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Details for Benchmark: OQ0049

N 43° 36.533 W 096° 27.417 (NAD 83)

Altitude: 1449.3

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

Location:
In MINNEHAHA county, SD View Original Datasheet
Designation:
END 2 RM 4
Marker Type:
reference 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)

01/01/1971 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1971 2 MI N FROM VALLEY SPRINGS. ABOUT 6 MILES EAST OF CORSON, SOUTH DAKOTA, 0.2 MILE WEST OF THE MINNESOTA-SOUTH DAKOTA STATE LINE, AT THE EAST EDGE OF A REST STOP AREA ALONG THE NORTH SIDE OF INTERSTATE HIGHWAY 90, 334 FEET NORTH OF THE CENTER OF THE WEST BOUND LANES OF HIGHWAY 90, 51 FEET WEST OF A NORTH-SOUTH FENCE, SET IN A ROUND CONCRETE MONUMENT FLUSH WITH THE GROUND.
05/26/1991 by NGS (MARK NOT FOUND)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1991 MARK NOT FOUND.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was computed from unverified reset data.
  • The geoid height was determined by GEOID99.

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