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Details for Benchmark: LZ0559

N 41° 47.200 W 076° 47.117 (NAD 83)

Altitude: 1094.21

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

Location:
In BRADFORD county, PA View Original Datasheet
Designation:
Z 80
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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This benchmark was probably destroyed when the side walks were in replaced....

[Photos:]
photoVan Dyne Civic Building

I'm quite sure I was in the right spot, but I could not find this marker. The building now houses a bank; there were some new sidewalks in the area and it looks like the doorstep may have been replaced and the marker removed/destroyed. Neat building, though!

Zhanna

[Photos:]
photoAt least I knew I had the right building...
photoThat was unexpected.
photoThe most (only?) remarkable structure in Troy.

Documented History (by the NGS)

01/01/1935 by CGS (MONUMENTED)
01/01/1968 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1968 AT TROY. AT TROY, BRADFORD COUNTY, ON U.S. HIGHWAY 6, AT THE NORTH SIDE OF THE VAN DYNE CIVIC BUILDING, (POST OFFICE AND LIBRARY), 33 FEET WEST OF THE NORTHEAST CORNER, AT THE WEST END OF THE ENTRANCE, IN THE TOP OF THE STONE DOORSTEP, AND ABOUT 6 INCHES ABOVE GROUND. A STANDARD DISK, STAMPED Z 80 1935.

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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