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Details for Benchmark: LX6238

N 41° 16.082 W 072° 37.907 (NAD 83)

Altitude: 3

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

Location:
In NEW HAVEN county, CT View Original Datasheet
Designation:
CHIPMAN
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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Easily found station & RM2.

[Photos:]
photobenchmark LX6238 Station Chipman
photobenchmark LX6238 Station Chipman close
photobenchmark LX6238 RM2
photobenchmark LX6238 RM2 view

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1933 (GCM) THIS STATION IS ON THE POINT OF ROCKS AT THE W SIDE OF WHAT IS LOCALLY KNOWN AS CANOE HARBOR. THE ROAD LEADING TO BASSETTS SOUND VIEW GRILL LEADS TO THE IMMEDIATE VICINITY OF THE STATION. THE STATION IS ABOUT 5 METERS FROM HIGH WATER LINE TO SOUTHWARD AND ABOUT 17 METERS FROM HIGH WATER LINE TO EASTWARD. THE SE CORNER OF A GREEN COTTAGE BEARS N 50 DEG W (MAGNETIC) AND IS 61 METERS DISTANT. THE SE CORNER OF BASSETS PLACE BEARS N 10 DEG W (MAGNETIC) AND IS 68 METERS DISTANT. THE LEDGE IS MUCH BROKEN UP ON THIS POINT. THERE ARE SEVERAL OUT-LYING ROCKS, BARE AT ALL STAGES OF THE TIDE. STATION MARK IS A STANDARD BRONZE DISK WEDGED IN A DRILL HOLE IN OUTCROPPING BEDROCK AND SURROUNDED BY A TRIANGLE CHISELED IN THE ROCK. REFERENCE MARK NO. 1 AND REFERENCE MARK NO. 2 ARE STANDARD BRONZE DISKS SET IN OUTCROPPING BEDROCK AS DESCRIBED IN NOTES 2A, AND 12A. REFERENCE MARK NO. 1 IS IN A SEPARATE OUTCROPPING INSHORE OF STATION. IT BEARS N 35 DEG W (MAGNETIC). REFERENCE MARK NO. 2 IS IN A PART OF THE SAME LEDGE AS THE STATION. IT BEARS N 60 DEG E (MAGNETIC). HEIGHT OF LIGHT ABOVE STATION MARK 4.9 METERS.
01/01/1961 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (GFW) STATION AND R.M.S WERE RECOVERED IN GOOD CONDITION. THE STATION IS STAMPED, CHIPMAN 1933 AND THE R.M.S ARE STAMPED, CHIPMAN NO 1 1933 AND CHIPMAN NO 2 1933. THE DISTANCES WERE CHECKED AND FOUND TO BE CORRECT. THE ORIGINAL DESCRIPTION BY G.C.M. IN 1933 IS COMPLETE AND ADEQUATE.
01/01/1974 by CTGS (SEE DESCRIPTION)
RECOVERY NOTE BY CONNECTICUT GEODETIC SURVEY 1974 TO REACH STATION FROM THE INTERSECTION OF NECK RD. AND U.S. 1 IN THE TOWN OF MADISON. GO S.W. ON NECK RD. FOR 0.55 MILE. TURN LEFT AND GO S ON TWIN COVE RD. FOR 0.36 MILE. THEN GO EASTERLY FOR 0.23 MILE TO STATION. R.M. 1 IS IN A SEPARATE OUTCROPPING INSHORE OF STATION. IT BEARS N 35 W (MAG.). IT IS 31.5 FT SW OF SE CORNER AND 35 SE OF SW CORNER OF HOUSE. R.M. 2 IS IN A PART OF THE SAME LEDGE AS THE STATION. IT BEARS N 60 E (MAG.). IT IS 42 FT W OF H.W.L. AND 37 FT S OF H.W.L. R.M. 1 TO R.M. 2 127.7 FT.

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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