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Details for Benchmark: QA0764

N 44° 37.383 W 114° 41.186 (NAD 83)

Altitude: 8981

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

Location:
In CUSTER county, ID View Original Datasheet
Designation:
MID COTTONWOOD LOH
Marker Type:
lookout house
Setting:
setting not listed - see description
Stability:

Reference Points

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Documented History (by the NGS)

01/01/1961 by USGS (FIRST OBSERVED)
DESCRIBED BY US GEOLOGICAL SURVEY 1961 STATION LOCATED ABOUT 24.0 MI. NW. OF CHALLIS, IDAHO, 3.6 MI. SE. OF THE CONFLUENCE OF WARM SPRINGS CREEK AND LOON CREEK, LOCATED ON A LONG RIDGE BETWEEN FIR CREEK AND COTTONWOOD CREEK. THE CENTER OF MID COTTONWOOD LOOKOUT HOUSE IS LOCATED ON RIDGE. REACHED BY HELICOPTER. SIGNAL--LOOKOUT HOUSE.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)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.