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Details for Benchmark: RA1306

N 45° 11.365 W 116° 24.767 (NAD 83)

Altitude: 8051

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

Location:
In ADAMS county, ID View Original Datasheet
Designation:
POLLOCK
Marker Type:
triangulation station disk
Setting:
in a boulder
Stability:
May hold, but of type commonly subject to surface motion.

Reference Points

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Documented History (by the NGS)

01/01/1946 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1946 (JTJ) STATION IS LOCATED ABOUT 16 MILES NNW OF NEW MEADOWS, 9 MILES SSW OF POLLOCK POST OFFICE, ON THE SUMMIT OF POLLOCK MOUNTAIN, NEAR THE POLLOCK MOUNTAIN LOOKOUT HOUSE, AND ABOUT 14 MILES SSW OF RIGGINS. IT IS IN THE MIDDLE OF A NARROW ROCKY RIDGE, 64.7 FEET N OF THE LOOKOUT HOUSE, AND 14.8 FEET W OF THE TRAIL LEADING TO THE LOOKOUT HOUSE. STATION MARK IS A BRONZE STATION DISK SET IN A DRILL HOLE IN A BOULDER. THE DISK IS STAMPED POLLOCK 1946 AND PROJECTS ABOUT 8 INCHES ABOVE THE GROUND. NO UNDERGROUND MARK WAS SET. REFERENCE MARK 1, STAMPED POLLOCK NO 1 1946, IS A BRONZE REFERENCE DISK SET IN A DRILL HOLE IN A BOULDER. IT IS AT STATION ELEVATION AND IS LOCATED IN THE CENTER OF THE NARROW RIDGE. REFERENCE MARK 2, STAMPED POLLOCK NO 2 1946, IS A BRONZE REFERENCE DISK SET IN A DRILL HOLE IN A BOULDER. IT PROJECTS APPROXIMATELY 5 INCHES AND IS LOCATED 2 FEET BELOW STATION ELEVATION. AZIMUTH MARK IS ABOUT 0.5 MILE SW OF STATION AND IS 1.5 FEET S OF THE TRAIL THAT GOES TO THE LOOKOUT HOUSE WHERE THE TRAIL PASSES A SMALL KNOLL THAT IS BELOW THE LOOKOUT HOUSE. THE MARK IS N OF THE E END OF THE SMALL KNOLL. IT IS A BRONZE AZIMUTH DISK SET IN A DRILL HOLE IN A BOULDER AND PROJECTS 2 FEET ON THE N AND 1.5 FEET ON THE S. DISK IS STAMPED POLLOCK 1946. NO WITNESS MARK WAS SET. TO REACH THE STATION FROM THE POST OFFICE IN NEW MEADOWS, GO N ONE BLOCK TO U.S. HIGHWAY 95, TURN RIGHT AND GO ON HIGHWAY 95 FOR 11.70 MILES TO A STEEL BRIDGE OVER LITTLE SALMON RIVER. IMMEDIATELY AFTER CROSSING BRIDGE, TURN SHARP LEFT AND GO ON DIRT ROAD FOR 2.1 MILES TO A FORK IN THE ROAD, TAKE THE RIGHT FORK FOR 0.4 MILE TO ANOTHER FORK, KEEP TO THE RIGHT FORK AND GO 4 MILES TO THE ENTRANCE TO SMOKEY CAMP GROUNDS. CONTINUE ON ROAD FOR 0.25 MILE TO END OF TRUCK TRAVEL AND ALSO END OF ROAD. PASS THROUGH THE WIRE GATE AND TAKE THE TRAIL NW AS PER SIGN POLLOCK MT. 5 AND GO ABOUT 4 MILES TO CROSS TRAILS IN THE SADDLE AT THE TOP OF THE DIVIDE, KEEP RIGHT AS PER SIGN POLLOCK MT. L.O. AND GO NE ON TRAIL FOR ABOUT 1 MILE TO LOOKOUT HOUSE AND STATION. WATER IS TO BE HAD SHORTLY BEFORE REACHING THE DIVIDE.
01/01/1962 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1962 NOTE BY USGS, 1962--ALL MARKS FOUND AS DESCRIBED IN GOOD CONDITION. RECOVERED BY NGS IN 1966. DESCRIPTION AND POSITION LISTED IN NGS QUAD 45116-2, STATION 1026. STATION MARK--A BRONZE STATION DISK SET IN A DRILL HOLE IN A BOULDER. THE DISK IS STAMPED---POLLOCK 1946---, AND PROJECTS ABOUT 8 IN. ABOVE THE GROUND.
01/01/1966 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1966 (CAA) THE STATION MARK REFERENCE MARKS 1 AND 2 AND THE AZIMUTH MARK WERE RECOVERED AS DESCRIBED AND ARE IN GOOD CONDITION. THE STATION WAS VISITED BY HELICOPTER AT THIS TIME. THE 1946 ROUTE TO THE STATION IS BELIEVED ADEQUATE. NOTE--THE LINE TO RUBICON IS OBSTRUCTED BY THE POLLOCK MTN LOOKOUT HOUSE. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--16 MILES NORTH-NORTHWEST OF NEW MEADOWS. HEIGHT OF LIGHT ABOVE STATION MARK 4 FEET.

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.