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Details for Benchmark: LX6409

N 41° 15.170 W 072° 51.191 (NAD 83)

Altitude: 13

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

Location:
In NEW HAVEN county, CT View Original Datasheet
Designation:
LOOP
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:
Most reliable and expected to hold position/elevation well.

Reference Points

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Was able to find the station and 2 RM's. Homeowner helped to point them out.

[Photos:]
photobenchmark LX6409 station
photobenchmark LX6409 close
photobenchmark LX6409 RM1
photobenchmark LX6409 RM1 close
photobenchmark LX6409 RM2
photobenchmark LX6409 RM2 close

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1933 (GCM) THIS STATION IS LOCATED ON PAYNES POINT ON THE N SIDE OF WHAT IS KNOWN AS FARM RIVER CUT. IT IS ON THE HIGHEST PART OF THE LEDGE AT THIS POINT AND IS ABOUT 6 METERS FROM HIGH WATER LINE. STATION AND REFERENCE MARKS ARE STANDARD BRONZE DISKS WEDGED IN A DRILL HOLE IN OUTCROPPING BEDROCK, AS DESCRIBED IN NOTES 2 AND 12A. REFERENCE MARK NO. 1 IS IN A SEPARATE OUTCROPPING, BEARS N (MAGNETIC) AND IS 10 METERS SOUTHERLY OF THE W CORNER OF THE PROMINENT WHITE HOUSE WITH RED GABLES. REFERENCE MARK NO. 2 IS IN A SEPARATE OUTCROPPING, BEARS N 42 DEG E (MAGNETIC) AND IS 6.15 METERS SOUTHERLY OF THE S CORNER OF PORCH ON RED GABLED HOUSE. IT IS NEARLY ON LINE WITH SOUTHEASTERLY FACE OF THIS PORCH. HEIGHT OF LIGHT ABOVE STATION MARK 4 METERS.
01/01/1977 by NGS (SEE DESCRIPTION)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 (DAH) THE STATION MARK AND REFERENCE MARKS 1 AND 2 WERE RECOVERED AS DESCRIBED IN GOOD CONDITION. THE JOHNSON FLAGPOLE AND DARROW ROCKS FLAGPOLE WERE OBSERVED ON AND PROVIDED GOOD CHECKS. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN ABOUT 5 MILES EAST OF NEW HAVEN.
01/20/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (SW) RECOVERED IN GOOD CONDITION.

Control Text

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