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Details for Benchmark: KU1431

N 40° 46.817 W 073° 57.667 (NAD 83)

Altitude: 88.44

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

Location:
In NEW YORK county, NY View Original Datasheet
Designation:
C 339
Marker Type:
bolt
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Found as described

[Photos:]
photoBolt
photoFor reference

Found during our trip in NYC

Thanks for showing.

Found in good condition after visiting the MET.

[Photos:]
photoC339
Bolt

Found this bolt BM as described and in good condition.

[Photos:]
photoKU1431
photoKU1431 w/GPSr
photoKU1431 in situ

Found in good condition as described. It seems that the NGS repurposed a Koop 1909 survey copper bolt, counterstamping it C 339. This is the second such example of this that I have found. The other was a brass tablet on a public school in the Bronx. But tablets are much larger than bolts, so there was much more room for the NGS stampings, without defacing the original 1909 markings.

[Photos:]
photoC339 Disk
photoC339 Setting

Found during a vacation in NY. We saw many beautiful and interesting places. Greetings from Czech Republic.

[Photos:]
photoMetropolitan museum of art 1
photoMetropolitan museum of art 2

Trouvé durant mon dernier entrainement pour le marathon de new-York 2014.
cela ma porté chance, j'ai réussi a terminer le marathon le lendemain

Found during my last training for the marathon of New York 2014.
it brought my luck, I managed to finish the marathon the next day

Trouvé avec Dav008
Found with Dav008

Found this Bolt BM while doing the Virtual at MET

Found before solving the requirements for the virtual cache nearby.

had to find this very interesting BM. surprised I didn't see it in previous searches. but there are so many?

Das Team dellwo war auf einem tollen Urlaub in den USA. Nach New York und Boston besuchten wir noch Philadelphia und Washington D.C. Eine tolle Reise mit vielen unterschiedlichsten Eindrücken. Nebenbei konnten wir so auch noch einige Caches loggen.

Unser erster Benchmark (-Cache). Da mussten wir etwas suchen, da uns die Koordinaten zunächst woanders hinführten. Doch im Hinterkopf hatten wir ein Umgebungsfoto, so dass wir schließlich fündig werden konnten.

Danke für den Benchmark.
Grüße dellwo

x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x

The team dellwo was on a great holiday in the USA. After New York and Boston, we visited Philadelphia and Washington D. C. . A great trip with many different impressions. Besides, we were able to even log some caches.

Our first benchmark (cache). Since we had to look something, because the coordinates initially led up elsewhere. But in mind, we had a photo of the environment, so that we finally were able to be successful.

Thanks for the benchmark.
Greetings dellwo

[Photos:]
photoOverview
photoDetail

Found in good condition

[Photos:]
photoCameraZOOM-20120924135012805

Just a beautiful day to be out and about.

Found this benchmark during my business trip to New York, thanks!
Greetings from Germany!

[Photos:]
photoBenchmark NY - Central Park 3

Found this one during my walk through New York City.

Refind for benchmarking contest.

[Photos:]
photoKU1431 New York New York Close Up
photoKU1431 New York New York View Downward

Found this one on a visit to the area, and showed it to my students. Terrific location, of course!

Found it while doing stone faces.

I was curious about this one because of its spot, so i decided to try to find it.
After some search i got to the right corner and found it.

Found it

Found this very interesting station no problem. Was so bitterly cold I just snapped this stupid picture and went home; will go back at some point and make a better one.

[Photos:]
photoKU1431 (C339)

Observed during a whirlwind tourist's visit with my family to Manhattan. This was a 'targeted' item for me, as I'd enjoyed reading Papa-Bear-NYC's descriptions around the island documenting the historical background of various marks. We went on to enjoy a too-brief visit to the Met, after counting "Stone Faces" out front...

[Photos:]
photoKU1431 C 339 (closeup) Bolt on Met Museum, NYC
photoKU1431 C 339 (view S) Bolt on Met Museum, NYC
This slightly crooked view looks south down 5th Avenue along the face of the Metropolitan Museum of Art, across the mark (set in the top of the 'foundation' corner seen at bottom center of photo) at the northeast corner of the Museum.

While I was counting faces, Muggle Michelle was looking for this. : ) I was actually done first!

Found it after we counted the faces of GC4D7A

[Photos:]
photoKU1431.jpg

Found on a miserable rainy night after we visited the Met. Wife stayed in the museum while I got soaked looking for the bolt. I didn't even think to look for one of Papa-Bear's descriptions of nearby marks. If I had I would have known I walked by it 3 time. Sigh.

[Photos:]
photoKU1431 C 339, Manhattan, NY
Easy find, even in the rain. I didn't notice it had stamping until I took a look at the photo. It was just too dark and miserable that night.
photoKU1431 C 339, Manhattan, NY location
I freaked out one of the guards (the guard shack is visible in Papa's photos) who thought my flash was lightning. Glad it wasn't! The night was miserable enough and we finally decided on a cab back to the hotel after getting drenched trying to get to the nearest subway stop.

[b]Historical Note[/b]

The Metropolitan Museum of Art was built in 1902. From 1909 to 1913 the City of New York surveyed the entire city and set over 1000 bench marks. This was the first city wide survey using a consistant datum. 3 of these marks were set on the Metropolitan.

One of these original NYC marks is "C 339" which was originally designated by the city as NYBE+A #859. When the USC&GS surveyed the "339" series in 1952, they just reused the old city benchmark when they got here, rather than setting a standard USC&GS disk. They simply stamped "C 339" on the top of the old copper bolt. It was originally stamped "B M" (vertically) with a dot in the center, iike this: http://gallery.backcountry.net/albums/papabear_2006_benches_types/aac.thumb.jpg - you can still see the "M" and the dot.

One of the other two old city benchmarks still survives on the Met. It's #858, a chiseled cross. To find it, simply walk south along the Fifth Avenue side of the museum towards the main entrance. Just before you get to the steps, you will see the cross on the upper granite base of the first set of two ornamental columns before the main entrance. It's near the top of the granite stone, about 2 feet above the walkway and the horizontal bar of the cross coincides with a chiseled line which goes along the entire granite base. The cross is about 6" from the end of the base (the north end). See the pictures.

The 3rd original mark set by the city (#857, a copper bolt) has been lost. It was set on one of the steps leading up to the main entrance, but the original steps were completely replaced in a 1975 renovation.

This cross is not in the NGS database, so consider it "extra credit".

[Photos:]
photoNYBE+A #858 Metropolitan Museum of Art, NYC
This shows the two ornamental columns just north of the steps. The mark is near the top of the granite base near the far right end.
photoNYBE+A #858 Metropolitan Museum of Art, NYC
This shows the granite base of the columns. If you look closely, you'll see the cross near the top right of the granite base, about an inch from the top and 6 inches from the right end. There is a little outline in chalk that someone has put on the mark (not me).
photoNYBE+A #858 Metropolitan Museum of Art, NYC
Here's a closeup of the chiseled cross.
photoNYBE+A #859 aka KU1431, Metropolitan Museum, NYC
A closeup of "C 339" shows the "M" from the original stamping and the dot (inside the lower part of the second "3"). If you look closely you may see a remnant of the original "B" under the "C" on the top. This is the only instance I have seen where the USC&GS "usurped" someone else's benchmark.

Had business at the loading dock at the MMA today so this was an easy one. Located in good condition.

MOCO

Photos for benchmarking contest

[Photos:]
photoKU1431 with GPS
photoKU1431 from a distance
photoKU1431 Area Shot

In good weather we had the luck to find this one as described - thanks for the hints in previous logs.

Found as described.

The mark is mounted in the granite footing (which goes along the entire side of the building), at the corner.

[Photos:]
photoKU1431 "C 339", 84th & 5th, NYC
photoKU1431 setting, 84th & 5th, NYC
View of the corner of the building. The mark is mounted on the granite footing.
photoKU1431 Museum, 84th & 5th, NYC
View of the museum looking south along Fifth Avenue from 84th Street.

It's there. Right on the corner of the ankle-high "foundation." The bolt head is about a half inch across, maybe a bit more. Not very conspicuous, but completely unobstructed as soon as you look for it.

Found it® walking past the Met with Harry Dolphin.

I had to wait months for the cleaning/rehabilitation on the North Wing of the Metropolitan Museum to be finished before I could find this one.

[Photos:]
photoKU1431

Documented History (by the NGS)

Unknown by RBNF (MONUMENTED)
01/01/1952 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1952 IN NEW YORK. IN NEW YORK, IN BOROUGH OF MANHATTAN, AT INTERSECTION OF 5TH AVENUE AND EAST 84TH STREET, 60 1/2 FEET NORTHWEST OF NORTHWEST CURB OF 5TH AVENUE, 13 FEET SOUTHWEST OF PROLONGED SOUTHWEST CURB LINE OF EAST 84TH STREET, IN THE TOP AND 1 FOOT WEST OF EAST CORNER OF GRANITE FOUNDATION OF METROPOLITAN MUSEUM OF ARTS BUILDING. COPPER BOLT STAMPED BY THIS PARTY.

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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