Details for Benchmark: PY1255
N 44° 46.319 W 110° 32.877 (NAD 83)
Coordinates may not be exact. Altitude is VERTCON and location is ADJUSTED. (more info)
- In PARK county, WY View Original Datasheet
- Marker Type:
- survey disk
- in a boulder
- May hold, but of type commonly subject to surface motion.
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Documented History (by the NGS)
|01/01/1955 by USGS (MONUMENTED)
|DESCRIBED BY US GEOLOGICAL SURVEY 1955
STATION LOCATED ABOUT 16 MI. (AIRLINE) SE. OF MAMMOTH HOT SPRINGS, WYOMING, AND ABOUT 5 MI. NW. OF CANYON IN YELLOWSTONE PARK, ON THE NW. EDGE AND HIGHEST PART OF A MOUNTAIN KNOWN AS OBSERVATION PEAK, 46 FT. W. OF THE CENTER OF A LOOKOUT HOUSE.
TO REACH STATION FROM CANYON JUNCTION, GO NORTHERLY ON THE CANYON TOWER JUNCTION HIGHWAY 2.9 MI. TO TURNOUT ONTO DIRT RD. ON LEFT, THIS TURNOUT MAY BE HARD TO FIND AND IS LOCATED ABOUT 0.4 MI. NE. OF CURVE WHERE HIGHWAY CHANGES FROM N. TO AN EASTERLY COURSE. A SIGN WILL BE ENCOUNTERED ON DIRT RD. STATING THAT RD. IS A FIRE ROAD ONLY AND NOT OPEN TO THE PUBLIC, PROCEED WESTERLY 0.2 MI. TO LOCKED GATE, KEY FOR LOCK MUST BE OBTAINED FROM CANYON RANGER STATION. PROCEED WESTERLY ON DIM RD. 1.2 MI. FROM GATE TO END OF TRUCK TRAVEL. CONTINUE W. ALONG TRAIL IN MEADOW ABOUT 1 MI. TO CASCADE LAKE, ON THE N. SIDE OF LAKE A SIGN DESIGNATES THE MARKED TRAIL FOR THE ASCENT OF OBSERVATION PEAK. THE TRAIL IS WELL MARKED AND IS AN EASY 1-1/2-HOUR PACK FROM THE LAKE. PROCEED UP MOUNTAIN AND TO STATION AS DESCRIBED.
STATION MARK--STANDARD BRONZE TABLET, STAMPED ---OBSERVATION 1955---, SET IN VERY LARGE BOULDER 46 FT. W. OF CENTER OF LOOKOUT HOUSE.
- The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1997.
- The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)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.