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Details for Benchmark: TN0829

N 48° 21.978 W 114° 29.254 (NAD 83)

Altitude: 4288

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

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

Reference Points

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Documented History (by the NGS)

01/01/1960 by USGS (MONUMENTED)
DESCRIBED BY US GEOLOGICAL SURVEY 1960 ABOUT 13.5 MI. (AIRLINE) NW. OF KALISPELL, MONTANA, AND 7.5 MI. (AIRLINE) SW. OF WHITEFISH, MONTANA, ON THE SOUTHEASTERN END OF A PROMINENT TOP. IT IS 80 FT. SE. AND 2.7 FT. LOWER THAN THE HIGH POINT. TO REACH FROM THE JUNCTION OF U.S. HIGHWAYS 2 AND 93 IN KALISPELL, MONTANA, GO 0.8 MI. W. ON HIGHWAY 2 TO THE JUNCTION OF STATE SECONDARY 424 AND FOLLOW 424 N. AND W. FOR 10.9 MI. TO END OF PAVEMENT. CONTINUE N. ON GRAVEL RD. 2.1 MI. TO TALLEY LAKE RD. TAKE TALLEY LAKE RD. N. AND W. FOR 5.4 MI. TO A PASS. TAKE TRACK RD. RIGHT (N.) 0.4 MI. TO STEEP Y-RD. GO RIGHT FOR 0.4 MI. LEAVE TRUCK AND WALK NE. TO HIGHEST TOP ON RIDGE AND STATION SITE, ABOUT 30 MINUTE CLIMB. STATION MARK--STANDARD TABLET CEMENTED IN ROCK OUTCROP AND STAMPED ---TALLEY ET---. REFERENCE MARKS--NONE.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)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