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Details for Benchmark: PU1908

N 44° 54.983 W 103° 38.967 (NAD 83)

Altitude: 3151.62

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

Location:
In BUTTE county, SD View Original Datasheet
Designation:
BOBER
Marker Type:
triangulation station 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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FOUND IT WITH CHARLIE AND THE KIDS.
ON OUR 6000 MILES TRIP ACROSS THE USA.
TIGGR

We were along with grandpa GEO*TRAILBLAZER 1 and TIGGR our grandma when we recovered the mark.

We were lucky enough to be with our Grandpa,GEO*TRAILBLAZER 1 and our Grandma TIGGR when they recovered this mark.

FOUND THIS ONE WHILE IN THE AREA GETTING THE CENTER OF THE NATION GEOCACHE.

MARK IS IN GOOD SHAPE.
REFERENCE MARK 1 WAS NOT FOUND.
AZIMUTH MARK NOT SEARCHED FOR THIS DATE.
ANOTHER IN OUR 6000 MILE TREK FOLLOWING THE LEWIS AND CLARK EXPEDITION.

[Photos:]
photoPU1908 BOBER TRI STA
BOBER TRIANGULATION STATION
photoPU1908 BOBER TRI STA VIEW
BOBER,PRARIE GRASS AND SKY.

Documented History (by the NGS)

01/01/1962 by CGS (MONUMENTED)
01/01/1963 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1963 22.7 MI NW FROM NISLAND. ABOUT 0.2 MILE EAST ALONG THE CHICAGO AND NORTH WESTERN RAILWAY FROM THE STATION AT NISLAND, THENCE 1.15 MILES NORTH ALONG A GRADED COUNTY ROAD, THENCE 0.3 MILE EAST ALONG A GRADED COUNTY ROAD, THENCE 2.0 MILES NORTH ALONG A TRACK ROAD, THENCE 1.25 MILES NORTH ALONG A GRADED COUNTY ROAD, THENCE 3.0 MILES WEST ALONG A GRAVELED COUNTY ROAD, THENCE 2.0 MILES NORTH ALONG A GRAVELED COUNTY ROAD, THENCE 2.0 MILES WEST ALONG A GRAVELED COUNTY ROAD, THENCE 10.8 MILES NORTH ALONG A GRAVELED COUNTY ROAD, 0.05 MILE NORTH OF A CATTLE GUARD, 39.5 FEET EAST OF THE CENTERLINE OF THE ROAD, 69.4 FEET EAST ACROSS THE ROAD FROM R.M. 1, 2.0 FEET EAST OF A NORTH-SOUTH FENCE, 56.4 FEET SOUTH OF R.M. 2, 8.0 FEET SOUTH OF A METAL WITNESS POST, ABOUT LEVEL WITH THE ROAD, AND SET IN THE TOP OF A CONCRETE POST LEVEL WITH THE GROUND.

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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