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Details for Benchmark: KU3315

N 40° 41.831 W 073° 51.708 (NAD 83)

Altitude: 184

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

Location:
In QUEENS county, NY View Original Datasheet
Designation:
FOREST PARK
Marker Type:
triangulation station disk
Setting:
set into the top of a round concrete monument
Stability:

Reference Points

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It is a privilege to have found this relic from well over a century ago, and find that it's still in great condition, better than 2/3 of the more modern benchmarks, especially those set in the ground. The GPS coordinates are very accurate, as well. I agree with Papa-Bear about the date stamping on the disk, and I also note that the digit font seems to be the same for the digit "9" in both the 1908 and 1932 dates, though the "1" may not be of the same style (not sure about the serifs on the 1s). Reference mark 1 was easy to find, as well, along the sidewalk. I note that its date of 1932 looks to have been stamped by the identical punches that were used for the main marker. I looked for reference mark 2 on the south side of the road, per the description in the datasheet, and found nothing, but I note that there were three large broken pieces of sidewalk or curbing that appear to be contemporary with the sidewalk around reference mark 1. A metal detector might find a buried marker.

[Photos:]
photoForest Park Benchmark Closeup
photoForest Park RM 1

While checking on one of my caches I came across this Benchmark. Nice to see that it is still there.

[Photos:]
photoUSCGBenchmark

I took Linus to the dog park today and found this rather easily. Looking great after all these years.

[Photos:]
photoThe Benchmark
Looking good!

Looking good after all these years...

[Photos:]
photoClose-up
This is it ladies and gentlemen. It has water in it, since yesterday we had snow...

Found it.®

Easy find while geocaching in Forest Park

[Photos:]
photoKU3315 New York Queens NY Close Up
photoKU3315 New York Queens NY View Northwest

This was a significant find for me as someone interested in NYC history.

This station was one of the primary tringulation stations used in the 1903 survey of NYC. This survey is described in the report [i]Triangulation of Greater New York by the cooperation of New York City and the United States Coast and Geodetic Survey executed 1903 to 1908[/i], which was published by the USC&GS and is available in the NY Public Library. This was the first triangulation survey undertaken by the CGS of a major urban area and was the first city-wide triangulation subsequent to the city's consolidation in 1898.

Aside from some intersection stations such as High Bridge Tower and Saint Patrick's Cathedral, it is the only triangulation station from this survey I have found (there are 2 others I suspect are still there if some serious digging and a metal detection work out). It consists of a USC&GS bolt (we would call it a disk) set in a granite post and anchored in a large chunk of concrete. During the survey, an 84 foot wooden tower was erected over the station to make the observations. I have attached a portion of the primary traingulation map from the original report showing the station. All the other stations shown in this section are lost, although the Prospect Water Tower location was marked by a bolt, still there (see [url=http://www.geocaching.com/mark/details.aspx?Pid=KU3532]KU3532[/url]), which was set when the tower was demolished in 1930.

Not only is the station still in good condition, but 3 of the 4 concrete foundation blocks that supported the original wooden tower are still present.

There are an interestimng set of dates given for this monument. The survey started in 1903 and many of the stations (including this one) were given that date even though a number of them were actually built over the 5 years of the survey. There is a rough "1907" carved in the concrete and I would take this as the best date for the station. There are also 2 dates stamped on the disk: "1908" and "FOREST PARK 1932". I believe these were stamped by the 1932 CGS survey team that set the reference marks. Clearly the "1932" date was a later addition, and I suspect so was the "1908" stamping. For one thing the peculiar curly "9" is the same in both dates.

RM 1 was found as described (with the same peculiar curly "9"). RM 2 was not found, but my measurements put it south of the south sidewalk in the grassy margin, not under the sidewalk, so it may still be there if someone with a metal detector wants to give it a try.

[Photos:]
photoKU3315 "Forest Park" original triangulation map
A portion of the triangulation map from the original report.
photoKU3315 "Forest Park", Queens NY
View of the station standing on the north side of Park Lane in Forest park, opposite the stairway. One of the concrete tower foundations is visible in the back left of the photo. Another more prominent one is just left of where I am standing.
photoKU3315 "Forest Park", Queens NY
View showing the 3 surviving foundation blocks with the station in the center. The 4th foundation block was not found and was probably lost during road work.
photoKU3315 "Forest Park", Queens NY
View of the monument from the north. The meaning of the large carved "W" is unknown, since this was the north, not west side of the monument.
photoKU3315 "Forest Park", Queens NY
View of the monument from the southeast showing the carved "1907".
photoKU3315 "Forest Park", Queens NY
Close up of the granite post and "bolt".
photoKU3315 "Forest Park", Queens NY
Close up of the U.S.C&G.S "bolt". This is an old style marker and the precursor of the disks used later. See the text of my log for comments on the stampings "1908" and "FOREST PARK 1932" which I believe were added in 1932.
photoKU3315 "Forest Park" RM 1, Queens NY
View of Reference Mark No 1, which is on the north edge of the side walk, about 18 yards northeast of the station.
photoKU3315 "Forest Park" RM 1, Queens NY
Close up of reference mark.
photoVintage figure of USC&GS Marking Bolt
This figure is from "Precise Leveling in New York City" by Frederick W. Koop (1914). In the leveling done, they used a few pre-existing triangulation stations as bench marks.

Triangulation disk is in good condition. The 1952 description is most accurate in describing location.

[Photos:]
photobenchmark.jpg

Documented History (by the NGS)

01/01/1903 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1903 (ATM) THIS CONSISTS OF AN 84-FOOT TRIPOD AND SCAFFOLD IN FOREST PARK. IT IS 20 FEET N OF PARK LANE AND ABOUT 225 FEET E OF THE EASTERLY LINE OF FOREST PARKWAY. THE STATION IS MARKED BY THE REGULAR U.S.C. AND G.S. BRASS MARKING BOLT SET IN A GRANITE POST 6 BY 6 BY 24 INCHES SET IN CONCRETE 3 BY 3 BY 4 FEET. THE EXACT POINT IS A SMALL HOLE 1/100 FOOT IN DIAMETER DRILLED IN TOP OF BOLT. THE STATION IS REACHED BY TRAIN ON LONG ISLAND RAILROAD TO UNION COURSE STATION, THENCE WALKING N TO FOREST PARK.
01/01/1931 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1931 (RWW) RECOVERED IN GOOD CONDITION FROM THE ORIGINAL DESCRIPTION. THIS STATION IS IN THE FOREST PARK SECTION OF QUEENS, ON THE N SIDE OF PARK LANE ROAD IN THE SOUTHERN PART OF THE FOREST PARK GOLF COURSE JUST NE OF THE CLUBHOUSE. STATION IS NOW MARKED BY THE CROSS CUT ATOP A 6- BY 6- BY 24-INCH GRANITE POST SET IN A 3- BY 3- BY 4-FOOT MASS OF CONCRETE. NO REFERENCE MARKS WERE PLACED. REFERENCE AND WITNESS MEASUREMENTS WERE TAKEN AS FOLLOWS-- NORMAL TO S CURB-EDGE ON N SIDE OF PARK LANE 6.72 METERS. NORMAL TO S EDGE OF CONCRETE SIDEWALK TO N 3.57 METERS. TO HOLE IN LARGE BOULDER TO E 19.30 METERS. TO NAIL IN ROOT OF 24-INCH TULIP TREE TO NE 14.73 METERS. TO CROSS OUT IN ELECTRIC LIGHT POST TO SE 10.58 METERS. TO NAIL IN ROOT OF 18-INCH TULIP TREE TO SW 5.31 METERS. TO NAIL IN ROOT OF 18-INCH TULIP TREE TO NW 5.02 METERS.
01/01/1932 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1932 (FLG) RECOVERED AS MARKED AND DESCRIBED. SINCE THIS STATION WAS FIRST LOCATED THERE HAS EVIDENTLY BEEN ANOTHER ROAD CONSTRUCTED, ABOUT MIDWAY BETWEEN PARK LANE AND JAMAICA AVENUE, WHICH IS CALLED PARK LANE S. THE STATION IS ON HIGH GROUND ABOUT 200 YARDS E AND N OF THE CLUBHOUSE AND MIDWAY BETWEEN PARK LANE AND THE FOOTPATH PARALLELING THIS ROAD AND N OF IT.
01/01/1932 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1932 (CDM) STATION RECOVERED AS DESCRIBED IN GOOD CONDITION. TWO NEW REFERENCE MARKS WERE ESTABLISHED AND STAMPED FOREST PARK 1932. REFERENCE MARK NO.1 IS NE OF STATION SET IN CONCRETE SIDEWALK. REFERENCE MARK NO.2 IS ESE OF STATION SET IN CONCRETE BLOCK ON S SIDE OF PAVED ROAD. TO REACH FROM THE INTERSECTION OF NORTHERN BOULEVARD AND MAIN STREET IN FLUSHING RUN 0.3 MILE W ON THE LATTER AND TURN S ON KISSENA BOULEVARD FOR 4.2 MILES TO HILLSIDE AVENUE, TURN RIGHT HERE AND RUN 1.1 MILES TO METROPOLITAN AVENUE. RUN 0.9 MILE W ON THE LATTER UNTIL A SIGNAL LIGHT IS REACHED AT AN ENTRANCE TO FOREST PARK. AT THE SIGNAL LIGHT TURN LEFT AND FOLLOW THE WINDING PARK ROAD 1.9 MILES TO THE STATION SITE. THE STATION IS LOCATED 20 FEET N OF PARK LANE BETWEEN THE ROAD AND A FOOTPATH, 200 YARDS E OF THE GOLF CLUBHOUSE, AND 0.2 MILE FROM AN OPEN AIR THEATRE.
01/01/1932 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1932 (JPL) MARK FOUND AS DESCRIBED AND AMENDED BY F.L.G., ADDITIONAL INFORMATION AND DESCRIPTION AS GIVEN BY RECOVERY NOTE OF C.D.M. FOUND TO BE CORRECT. I FEEL IT NECESSARY TO ADD THE FOLLOWING--THE MARK IS SET IN A GRANITE POST 6 INCHES SQUARE. THIS POST IS SURROUNDED BY A LAYER OF CONCRETE ABOUT 3 FEET IN DIAMETER. THE MARK ITSELF WHICH IS BRONZE OR BRASS IS APPROXIMATELY 3 INCHES IN DIAMETER, HAS AN OUTER RAISED LIP ABOUT 1/4 INCH WIDE AND IN THE CENTER A SMOOTH CIRCULAR SURFACE THE SIZE OF A DOLLAR WITH THE INSCRIPTION FOREST PARK 1932. THE CONCRETE AROUND THE GRANITE POST HAS A ROUGH INSCRIPTION 1907.
01/01/1952 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1952 (JB) STATION RECOVERED IN GOOD CONDITION. DESCRIPTION IS CORRECT AND ADEQUATE WITH THE FOLLOWING ADDITIONS AND DELETIONS-- STATION LOCATED ON N SIDE OF PARK LANE, OPPOSITE A CONCRETE STAIRWAY. THIS STAIRWAY STARTS AT INTERSECTION OF PARK LANE SOUTH AND FOREST PARKWAY AND ENDS AT PARK LANE. REFERENCES TO CLUBHOUSE SHOULD BE DELETED. THEY ARE INCORRECT. THE CONCRETE BASES FOR THE TOWER ARE INTACT.
01/01/1971 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1971 (EP) STATION AND RM 1 RECOVERED IN GOOD CONDITION AS DESCRIBED. RM 2 NOT RECOVERED, PROBABLY COVERED BY SIDEWALK PAVING. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN 0.5 MILE NORTH OF WOODHAVEN.
01/01/1975 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1975 (EP) THIS STATION WAS RECOVERED IN GOOD CONDITION AS DESCRIBED. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN AT WOODHAVEN.

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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