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Details for Benchmark: SU0950

N 47° 46.413 W 114° 16.126 (NAD 83)

Altitude: 5154

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

Location:
In LAKE county, MT View Original Datasheet
Designation:
JETTE
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Reference Points

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This is my first benchmark! I love history and this feels like history. lol Very cool. would love to find more of these!

[Photos:]
photoIMG_0025[1]

Found this benchmark after locating the Geo Cache "Wow what a view!"

[Photos:]
photoJette benchmark
photoJette benchmark

Documented History (by the NGS)

01/01/1939 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1939 (ANS) STATION IS ABOUT 7.5 MILES NW OF POLSON, 1.5 MILES SE OF BIG ARM, AIR LINE DISTANCES, ON CENTER AND HIGHEST OF THREE PARTIALLY WOODED HILLS, ON SAME HILL AND NEAR BIG ARM LOOKOUT. STATION MARK IS 21.47 METERS SSE OF CENTER OF LOOKOUT TOWER, AND HIGHEST POINT OF HILL, STAMPED JETTE 1939, PROJECTS 10 INCHES. SURFACE, UNDERGROUND AND REFERENCE MARK NO. 2 ARE STANDARD BRONZE DISKS SET IN CONCRETE, AS DESCRIBED IN NOTES 1A, 7A AND 11A. REFERENCE MARK NO. 1 IS A STANDARD BRONZE DISK SET IN ROCK OUTCROP WHICH IS ABOUT 15 FEET LONG, AND RUNS N-S, W OF AND ON A PROLONGATION OF THE LINE OF THE TWO SE SUPPORTS OF THE LOOKOUT TOWER, SLIGHTLY HIGHER THAN STATION, STAMPED JETTE R.M. NO. 1, 1939. OUTCROP PROJECTS 18 INCHES. REFERENCE MARK NO. 2 IS IN SE CORNER OF CONCRETE FOUNDATION BLOCK FOR SW CORNER SUPPORT OF LOOKOUT TOWER, LEVEL WITH STATION, PROJECTS 10 INCHES STAMPED JETTE NO. 2, 1939. STATION ARM IS DESIGNATED AS THE AZIMUTH. BAROMETRIC ELEVATION OF STATION, 4000 FEET, BAROMETER NO. 1.
01/01/1940 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1940 (ANS) RECOVERED AS DESCRIBED. ALL MARKS IN GOOD CONDITION. STATION MARK IS 70.2 FEET S OF THE CENTER OF THE BIG ARM LOOKOUT TOWER, ON HIGHEST PART OF HILL. REFERENCE MARK NO. 1 IS ABOUT 2.0 FEET HIGHER THAN THE STATION, AND 19.5 FEET W OF A 10-INCH FIR TREE. REFERENCE MARK NO. 2 IS ABOUT 2.0 FEET HIGHER THAN THE STATION, AND 15.5 FEET SW OF THE CENTER OF LOOKOUT TOWER. STATION IS REACHED AS FOLLOWS--FROM POLSON AT THE E END OF BRIDGE OVER THE FLATHEAD RIVER GO W AND N ON U.S. HIGHWAY 93. 6.8 MILES TO A DIRT ROAD ON THE LEFT. TURN LEFT ON DIRT ROAD AND GO UPHILL 0.15 MILE TO A FORK. TAKE LEFT FORK AND GO 4.25 MILES TO TOP OF HILL AND STATION. DIRECTIONS AND DISTANCES, 1940 MEASUREMENTS, WERE CHECKED AND ARE CORRECT.
01/01/1956 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1956 (VRS) THE STATION MARK AND BOTH REFERENCE MARKS WERE RECOVERED IN GOOD CONDITION AS DESCRIBED. JETTE LAKE LOOKOUT TOWER, DESCRIBED AS BIG ARM LOOKOUT TOWER, WAS ALSO RECOVERED.
01/01/1961 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (GMP) STATION AND MARKS WERE FOUND AS DESCRIBED. A NEW TO REACH FOLLOWS. TO REACH THE STATION FROM THE EAST END OF THE BRIDGE OVER THE FLATHEAD RIVER WEST OF POLSON, GO WEST ON U.S. HIGHWAY NO. 93 FOR 6.8 MILES TO A SIDE ROAD LEFT. TURN LEFT AND GO NORTHWEST ON A TRACK ROAD 0.1 MILE TO A GATE. PASS THROUGH THE GATE AND CONTINUE NORTHWEST ON THE TRACK ROAD FOR 0.15 MILES TO A POINT WHERE THREE ROADS INTERSECT. TAKE THE CENTER AND MAIN ROAD NORTHWEST FOR 4.25 MILES TO THE TOP OF THE MOUNTAIN AND THE STATION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in July 1992.
  • The orthometric height was scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.