Details for Benchmark: TD1331

N 49° 00.032 W 097° 34.195 (NAD 83)

Altitude: 833

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

Location:
In PEMBINA county, ND View Original Datasheet
Designation:
BOUNDARY MON 816 CD US
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

Must Read!

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Came to Altona for Thanksgiving with A & G's grandma and grandpa and decided to pop out to Gretna to grab our first ever benchmark!! A & G really liked being in two countries at the same time! Thanks for the fun!!

BeesCook and I drove up pretty close to this one from cdn side for the visit/find. Ditch was dry enough to cross and get good pics. In perfect shape. We had our passports on us just in case...

[Photos:]
photoClose up

After safely navigating the farmers field in my vehicle, made the thankfully dry approach to the benchmark.

[Photos:]
photoIMG_0571

This marker is best approached from the Canadian side of the border. If the roads are in good condition, which they were on this day, you can drive to just a little over a hundred yards from it.

The marker appears to be in good shape even though it is inside a drainage ditch which must get filled with water at least once a year.

[Photos:]
photoTD1331
photoTD1331 & me

Don't dare cross the line now!

[Photos:]
photoTD1331 IBC 816
MY FIRST 1870'S OBELISK
photoTD1331
BASE RENEWED 1991

The kids were thrilled to have one foot in each country.

[Photos:]
photoMarker
photoU.S. of A.
photoCanada

Documented History (by the NGS)

1/1/1911 by IBC (MONUMENTED)
DESCRIBED BY INTERNATIONAL BOUNDARY COMMISSION 1911 (JJM) THE GENERAL TYPE OF CAST - IRON MONUMENT OF 1872-76 ARE HOLLOW IRON CASTINGS IN THE FORM OF A TRUNCATED PYRAMID 8 FEET HIGH, 8 INCHES SQUARE AT THE BOTTOM, 4 INCHES SQUARE AT THE TOP, WITH A SOLID PYRAMIDAL CAP, AND A HEAVY FLANGE AT THE BOTTOM. UPON OPPOSITE FACES, THE SOUTH AND THE NORTH, ARE CAST, IN RAISED LETTERS 2 INCHES HIGH, THE INSCRIPTIONS---CONVENTION OF LONDON---AND ---OCTOBER 20, 1818---. THESE MONUMENTS HAD BEEN SET ALONG THE SOUTHERN BOUNDARY OF MANITOBA BY THE COMMISSION OF 1872-76. EIGHTY FIVE OF THESE, CORRESPONDING TO THE PRESENT NUMBERING 748 TO 832, WERE SET WEST OF RED RIVER. ABOUT 60 WERE FOUND TO BE IN GOOD CONDITION IN 1911. THEY WERE FILLED WITH CONCRETE AND RESET IN CONCRETE BASES WITH THE TOP OF THE OBELISK 5 FEET ABOVE THE GROUND. THE BROKEN ONES AND ALSO THOSE THAT HAD ORIGINALLY BEEN SET EAST OF RED RIVER WERE DESTROYED AND REPLACED BY NEW CAST - IRON MONUMENTS OF THE STYLE MADE IN 1908-13. THE MONUMENTS CAST IN 1908-13, BEARS THE FOLLOWING INSCRIPTIONS, CAST IN RAISED LETTERS--ON THE NORTH FACE---CANADA---, ON THE SOUTH FACE ---UNITED STATES---, ON THE EAST FACE---CONVENTION OF 1818---, ON THE WEST FACE---TREATY OF 1908---. THE INSCRIPTIONS READ VERTICALLY FROM BOTTOM TO TOP. THE NUMBER OF THE MONUMENT IS OUTLINED WITH DRILL HOLES TO THE FACE OF THE SHAFT. THE MONUMENTS SET IN THE---MERIDIAN LINE---WERE TURNED SO THAT---UNITED STATES---APPEARS ON THE EAST SIDE AND---CANADA---ON THE WEST SIDE. THESE MONUMENTS WERE FILLED WITH CONCRETE AND SET IN CONCRETE BASES WITH THE TOP OF THE SHAFT 5 FEET ABOVE THE GROUND. THEY WERE USED IN 1908-13 TO MARK THE LINE FROM MONUMENT 303 EASTWARD TO THE NORTHWESTERNMOST POINT OF LAKE OF THE WOODS EXCEPT WHERE THE CAST - IRON MONUMENTS OF 1872-76 WERE RESET AS HERETOFORE DESCRIBED.
1/1/1911 by IBC (MONUMENTED)
1/1/1976 by IBC (GOOD)
RECOVERY NOTE BY INTERNATIONAL BOUNDARY COMMISSION 1976 (FXP) RECOVERED IN GOOD CONDITION IN 1938, 1946 AND 1976. IN 1963 IT WAS RECOVERED BULLDOZED OUT. IT WAS REBUILT IN ITS ORIGINAL POSITION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 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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