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Details for Benchmark: KY0204

N 40° 55.367 W 080° 08.533 (NAD 83)

Altitude: 1363.73

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

Location:
In BUTLER county, PA View Original Datasheet
Designation:
TT 10 EFB
Marker Type:
survey disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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In good shape. Surveyed by Edward F Burzynski. 1921 - 2000.

Recovered in good condition at N 40° 55.378 W 080° 08.538. Replace references to County Road 10143 with State Highway 488.

[Photos:]
photoKY0204(TT 10 EFB) - Portersville PA
photoKY0204 - Eye level
photoKY0204 - Looking S on US 19

Found northeast of the intersection as described. The "small maple tree" is now a rather large maple tree.

[Photos:]
photoKY0204
photoWide View

Documented History (by the NGS)

01/01/1956 by USGS (MONUMENTED)
01/01/1960 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1960 AT PORTERSVILLE. AT PORTERSVILLE, IN THE SOUTH END OF THE CITY WHERE COUNTY ROAD 10143 JUNCTION WITH U.S. HY. 19, 45 FEET NORTH EAST OF BLACKTOP ROAD 10143 (CENTERLINE OF JUNCTION OF U.S. 19) 2 FEET NORTH WEST OF TELEPHONE POLE NO. 8, 45 FEET SOUTH OF SMALL MAPLE TREE, 54 FEET EAST OF THE CENTERLINE OF U.S. HY. 19, STANDARD BENCH MARK DISK SET IN TOP OF CONCRETE POST PROJECTING ABOUT 3 INCHES.

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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