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Details for Benchmark: LX0928

N 41° 23.667 W 073° 04.400 (NAD 83)

Altitude: 92.13

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

Location:
In NEW HAVEN county, CT View Original Datasheet
Designation:
93 W
Marker Type:
survey disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

Must Read!

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Saw it again Monday morning. I used to work at the Seymour PO, and I've seen this many times.

Found as described. Good condition.

[Photos:]
photobenchmark LX0928
photobenchmark LX0928 close

I can't tell you how many times I walked past this thing and didn't know it was there.

[Photos:]
photobenchmark w/GPS

Found this one at 4:30 am. It is very close to the entrance of the US post office in Seymour, CT.

[Photos:]
photoLX0928 at the Seymour post office in CT
photoLX0928 At the Seymour post office in CT
photoLX0928 At the Seymour post office in CT

Documented History (by the NGS)

01/01/1922 by USGS (MONUMENTED)
01/01/1935 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1935 IN SEYMOUR. AT SEYMOUR, NEW HAVEN COUNTY, AT THE CROSSING OF MAIN AND DE FOREST STREETS, AT THE FRONT STEPS OF THE POST OFFICE, IN THE TOP OF THE TOP STEP BEHIND A COLUMN, 7 FEET EAST OF THE CENTER OF THE MAIN ENTRANCE, AND ABOUT 8 FEET HIGHER THAN THE MAIN STREET ROADWAY. A UNITED STATES GEOLOGICAL SURVEY STANDARD DISK, STAMPED 93 W 1922.
01/01/1982 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1982 RECOVERED IN GOOD CONDITION.
01/01/1985 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1985 RECOVERED IN GOOD CONDITION.
01/01/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (JBB) RECOVERED IN GOOD CONDITION.
01/01/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (PJB) RECOVERED IN GOOD CONDITION.
01/01/1988 by USPSQD (POOR)
RECOVERY NOTE BY US POWER SQUADRON 1988 (JAC) MARK RECOVERED IN POOR CONDITION.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (g = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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