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Details for Benchmark: KW2082

N 40° 06.833 W 077° 17.050 (NAD 83)

Altitude: 587.17

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

Location:
In CUMBERLAND county, PA View Original Datasheet
Designation:
587 USGS
Marker Type:
survey disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Recovered in poor (or worse) condition in a ditch just NW of the crossing. Description should put it SE, but topo maps put it to the NW..there is a ridge that could be possibly be an old railroad bed...but I think it would've been out of use long before 1956..

Took pics to submit to NGS..

[Photos:]
photo587 USGS (KW2082) disk - Cumberland County, PA
photo587 USGS (KW2082) setting - view looking E
photo587 USGS (KW2082) area - view looking NE

Documented History (by the NGS)

Unknown by USGS (MONUMENTED)
01/01/1952 by CGS (GOOD)
DESCRIBED BY COAST AND GEODETIC SURVEY 1952 5.5 MI SW FROM MOUNT HOLLY SPRINGS. 5.5 MILES SOUTHWEST ALONG THE READING COMPANY RAILWAY FROM MOUNT HOLLY SPRINGS, CUMBERLAND COUNTY, 98 FEET NORTHEAST OF MOORS MILL STATION, 2.8 FEET SOUTHEAST OF THE SOUTHEAST RAIL OF THE EAST BOUND TRACK, AND IN THE BASE OF A WATERSTAND. A U.S. GEOLOGICAL SURVEY STANDARD DISK, STAMPED 587.

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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