lower part of Halls Stream Road, which starts in Beecher Falls (part of Canaan Vermont) and goes up along the east side of the stream (which forms the US / Canada boundary) into New Hampshire.

This station is about a mile up on the east side of Halls Stream Road. Dirt roads will take you up the hill and get you to within about 1/4 mile of the station. A short bushwhack got me to the area indicated by my GPS. There was a large rock outcrop there, about 5 ft x 15 ft and about 5 ft high. This was the prime suspect. There was actually a rather large tree growing right on top of this rock, whose roots snaked down on the sides of the rock. I was initially afraid this tree was sitting on my mark, but I was in luck. Looking at the rock I thought "Now where would I put the disk on that rock?". My first guess was just a bit south of the tree where the rock had a nice surface, So I scraped away some moss and dirt, and Bingo, there it was. All evidence of a pasture, described in the description, were gone. This area was covered by second growth timber.

This was 3 for 3 of these small IBC disks for the day, so this was certainly one of my lucky days. And it was another -

First to Find!

As an "extra credit" find for adventurous souls, I have included photos of [b]Reference Monument 512[/b], which sits right on the west bank of Halls Stream behind an old farm meadow just off Halls Stream Road. For those interested, the coordinates are N 45° 04.014' W 71° 29.850'

10 of these cast iron monuments were set in the 1840s along the sides of the stream. Technically they are not "Boundary Monuments", since the boundary goes down the middle of the stream, but "Reference Monuments", since they serve as references to the turning points in the stream as laid out by the surveyors. Of the original 10, only 6 remain, and after this long weekend, I had found 3 of the 6. I'll find the others next year!

[Photos:]
photoIBC Reference Monument 512, Pittsburg, NH
Closeup of Reference Monument 512.
photoIBC Reference Monument 512, Pittsburg, NH
The Reference Monument with Halls Stream behind. A bridge, long gone, used to cross the stream just upstream (north) of the monument.
photoIBC Reference Monument 512, Pittsburg, NH
View from in front of the house across the field to the station. The route is not directly across the field, but follows an old farm road around to the right (west) which then turns south.
photoIBC Reference Monument 512, Pittsburg, NH
The station is on the property belonging to this farm house (unoccupied) on the west side of the road. It is in the back of the field near the stream, to the southwest of the house.
photoQH0562 "HILL TABLET", Pittsburg NH
Closeup of station. "U.S.&C.B.SURVEY" stands for "United States and Canada Boundary Survey", which took place in 1914-1919.
photoQH0562 "HILL TABLET", Pittsburg NH
The disk is exposed after a bit of moss and dirt was scraped away.
photoQH0562 "HILL TABLET", Pittsburg NH
View of the rock outcrop with the tree growing on top.

Documented History (by the NGS)

01/01/1915 by IBC (MONUMENTED)
DESCRIBED BY INTERNATIONAL BOUNDARY COMMISSION 1915 (JEM) IN PITTSBURG TOWNSHIP, 3-1/2 MILES NORTH OF BEECHER FALLS, VT. ON THE UPPER EDGE OF THE HILL PASTURE OF THE FIRST FARM ON THE ROAD FROM THE VAN DYKE FARM ACROSS THE DIVIDE TO INDIAN STREAM VALLEY. IT IS NEAR THE TOP OF THE HILL, ABOUT 1100 FEET SOUTHEAST OF THE FARM BUILDINGS AND THE ROAD AND ABOUT 130 FEET FROM THE EDGE OF THE WOODS. STATION MARK--THE MARK IS A STANDARD BRONZE DISK SET IN A LARGE OUTCROP OF LEDGE ROCK, 41.79 FEET FROM THE STATION. THE AZIMUTH FROM THE REFERENCE MARK TO STATION---FALL---IS 130 DEGREES 15 MINUTES AND TO STATION---HILL---IS 265 DEGREES 02 MINUTES.

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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