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Details for Benchmark: KU1121

N 40° 47.183 W 073° 47.667 (NAD 83)

Altitude: 23.31

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

Location:
In QUEENS county, NY View Original Datasheet
Designation:
F 341
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

Must Read!

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Learning about benchmarks this past week! Thanks

Also found the mark from afar. Yes, a closeup would be tricky, but could be possible.

[Photos:]
photoF341 - Benchmark Disk 3

Yesterday I spent a long day in Queens, NY. I walked the "341" level line, surveyed in 1952 from "A 341" in Bayside to "K 341" at the Whitestone Expressway, with a side trip around Fort Totten and a little extra jaunt in Flushing. It was about 12 miles on foot and I was exhausted by the end. But I found 8 marks out of 14 (with about 8 others I couldn't get to) which is pretty good.

The second half of the "341" series was not good. I found just one out of the 5 (and one other mark not in the series). The problem was that these were set on piers in the middle of the parkway, which is virtually inaccessible, and along which there is now a 3 foot high concrete median barrier which has covered the marks which were set just 2 feet above the ground.

This mark was the one exception, as it was originally mounted 4 feet above the roadway, rather than 2 feet as the rest were. You can see from the photo it is just a foot or so above the concrete median.

To get to the mark, I hopped over the fence at the northwest corner of the Utopia Parkway overpass and scrambled down the embankment to the side of the north lanes of the Cross Island Parkway. But I was not about to run across these busy lanes, so I was satisfied with a distance shot. I looked at the mark with my binoculars and I am satisfied that it is the proper mark.

Although this is technically a first find, I'll put a sad face instead of my usual smiley face because of the lack of a closeup.

First to Find.

[This entry was edited by Papa-Bear-NYC on Saturday, May 06, 2006 at 5:21:31 PM.]

[Photos:]
photoKU1121 F 341, Whitestone, Queens NY
View of the north face of the center pier of the Utopia parkway overpass, seen from the side of the north lanes.
photoKU1121 F 341, Whitestone, Queens NY
Sorry, this is the best you're going to get, unless you have a long lens on your camera and a tripod..

Documented History (by the NGS)

01/01/1952 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1952 AT NEW YORK. AT NEW YORK, IN BOROUGH OF QUEENS, AT THE OVERPASS OF UTOPIA PARKWAY OVER CROSS ISLAND PARKWAY, 13 FEET SOUTH OF SOUTH EDGE OF NORTH LANE OF CROSS ISLAND PARKWAY, SET VERTICALLY IN THE NORTH FACE OF CENTER PIER OF OVERPASS, 9 1/2 FEET EAST OF WEST END OF CENTER PIER AND 4 FEET ABOVE GROUND.

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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