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Details for Benchmark: AE2000

N 44° 53.917 W 097° 05.850 (NAD 83)

Altitude: 1734.05

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

Location:
In CODINGTON county, SD View Original Datasheet
Designation:
C 467
Marker Type:
metal rod
Setting:
stainless steel rod in sleve
Stability:
Probably hold position/elevation well.

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Documented History (by the NGS)

01/01/1995 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1995 (GAS) IN WATERTOWN, AT THE INTERSECTION OF THE DAKOTA MINNESOTA EASTERN RAILROAD AND 11TH STREET, 21.3 M (69.9 FT) SOUTHWEST OF THE NEAR RAIL, 12.3 M (40.4 FT) WEST OF THE SOUTH END OF A SIGN (DAKOTA CEMENT PLANT), 10.7 M (35.1 FT) EAST OF AND LEVEL WITH THE STREET CENTER, AND 1.1 M (3.6 FT) NORTH OF A WITNESS POST. NOTE--ACCESS TO THE DATUM POINT IS THROUGH A 5-INCH LOGO CAP. THE SLEEVE DEPTH DOES NOT MEET THE SPECIFICATIONS FOR A CLASS A MARK.
09/19/1995 by NGS (GOOD)
10/11/1996 by CHANCE (GOOD)
RECOVERY NOTE BY JE CHANCE AND ASSOCIATES 1996 (LH) IN WATERTOWN, AT THE INTERSECTION OF THE DAKOTA MINNESOTA EASTERN RAILROAD AND 11TH STREET EAST, 21.3 M (69.9 FT) SOUTHWEST OF THE NEAR RAIL, 12.3 M (40.4 FT) WEST OF THE SOUTH END OF A SIGN (DAKOTA CEMENT PLANT), 10.7 M (35.1 FT) EAST OF AND LEVEL WITH THE STREET CENTER, AND 1.1 M (3.6 FT) NORTH OF A WITNESS POST. NOTE--ACCESS TO THE DATUM POINT IS THROUGH A 5-INCH LOGO CAP. THE SLEEVE DEPTH DOES NOT MEET THE SPECIFICATIONS FOR A CLASS A MARK.

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 July 1998.
  • 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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