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Details for Benchmark: KW1889

N 40° 17.200 W 077° 08.400 (NAD 83)

Altitude: 639.96

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

Location:
In CUMBERLAND county, PA View Original Datasheet
Designation:
M 152
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Recovered in good condition - location is a few hundered feet W of the intersection where Mountain Rd. leads SW....

[Photos:]
photoM 152 (KW1889) disk - Cumberland County, PA
photoM 152 (KW1889) setting - Cumberland County, PA

Documented History (by the NGS)

01/01/1942 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1942 7.2 MI NE FROM CARLISLE. 7.2 MILES NORTHEAST ALONG STATE HIGHWAY NO. 34 FROM THE POST OFFICE AT CARLISLE, SET IN THE CENTER OF THE SOUTHEAST HEADWALL OF CULVERT NO. 341, 113 FEET WEST OF THE WEST CORNER OF A SMALL RED HOUSE, 63 FEET SOUTHWEST OF TELEPHONE POLE NO. 300, 14.9 FEET SOUTHEAST OF THE CENTER-LINE OF THE HIGHWAY. A STANDARD DISK.
01/01/1952 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1952 RECOVERED IN GOOD CONDITION.

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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