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Details for Benchmark: LY2786

N 41° 42.903 W 075° 33.644 (NAD 83)

Altitude: 2692.1

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

Location:
In SUSQUEHANNA county, PA View Original Datasheet
Designation:
TT 24 A USGS 1942
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:
Mark of questionable or unknown stability.

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Found it easily while visiting old tower site :-)

Although I hike to the top of Elk often, I usually bypass the true summit and continue across the slopes and head down. Today I decided to scope out the summit and ended up finding the benchmark accidentally.

[This entry was edited by mtbkr18 on Saturday, December 13, 2008 at 3:18:28 PM.]

Found this on Sunday. Elk Mt had their October Fest. Ride to the top via chair lift. Forgot the GPS however still found this bench mark. See attached pictures.

[Photos:]
photoMagoo and bench mark
photoUSGS DISK
photoHelp or Hinder

Documented History (by the NGS)

01/01/1942 by USGS (MONUMENTED)
DESCRIBED BY US GEOLOGICAL SURVEY 1942 (FBQ) STATION IS LOCATED ABOUT 4 MILES W OF UNION DALE ON THE SUMMIT OF THE N KNOB OF ELK HILL, A VERY PROMINENT, HEAVILY TIMBERED HILL. IT IS 17.79 FEET, 5.422 METERS, SW OF TRIANGULATION STATION ELK AND IS SET IN A DRILL HOLE IN THE CONCRETE STEP AT THE FOOT OF THE STAIRWAY TO THE ELK MOUNTAIN LOOKOUT TOWER. IT IS A STANDARD USGS DISK AND IS STAMPED T T STA NO 24A 1929. STATION WAS LOCATED BY DISTANCE AND DIRECTION FROM TRIANGULATION STATION ELK.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in September 1999.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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