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Details for Benchmark: CM0360

N 32° 28.650 W 084° 59.350 (NAD 83)

Altitude: 253.84

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

Location:
In MUSCOGEE county, GA View Original Datasheet
Designation:
Q 52
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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This is not destroyed. Recovered in good condition per the 1973 description with the following comments:

  • The 59.5, 19, and 15.5 foot dimensions were all verified to still be valid. The 10-inch pipe culvert under the foot path is now gone. The mark is now flush with the ground surface.

  • The mark is 12.6 feet east-northeast of a palm tree.

GPS (HH2) coordinates for the mark are: N 32° 28.644 W 084° 59.351

(FYI – There are a couple of “ghost signs” visible from this mark if you are interested – see comments in photo captions for the second and third photos.)

[Photos:]
photoCM0360 - Disk - Columbus, Georgia
photoCM0360 – Setting
photoCM0360 - Eye level view.
Arrow points to mark. The building on the right has a ghost sign that is logged on waymarking.com (code WM4ZM8). The sign is for “Julius Friedlaender Co. - Mfrs. Jute Bagging, Cotton Ties, Cotton Waste” and is at far end.
photoCM0360 - Looking northward.
Arrow points to the disk. Another ghost sign (for Burnham Van Service) can be seen on the building in the background.
photoCM0360- Mark, train, and palm tree.
It is always great when a train comes by during photo time.
photoCM0360 – Looking east.
The mark is in the yellow square. To the left and slightly behind the mark you can see a broken section of what was probably the 10-inch pipe culvert that used to run under the foot path.
photoCM0360 – Looking west - wide.
The arrow points to the location of the mark.

This benchmark was apparently destroyed either during or before the building of the overpass on 2nd.

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
01/01/1973 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1973 1.4 MI NW FROM COLUMBUS. ABOUT 0.5 MILE WEST ALONG 12TH STREET FROM THE UNION STATION AND THE INTERSECTION OF 12TH STREET AND 6TH AVENUE AT COLUMBUS, THENCE 0.25 MILE NORTH ALONG BROADWAY, THENCE 0.25 MILE EAST ALONG 14TH STREET, THENCE 0.35 MILE NORTH ALONG 3RD AVENUE, AT THE JUNCTION OF 3RD AVENUE AND RAILROAD STREET, AND THE CROSSING OF 3RD AVENUE AND THE CENTRAL OF GEORGIA RAILWAY, IN A VERY SMALL PARK BETWEEN THE TRACK AND RAILROAD STREET, 15 1/2 FEET SOUTH OF THE SOUTH RAIL OF THE MAIN TRACK, 59 1/2 FEET WEST OF THE WEST CURB OF 3RD AVENUE, 19 FEET NORTH OF THE NORTH CURB OF RAILROAD STREET, 11 1/2 FEET SOUTH-SOUTHWEST OF THE WEST END OF A 10-INCH PIPE CULVERT UNDER A FOOT PATH, ABOUT LEVEL WITH THE TRACK, AND SET IN THE TOP OF A CONCRETE POST 2 INCHES UNDERGROUND.

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. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
  • 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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