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Details for Benchmark: BS1685

N 31° 59.323 W 083° 46.482 (NAD 83)

Altitude: 298.5

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

Location:
In CRISP county, GA View Original Datasheet
Designation:
CRISP
Marker Type:
triangulation station disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

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Documented History (by the NGS)

01/01/1985 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1985 (AJL) THE STATION IS LOCATED ABOUT 2.1 KM (1.3 MI) NORTH-NORTHEAST OF DPWMTPWM CORDELE, 2.5 KM (1.5 MI) NORTHWEST OF THE JUNCTION OF INTERSTATE HIGHWAY 75 AND STATE HIGHWAY 257, AT THE CRISP COUNTY-CORDELE AIRPORT, JUST WEST OF THE MAIN RAMP, AT THE WINDSOCK. OWNERSHIP--CRISP COUNTY, C/O AIRPORT MANAGER STEVE REYNOLDS, COUNTY COURTHOUSE, CORDELE GA 31015. PHONE (912) 273-3124. TO REACH THE STATION FROM THE JUNCTION OF HIGHWAYS 75 AND 257 (EXIT 34), 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 STRAIGHT AHEAD AND GO WEST FOR 0.2 KM (0.1 MI) ON ROAD TO A CROSS STREET. TURN RIGHT AND GO NORTH FOR 1.5 KM (0.95 MI) ON NORTH SECOND STREET TO ROAD END AT GATE. PASS THROUGH GATE, THEN BEAR LEFT AND GO NORTH ON TARMAC THEN RAMP FOR 0.4 KM (0.25 MI) TO THE SOCK AND STATION ON THE LEFT. THE STATION IS A STANDARD NGS DISK STAMPED---CRISP 1985---, SET INTO THE TOP OF A ROUND CONCRETE MONUMENT 25 CM IN DIAMETER FLUSH WITH GROUND. LOCATED 100.0 METERS (328.1 FT) WEST FROM THE RAMP CENTER, 7.8 METERS (25.6 FT) SOUTH-SOUTHEAST FROM THE WINDSOCK, 1.5 METERS (4.9 FT) EAST-SOUTHEAST FROM A METAL WITNESS POST, 0.9 METERS (3.0 FT) NORTHEAST FROM A FIBERGLASS WITNESS POST, INSIDE THE SYMMETRICAL CIRCLE. THE UNDERGROUND MARK IS A STANDARD NGS DISK STAMPED---CRISP 1985---, SET INTO AN IRREGULAR MASS OF CONCRETE 1 METERS BELOW THE SURFACE. DESCRIBED BY G.R. HEID, TYPED BY R.L. ZURFLUH.
04/25/1998 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1998 (AJL) RECOVERED AS DESCRIBED WITH THE FOLLOWING CHANGES. AIRPORT MANAGER IS DUB COOPER, 1701 2ND STREET NORTH. THERE IS NO FIBERGLASS WITNESS POST. THIS STATION HAS BEEN DESIGNATED AS THE PRIMARY AIRPORT CONTROL STATION (PACS) .
04/25/1998 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1998 (AJL) RECOVERED AS DESCRIBED WITH THE FOLLOWING CHANGES. AIRPORT MANAGER IS DUB COOPER, 1701 2ND STREET NORTH. THERE IS NO FIBERGLASS WITNESS POST. THIS STATION HAS BEEN DESIGNATED AS THE PRIMARY AIRPORT CONTROL STATION (PACS) .

Control Text

  • This mark is at Crisp Co-Cordele Airport (CKF)
  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in September 1999.
  • The orthometric height was determined by GPS observations and a high-resolution geoid model.
  • GPS derived orthometric heights for airport stations designated as PACS or SACS are published to 2 decimal places. This maintains centimeter relative accuracy between the PACS and SACS. It does not indicate centimeter accuracy relative to other marks which are part of the NAVD 88 network.
  • 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.

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