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Details for Benchmark: KU3821

N 40° 47.592 W 073° 51.200 (NAD 83)

Altitude: 23

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

Location:
In QUEENS county, NY View Original Datasheet
Designation:
MANSION 2 RM 1
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

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Thanks to Benmarkhunters direction I was able to find this one.

Finally found it on my third attempt, thanks to Papa-Bear's photo. The mark's 1941 description is incorrect; it's not within the triangular flower plot. Rather, it's across the path from the north point of the flower plot. Also, the grass has grown over several feet of the original path. I used a nearby sewer grate to note where the original path edge would have been, then followed that line around the curve to the marker, which was badly overgrown and covered with grass clippings, but I spotted the corner of the concrete and cleared off the entire concrete and the disk, which was in excellent condition.

[Photos:]
photoMansion 2 RM 1

Grass was too deep, couldn't find this one.

I spent most of the morning plus a little bit of the afternoon in College Point, a part of Queens NY north of Flushing. I was actually there this day to run in the Queens Half-marathon, one of a series of 5 half-marathons organized by the New York Road Runners. The race started and ended in Hermon MacNeil Park (formerly Chisolm Park) which is on the northwest point of land of this peninsula. There are beautiful views across the water of Laguardia Airport with the Manhattan sky line behind, and of the Throgs Neck part of the Bronx to the north which connects to this part of Queens via the Whitestone Bridge.

The park has 4 marks on my list for the day and I did a little scouting before the race, and some further searching afterwards and found all 4 plus the reference marks for this station.

This station is actually a reference mark for "MANSION 2" (see [url=http://www.geocaching.com/mark/details.aspx?Pid=KU3822]KU3822[/url]). Normally reference marks don't get their own PID, but some do and this is one of them.

We found it by pacing off the distance given on the datasheet in the appropriate direction. We found the triangular shaped "flower plot" (now a grassy area) but we were at first stymied. The directions said in the north corner of the area so we searched in the grass at the north end of the triangle. We almost gave up but I spotted the mark on the other side of the walkway, just across from the north end of the triangular area. So it's not in the triangle, it's north of the triangle acoss the walkway.

As with the other 2 disks, this mark was in good condition.

[Photos:]
photoKU3821, MANSION 2 RM1, College Point, Queens NY
View from the east. The triangular "flower plot" (now just grass) is on the left but the mark is to the right (north) of the walkway.
photoKU3821, MANSION 2 RM1, College Point, Queens NY
The disk on its concrete foundation in the grass.
photoKU3821, MANSION 2 RM1, College Point, Queens NY

Not a ref to KU3824, but KU3822 - Mansion 2

Found it.® See Harry's log.

Our first find at MacNeil Park. Very easy to find.

[Photos:]
photoKU3821 Distance Shot
photoKU3821 Overhead Shot
photoKU3821 Close Up Shot
Obviously originally a reference mark (before KU3824 was destroyed - error) for Mansion 2. Now listed as a benchmark. Thank you kc2ixe. I stand corrected. That should have been obvious, shouldn't it?

Documented History (by the NGS)

01/01/1941 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1941 STATION MANSION IS S OF THE EAST RIVER, APPROXIMATELY 1-1/2 MILES W OF THE WHITESTONE BRIDGE, IN THE COLLEGE POINT SECTION OF QUEENS, ON PUBLIC PROPERTY IN THE NW PART OF CHISHOLM PARK, AND N OF THE PARKING AREA WHERE THE MANSION FORMERLY STOOD. IT IS 45.8 FEET E OF THE MOST WESTERLY 24-INCH ELM TREE, AND 62.6 FEET NW OF ANOTHER 24-INCH ELM TREE. STATION DISK, STAMPED MANSION 2, 1940 HAS A STRAP-IRON EXTENSION ON ITS SHANK 14 INCHES LONG AND IS SET IN THE TOP OF A CONCRETE POST 2 FEET SQUARE AT THE TOP, 4 FEET SQUARE AT THE BOTTOM AND 5 FEET DEEP. IT IS FLUSH WITH THE GROUND, AND THERE IS NO UNDERGROUND MARK. REFERENCE MARK NO.1, A STANDARD DISK SET IN CONCRETE, IS SW OF THE STATION AND W OF THE FLAGPOLE, 15.2 FEET NE OF A DRINKING FOUNTAIN IN THE N CORNER OF A TRIANGULAR FLOWER PLOT BETWEEN PAVED WALKS, 6.2 FEET S OF THE SE CORNER OF A CONCRETE BENCH, 17.9 FEET SW OF AN 8-INCH HICKORY TREE, AND 2.1 FEET NE OF THE PAVED WALK. MARK IS FLUSH WITH THE GROUND AND STAMPED MANSION 2, R.M.NO.1, 1940.
01/01/1986 by NOS (GOOD)
RECOVERY NOTE BY NATIONAL OCEAN SERVICE 1986 (RDC) THE STATION WAS RECOVERED AT THIS DATE. THE STATION MANSION 2 1941 WAS ALSO RECOVERED IN GOOD CONDITION AT THIS TIME. HEIGHT OF LIGHT SHOWN WAS 1.5 METERS ABOVE THE MARK. RECOVERED BY R DECROIX.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1999.
  • 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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