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Details for Benchmark: OQ0772

N 43° 37.633 W 096° 30.892 (NAD 83)

Altitude: 1558.6

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

Location:
In MINNEHAHA county, SD View Original Datasheet
Designation:
CORSON
Marker Type:
triangulation station disk
Setting:
set into the top of a round concrete monument
Stability:

Reference Points

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Documented History (by the NGS)

01/01/1927 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1927 (HWH) ABOUT 3 MILES EAST AND 3/4 MILE NORTH OF THE TOWN OF CORSON, IN THE NORTHEAST QUARTER SEC. 19, T. 102 N., R. 47 W., ON THE FARM OF MR. J.C. ANDERSON. THE MARK IS ON THE HIGHEST POINT OF THE RIDGE SOUTHWEST OF THE ANDERSON FARMHOUSE, 229.5 METERS WEST OF THE SECTION-LINE ROAD RUNNING NORTH AND SOUTH, 370.6 METERS SOUTH OF A ROAD RUNNING EAST AND WEST, AND SET ABOUT 5 METERS EAST OF A FENCE LINE RUNNING NORTH AND SOUTH. REFERENCE MARK NO. 1 IS SET JUST OUTSIDE THE FENCE CORNER AT THE SOUTHEAST CORNER OF TRUCK PATCH AT THE FARMHOUSE, AND IS 5.5 METERS WEST OF THE CENTERLINE OF THE NORTH-SOUTH ROAD. REFERENCE MARK NO. 2 IS AT THE FENCE CORNER NORTHWEST OF THE STATION, AND 7.9 METERS SOUTH OF THE CENTERLINE OF THE ROAD RUNNING EAST AND WEST, NORTH OF THE STATION. HEIGHT OF SIGNAL ABOVE STATION MARK - 27 METERS.
01/01/1934 by SDGS (GOOD)
RECOVERY NOTE BY SOUTH DAKOTA GEODETIC SURVEY 1934 ORIGINAL DESCRIPTION O.K. NOTE--REFERENCE MARK NO. 1 NEED REPAIRING. WATER HAS WASHED THE SOIL FROM AROUND IT. PARTY BELIEVES THAT IT MAY HAVE TO BE RESET. PARTY NO. 5 PLANNED TO REPAIR IT, BUT THIS WORK WAS TERMINATED BEFORE HAVING THE OPPORTUNITY.
01/01/1935 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1935 (CIA) STATION IS ABOUT 3 MILES EAST AND 3/4 MILE NORTH OF THE TOWN OF CORSON, IN THE NORTHEAST QUARTER SEC. 19, T. 102 N., R. 47 W., ON THE FARM OF MRS. J.C. ANDERSON. THE MARK IS ON THE HIGHEST POINT OF THE RIDGE SOUTHWEST OF THE ANDERSON FARMHOUSE. IT IS 229.5 METERS WEST OF THE SECTION-LINE ROAD RUNNING NORTH AND SOUTH, 370.6 METERS SOUTH OF THE SECTION-LINE ROAD RUNNING EAST AND WEST. STATION MARK AND REFERENCE MARK NO. 2 WERE RECOVERED IN GOOD CONDITION. REFERENCE MARK NO. 1 WAS DESTROYED. TWO NEW MARKS WERE SET. REACHED FROM CORSON BY GOING EAST ON SECTION-LINE ROAD 3.0 MILES, TURN LEFT (NORTH) ON DIRT ROAD AND GO 0.9 MILE, TURN LEFT (WEST) INTO MRS. ANDERSONS FARMYARD. FROM BARNYARD, GO SOUTH ALONG WEST SIDE OF ALFALFA FIELD (1935) FOR 0.1 MILE, TO JUST SOUTH OF CONCRETE WATER RESERVOIR, TURN RIGHT (WEST) AND GO ACROSS FIELD 0.1 MILE TO STATION. REFERENCE MARK NO. 2 (1927) IS AT THE FENCE CORNER NORTHWEST OF STATION , 30 FEET SOUTH OF CENTERLINE OF EAST-AND-WEST ROAD. REFERENCE MARK NO. 3 (1935) IS NORTHEAST OF STATION AT FENCE CORNER, 33 FEET WEST OF CENTERLINE OF NORTH-SOUTH ROAD. REFERENCE MARK NO. 4 (1935) IS EAST OF STATION AT WEST EDGE OF CONCRETE RESERVOIR.
01/01/1949 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1949 (MEW) STATION WAS RECOVERED AS DESCRIBED AND FOUND TO BE IN GOOD CONDITION. THE DISTANCE AND DIRECTION TO REFERENCE MARKS NO. 3 AND 4 CHECKED. AN AZIMUTH MARK WAS ESTABLISHED WHICH IS 32 FEET SOUTH OF THE APPROXIMATE CENTERLINE OF GRAVEL ROAD, 2 FEET WEST OF WITNESS POST AND 0.5 FOOT SOUTH OF FENCE. THE MARK PROJECTS ABOUT 5 INCHES AND THE DISK IS STAMPED CORSON 1949. TO REACH FROM THE DRIVEWAY LEADING TO THE ANDERSON FARM GO NORTH ON GRAVEL ROAD FOR 0.05 MILE TO CROSSROADS. TURN RIGHT AND GO EAST FOR 0.1 MILE TO AZIMUTH ON RIGHT AS DESCRIBED. HEIGHT OF LIGHT ABOVE STATION MARK - 14 METERS.
01/01/1961 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (EWG) STATION, REFERENCE MARK NO. 3, REFERENCE MARK NO. 4, AND AZIMUTH MARKS WERE RECOVERED AS DESCRIBED IN GOOD CONDITION. DESCRIPTION IS ADEQUATE AND COMPLETE. NEW TO REACH FOLLOWS. TO REACH FROM POST OFFICE IN CORSON, SOUTH DAKOTA, GO EAST ON GRAVEL ROAD FOR 3.0 MILES TO CROSSROAD, TURN LEFT, NORTH, AND GO 0.85 MILE TO A FIELD ENTRANCE ON LEFT AND REFERENCE MARK NO. 3 AND ABOUT 15 PACES NORTH OF THIS ENTRANCE. TURN LEFT, NORTH, FOR 0.05 MILE TO A GATE ON FENCE CORNER TURN LEFT PASSING THROUGH GATE AND GO SOUTH ACROSS FIELD FOR 0.5 MILE TO REFERENCE MARK NO. 4 AT THE WEST END OF THE CONCRETE RESERVOIR AND STATION 419 FT WEST. LINE FROM STATION TO REFERENCE MARK NO. 3 AND AZIMUTH MARK IS NOW BLOCKED BY CORN BINS WHICH HAVE BEEN BUILT ON LINE.
01/01/1966 by CGS (MARK NOT FOUND)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1966 (EBB) THE STATION MARK WAS NOT RECOVERED AS IT WAS IN A CORN FIELD AND IT WAS NOT POSSIBLE TO MEASURE FROM THE REFERENCE MARKS. THE STATION MAY STILL BE IN PLACE. R.M. NO. 3, R.M. NO. 4 AND THE AZIMUTH MARK RECOVERED AND FOUND IN GOOD CONDITION. TO REACH THE STATION FROM CORSON, FROM THE MAIN INTERSECTION, GO EAST ON GRAVEL ROAD FOR 3.0 MILES TO CROSSROADS, TURN LEFT AND GO NORTH FOR 0.85 MILE TO A FARM ENTRANCE AND R.M. NO. 3 ON THE LEFT. THE REFERENCE MARK IS ABOUT 50 FEET NORTH OF THE FARM ENTRANCE AND THE STATION IS IN THE FIELD ABOUT 0.15 MILE TO THE SOUTHWEST. THE AZIMUTH MARK IS 0.2 MILE EAST OF THE CROSSROADS TO NORTHEAST OF THE STATION. A METAL WITNESS POST WAS SET 1 FOOT NORTH OF THIS MARK.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1998.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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