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Details for Benchmark: EE0428

N 34° 51.200 W 085° 15.983 (NAD 83)

Altitude: 733.95

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

Location:
In WALKER county, GA View Original Datasheet
Designation:
G 119
Marker Type:
bench mark 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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Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
01/01/1950 by TVA (MARK NOT FOUND)
DESCRIBED BY TENNESSEE VALLEY AUTHORITY 1950 2 MI SE FROM CHICKAMAUGA. 2.0 MILES SOUTHEAST ALONG THE CENTRAL OF GEORGIA RAILWAY FROM THE STATION AT CHICKAMAUGA, 140 FEET SOUTHEAST OF THE SOUTHEAST END OF PLATE-GIRDER BRIDGE NO. 433.5 OVER CHICKAMAUGA CREEK, 20 FEET NORTHEAST OF THE CENTERLINE OF THE TRACK, AND IN THE NORTHWEST CORNER OF A FIELD SOUTH OF THE BRIDGE. A STANDARD DISK, STAMPED G 119 1934 AND SET IN THE TOP OF A CONCRETE POST PROJECTING 6 INCHES ABOVE GROUND.
01/01/1972 by NGS (MARK NOT FOUND)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1972 MARK NOT FOUND.
01/01/1975 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1975 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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