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Details for Benchmark: LY1171

N 41° 20.917 W 075° 12.750 (NAD 83)

Altitude: 1772.02

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

Location:
In PIKE county, PA View Original Datasheet
Designation:
S 234
Marker Type:
bench mark disk
Setting:
in a boulder
Stability:
May hold, but of type commonly subject to surface motion.

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Found covered with 1/2" of dirt.

[Photos:]
photo1
photo2

Found in good condition on sept 12, 2005
My coordintes at this benchmark
N 41° 20.918
W 75° 12.765

Used coordinated given by Zhanna and found easily. The Benchmark was in good condition although covered with mud and growth.

N 41° 20.915 W 075° 12.769

Our main adventure for the morning was a scenic hike along beautiful Wallenpaupack Creek, during which we found the “Little Falls Cache”. On our way home, we decided to extend our morning's adventures by searching for a few benchmarks along Route 390. This mark was easy to locate using the historic description, which remains accurate. Our only additional observation was that the “blacktop road” forming the Y intersection with Route 390 is named Shiney Mt. Road, according to the sign at the intersection. Distances and directions to the reference objects matched those given in the 1959 description. The mark is in good condition.

[I]A report on the condition of this station was submitted to NGS, along with the following recovery note:[/I]

Recovered in good condition. Shiney Mt. Road forms the Y intersection with Route 390. Handheld GPS WAAS-corrected coordinates for the station are 41 20 55.02(N) 075 12 45.90(W).

Zhanna

[Photos:]
photoLY1171, Pike County, PA
photoEye-level view of the mark on the boulder.
photoFacing E, toward Route 390.
N 41° 20.917 W 075° 12.765

[B]Recovered in good condition.[/B]

This second order vertical control station was found as described. The historical direction is still viable. Shiney Mt. Road forms the Y-intersection with Rt. 390. At the station a Garmin GPSmap76 receiver with remote active antenna was used to record WAAS-corrected coordinates which were 68.5 feet from the scaled coordinates listed in the NGS datasheet. The mark is well exposed, in good condition, and the stamped designation is legible.

~Rich in NEPA~

[Photos:]
photoLY1171, "S 234 1959," Pike County, PA.
photoGPSr and the station mark.
photoEyelevel view of station mark and setting.
photoOrientation view, facing east and Rt. 390.

Documented History (by the NGS)

1/1/1959 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1959 2.2 MI N FROM PROMISED LAND. 2.25 MILE NORTH ALONG STATE HY. 390 FROM THE PROMISED LAND STATE RANGER HEADQUARTERS, SET 1 FOOT SOUTH OF THE NORTH SIDE OF A 4 1/2 FOOT BY 4 1/2 FOOT BOULDER PROJECTING ABOUT 6 INCHES, 58 FEET WEST OF THE CENTERLINE OF THE HIGHWAY, 42 FEET WEST OF THE WEST END OF A STONE HEADWALL FOR A PIPE CULVERT UNDER THE ROAD, ABOUT 100 YARDS SOUTH OF A Y INTERSECTION OF A BLACKTOP ROAD.

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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