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Details for Benchmark: CL1033

N 32° 58.583 W 083° 43.450 (NAD 83)

Altitude: 340.16

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

Location:
In MONROE county, GA View Original Datasheet
Designation:
K 239
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Documented History (by the NGS)

01/01/1958 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1958 3.9 MI N FROM HOLTON. ABOUT 3.9 MILES NORTH ALONG THE SOUTHERN RAILWAY FROM ARKWRIGHT POWER PLANT AT HOLTON, ABOUT 3.8 MILES SOUTH OF CROSSING OF STATE HIGHWAY 18 AT DAMES FERRY, ABOUT 0.3 MILE SOUTH OF MILE POST 228, SET IN THE TOP OF THE WEST END OF THE NORTH ABUTMENT OF A 175-FOOT BRIDGE OVER TOBLER CREEK, 7 FEET WEST OF WEST RAIL, 2 FEET EAST OF WEST END OF THE ABUTMENT AND ABOUT 1 FOOT BELOW LEVEL OF TRACK.

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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