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Details for Benchmark: BS0989

N 31° 58.202 W 083° 46.863 (NAD 83)

Altitude: 318.28

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

Location:
In CRISP county, GA View Original Datasheet
Designation:
C 79
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)
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 AT CORDELE. AT CORDELE, CRISP COUNTY, 26 FEET WEST OF THE NORTHWEST CORNER OF THE ATLANTIC COAST LINE RAILROAD FREIGHT STATION, 73 FEET SOUTH OF THE SOUTH RAIL OF THE MAIN TRACK, 25.5 FEET EAST OF THE CENTERLINE OF A STREET, AND AT THE EAST EDGE OF THE SIDEWALK. A STANDARD DISK, STAMPED C 79 1934 AND SET IN THE TOP OF A CONCRETE POST.
01/01/1972 by NGS (MARK NOT FOUND)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1972 MARK NOT FOUND.
01/01/1987 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1987 (AJL) THE STATION WAS RECOVERED AT THIS DATE. THE STAION IS LOCATED IN NORTH CENTRAL CORDELE, AT THE JUNCTION OF SIXTH STREET AND THE SEABOARD COAST LINE RAILROAD, IN THE PARKING LOT AT THE SEABOARD FREIGHT STATION WOODEN BUILDING. OWNERSHIP--CITY OF CORDELE. TO REACH THE STATION FROM THE JUNCTION OF INTERSTATE HIGHWAY 75 AND STATE HIGHWAY 257 (EXIT 34) JUST NORTHEAST OF CORDELE, GO WEST FOR 1.9 KM (1.15 MI) ON PAVED ROAD (BECOMES E. EIGHTH AVENUE) TO THE NATIONAL GUARD ARMORY ON THE LEFT. CONTINUE WEST FOR 0.8 KM (0.5 MI) TO A CROSS STREET. TURN LEFT AND GO SOUTH FOR 0.2 KM (0.1 MI) ON SIXTH STREET TO THE STATION ON THE LEFT, ON THE SOUTH SIDE OF RAILROAD TRACKS. THE STATION IS A STANDARD CGS DISK STAMPED---C 79 1934---, SET INTO THE TOP OF A SQUARE CONCRETE MONUMENT 15 CM ON SIDE PROJECTING 2 CM ABOVE GROUND. LOCATED 10.9 METERS (35.8 FT) SOUTH FROM THE SOUTH RAIL OF SIDE TRACK, 6.6 METERS (21.7 FT) SOUTH FROM THE WEST ONE OF TWO UTILITY POLES, 2.1 METERS (6.9 FT) EAST FROM THE EAST CURB OF SIXTH STREET, 0.2 METERS (0.7 FT) EAST FROM THE EAST EDGE OF SIDEWALK, 12.4 METERS (40.7 FT) WEST FROM THE NORTHWEST CORNER OF STATION, AND 0.9 METERS (3.0 FT) NORTH FROM THE EXTENDED NORTH WALL OF STATION. DESCRIBED BY G.R. HEID, TYPED BY R.L. ZURFLUH.
03/06/1994 by GAPC (GOOD)
RECOVERY NOTE BY GEORGIA POWER COMPANY 1994 (CFS) THE STATION IS LOCATED IN NORTH CENTRAL CORDELE, AT THE JUNCTION OF SIXTH STREET AND THE SEABOARD COAST LINE RAILROAD, IN THE PARKING LOT AT THE SEABOARD FREIGHT STATION WOODEN BUILDING. OWNERSHIP--CITY OF CORDELE. NOTE--CONDITION--THE BENCHMARK MAY HAVE BEEN DISTURBED DURING CONSTRUCTION OF LARGE UNDERGROUND TELECOMMUNICATIONS VAULTAND/OR DURING INSTALLATION OF ASPHALT PARKING SURFACE. MONUMENT APPEARS TO BE ON TOP OF VAULT BELOW. MONUMENT HAS SEVERAL CUTS IN ITS BRASS DISK. MONUMENT APPEARS TO BE VERY STABLE AT THIS TIME, BUT IS NOT IN AN IDEAL LOCATION FOR LONGIVITY. NOTE--MAGNETIC--PROBABLE STEEL REINFORCING RODS IN CONNECTING SIDEWALK AND TELECOMMUNICATIONS VAULT BELOW MONUMENT. TO REACH THE STATION FROM THE JUNCTION OF INTERSTATE HIGHWAY 75 AND STATE HIGHWAY 257 (EXIT 34) JUST NORTHEAST OF CORDELE, GO WEST FOR 1.9 KM (1.20 MI) ON PAVED ROAD (BECOMES E. EIGHTH AVENUE) TO THE NATIONAL GUARD ARMORY ON THE LEFT, CONTINUE WEST FOR 0.8 KM (0.50 MI) TO SIXTH STREET, TURN LEFT AND GO SOUTH FOR 0.2 KM (0.10 MI) ON SIXTH STREET TO THE STATION ON THE LEFT, ON THE SOUTH SIDE OF RAILROAD TRACKS. THE STATION PROJECTS 2 CM ABOVE GROUND. LOCATED 12.4 M (40.7 FT) WEST FROM THE NORTHWEST CORNER OF THE STATION, 10.9 M (35.8 FT) SOUTH FROM THE SOUTH RAIL ON SIDE TRACK, 6.6 M (21.7 FT) SOUTH FROM THE WEST ONE OF TWO UTILITY POLES, 2.1 M (6.9 FT) EAST FROM THE EAST CURB OF SIXTH STREET, 0.9 M (3.0 FT) NORTH FROM THE EXTENDED NORTH WALL OF THE STATION AND 0.2 M (0.7 FT) EAST FROM THE EAST EDGE OF THE SIDEWALK.
02/25/1995 by LOCENG (GOOD)
RECOVERY NOTE BY LOCAL ENGINEER (INDIVIDUAL OR FIRM) 1995 (WCM) RECOVERED AS DESCRIBED.
04/08/1998 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1998 (AJL) RECOVERED AS DESCRIBED.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in September 1999. No horizontal observational check was made to the station.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • 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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