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Details for Benchmark: SU1117

N 47° 41.273 W 115° 09.597 (NAD 83)

Altitude: 7009

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

Location:
In SANDERS county, MT View Original Datasheet
Designation:
PRIS ET
Marker Type:
triangulation station disk
Setting:
in rock outcrop
Stability:
Most reliable and expected to hold position/elevation well.

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Documented History (by the NGS)

01/01/1964 by USGS (MONUMENTED)
DESCRIBED BY US GEOLOGICAL SURVEY 1964 STATION LOCATED 6.5 MI. N. AND 8.5 MI. E. OF THOMPSON FALLS, AT THE PRISCILLA PEAK LOOKOUT HOUSE, 3 FT. S. AND 4 FT. E. OF THE NE. CORNER OF HOUSE. STATION MARK - - STANDARD TABLET, STAMPED--- PRIS ET 1964 ---, SET IN BEDROCK. THERE IS A HELIPORT AT THE LOOKOUT.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in July 1992.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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