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Details for Benchmark: CM0355

N 32° 28.117 W 084° 59.050 (NAD 83)

Altitude: 254.02

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

Location:
In MUSCOGEE county, GA View Original Datasheet
Designation:
COLUMBUS FF
Marker Type:
triangulation station disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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The concrete platform, the benchmark disk, the brick pillars and the platform roof have all been demolished. The Union Station building is still there and is being used by the Chamber of Commerce.

Thanks, Fort Rectus

Concrete platform is gone.

Documented History (by the NGS)

Unknown by CGS (MONUMENTED)
01/01/1973 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1973 AT COLUMBUS. AT COLUMBUS, AT THE UNION STATION WHICH IS LOCATED AT THE INTERSECTION OF 6TH AVENUE AND 12TH STREET, SET IN THE TOP OF THE SOUTH END OF THE CONCRETE PLATFORM WHICH IS LOCATED ON THE EAST SIDE OF THE STATION, 187 FEET EAST OF THE CENTER LINE OF 6TH AVENUE, 52 FEET NORTH OF THE CENTER LINE OF 12TH STREET, 18 FEET EAST OF THE SOUTHEAST CORNER OF THE BUILDING, 5 1/2 FEET WEST OF THE WEST RAIL OF THE WEST TRACK, 5 FEET EAST OF THE SOUTHEAST CORNER OF A LARGE BRICK PILLAR THAT SUPPORTS A PORTION OF THE PLATFORM ROOF. NOTE-- THE CONCRETE IS WORN AWAY FROM THE SOUTH EDGE OF THE DISK. MOST OF THE ORIGINAL STAMPING IS WORN OFF OF THE DISK AND THE DISK IS SLIGHTLY BENT.

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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