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Details for Benchmark: LY0149

N 41° 44.050 W 074° 11.367 (NAD 83)

Altitude: 666.55

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

Location:
In ULSTER county, NY View Original Datasheet
Designation:
X 255
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Recovered this benchmark disc after digging and troweling leaves, dirt and debris from the top of the culvert headwall. The paint marks on the highway shoulder indicating the station location are no longer in evidence, apparently having weathered away from the elements. The coordinates that I came up with are as follows: N 41 deg, 44.073 x W 074 deg, 11.371.

Recovered this station disc after digging and troweling leaves, dirt and debris from the top of the culvert headwall. The paint marks mentioned in Zhanna's log are no longer in evidence and must have weathered away from the elements. The coordinates that I came up with for the location of this station are: N 41deg,44.073 x W 074deg,11.371.

Recovered in good condition.

N 41° 44.065 W 074° 11.370

After finding the nearby [URL=http://www.geocaching.com/seek/cache_details.aspx?guid=e6999bfd-a4d3-4a13-95fe-9ab48c21e24c]A Bear in the Gunx[/URL] geocache, Rich and I took a stroll across the highway from the Mohonk Preserve Visitors' Center to search for this mark. We found it well-preserved on a culvert that is, unfortunately, not so well-preserved. The area directly surrounding the mark seems solid, though the concrete on other areas of the headwall is crumbling. The mark was found as described using the historic description, except that we were unable to locate any definite indication of “highway survey station number 44+00”. The station designation has been painted in yellow on the highway shoulder just east of the guardrail, with an arrow indicating the direction to the mark.

[I]A report on the condition of this mark has been submitted to NGS.[/I]

Zhanna

[Photos:]
photoLY0149, Ulster County, NY
photoEye-level view of the mark on culvert headwall.
photoThe large box culvert, mark indicated.
photoLooking SW along Routes 44 & 55.
photo“X 255” painted on the highway shoulder.
N 41° 44.068 W 074° 11.369

[B]Recovered in good condition.[/B]

This second order vertical control station is set in the top of the northwest headwall for a concrete box culvert under Rt. 44. The historical description was sufficiently helpful in finding the station but the “highway survey station number 44+00” was not seen. The station is almost directly across and a little south of the entrance to the Mohonk Preserve Visitors Center, and centered along a section of guardrail. At the station a Garmin GPSmap76 receiver with remote active antenna was used to record WAAS-corrected coordinates which were 109.8 feet from the scaled coordinates listed in the NGS datasheet. The mark is well exposed, in good condition, and the stamped designation is legible. The concrete setting, however, is showing signs of severe deterioration.

~Rich in NEPA~

P.S. Caution! There is plenty of poison ivy in the area, so be careful!

[Photos:]
photoLY0149, "X 255 1942," Ulster County, NY.
photoGPSr and the station mark.
photoEyelevel view of station mark and setting.
photoView, facing south along Rt. 44 (mark indicated).

Documented History (by the NGS)

1/1/1942 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1942 9.7 MI SE FROM KERHONKSON. THIS MARK IS ALONG HIGHWAY 44 ABOUT 9.7 MILES SOUTHEAST OF THE RAILROAD STATION AT KERHONKSON, ULSTER COUNTY, ABOUT 0.3 MILE SOUTH OF A V SHAPED CURVE, SET IN THE CENTER OF THE TOP OF THE NORTHWEST HEADWALL OF A LARGE CONCRETE BOX CULVERT, 25.5 FEET NORTHWEST OF THE CENTER LINE OF THE HIGHWAY, 4 1/2 FEET LOWER THAN THE PAVEMENT, AT HIGHWAY SURVEY STATION NUMBER 44+00, AND IS A STANDARD DISK SET IN A DRILL HOLE.
1/1/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (GWM) RECOVERED IN GOOD CONDITION.
1/1/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (CBS) RECOVERED IN GOOD CONDITION.
1/1/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (CBS) RECOVERED IN GOOD CONDITION.
4/3/1997 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1997 RECOVERED IN GOOD 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.
  • 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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