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Details for Benchmark: JV3354

N 39° 56.450 W 077° 33.167 (NAD 83)

Altitude: 875.67

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

Location:
In FRANKLIN county, PA View Original Datasheet
Designation:
F 156
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Recovered in (more-or-less) good condition (note crack in middle pic) - talked w/ property owner who told me he remembered it being set when he was a kid. he also remembered nearby marks being destroyed by highway construction over the years...

[Photos:]
photoF 156 (JV3354) disk - Franklin County, PA
photoF 156 (JV3354) setting - W corner of pump base
photoF 156 (JV3354) area - looking E

This benchmark is on private property. The water
pump is no longer there. If standing on the road, the bm is on then left side of the concrete base closest to the road. I suspect that it can be seen without going onto the property--that is, until the grass starts growing.

Documented History (by the NGS)

01/01/1942 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1942 2.2 MI SE FROM SCOTLAND. 2.2 MILES SOUTHEAST ALONG STATE HIGHWAY 997 FROM THE POST OFFICE AT SCOTLAND, FRANKLIN COUNTY, THENCE 0.7 MILE SOUTHEAST ALONG A BLACKTOP ROAD LEADING FROM THE HIGHWAY TO BLACK GAP, IN THE WEST CORNER OF A CONCRETE WATER PUMP BASE AT D.B. FARNERS NEW BRICK HOUSE, 30 FEET NORTHEAST OF THE CENTERLINE OF THE ROAD, 15 FEET NORTHEAST OF THE SOUTH CORNER OF THE YARD FENCE, AND 14.6 FEET SOUTH OF THE SOUTH CORNER OF THE HOUSE. A STANDARD DISK, STAMPED F 156 1942.
01/01/1979 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1979 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. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
  • 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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