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Details for Benchmark: KF0528

N 39° 18.183 W 097° 42.250 (NAD 83)

Altitude: 1366.44

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

Location:
In OTTAWA county, KS View Original Datasheet
Designation:
N 171
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
01/01/1960 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1960 5.6 MI NE FROM DELPHOS. 3.8 MILES EAST ALONG STATE HIGHWAY 41 FROM UNION PACIFIC RAILROAD STATION AT DELPHOS, THENCE 1.8 MILES NORTH ALONG A PAVED HIGHWAY (FORMERLY U.S. HWY. 81), AT A CONCRETE BRIDGE OVER HENRY CREEK, IN THE TOP OF THE NORTHWEST ABUTMENT.

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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