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Details for Benchmark: TN0784

N 48° 32.510 W 114° 14.816 (NAD 83)

Altitude: 7198

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

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

Reference Points

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Documented History (by the NGS)

01/01/1939 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1939 (ANS) FIVE AND FIVE-TENTHS MILES WEST OF THE FLATHEAD RIVER, 5.0 MILES SOUTHWEST OF BIG CREEK RANGER STATION, 10.0 MILES NORTHWEST OF NORTH FORK RANGER STATION, ON THE SUMMIT OF STANDARD MOUNTAIN, 5.13 METERS EAST-NORTHEAST OF THE SOUTHEAST CORNER OF THE STANDARD LOOKOUT HOUSE. THE STATION IS A STANDARD DISK WELDED IN TOP OF A 2-1/2-INCH CAST IRON PIPE PROJECTING 1 FOOT, THE PIPE IS BURIED IN LOOSE ROCKS AND DIRT. THE DISK IS STAMPED STANDARD 1939. THE UNDERGROUND STATION MARK IS 36 INCHES UNDER THE SURFACE AND IS STAMPED STANDARD 1939. THE BAROMETRIC ELEVATION IS 7400 FEET. TO REACH FROM COLUMBIA FALLS, GO EAST FROM THE DEPOT ALONG THE SOUTH SIDE OF THE GREAT NORTHERN RAILROAD TRACKS ABOUT 1 MILE, THEN TURN LEFT (NORTH) ACROSS THE TRACKS AND FOLLOW THE MAIN TRAVELED ROAD, POSTED BIG CREEK RANGER STATION, MORAN RANGER STATION, AND GO 19.0 MILES. THE END OF TRUCK TRAVEL IS AT SIGN ON LEFT (WEST) SIDE OF THE ROAD READING TRAIL NO. 49 BIG CREEK, STANDARD MT. ETC. THE ROAD TO THE END OF TRUCK TRAVEL FOLLOWS ALONG THE WEST SIDE OF THE FLATHEAD RIVER. HORSE PACK WEST ON POSTED TRAIL TO SUMMIT AND STATION, A 3-HOUR HORSE PACK. THERE IS WATER IN GREEN TIMBER JUST AFTER LEAVING BURNED OVER AREA. UNDERGROUND, REFERENCE AND AZIMUTH MARKS ARE STANDARD BRONZE DISKS SET IN OUTCROPPING BEDROCK AS DESCRIBED IN NOTES 8A, 12A AND 12A RESPECTIVELY. THERE IS NO WITNESS MARK. REFERENCE MARK NO. 1 IS IN THE TOP OF THE BEDROCK WHICH IS 8 INCHES BELOW DIRT SURFACE, ABOUT 6 FEET BELOW STATION LEVEL, AND STAMPED STANDARD NO. 1 1939. REFERENCE MARK NO. 2 IS IN THE TOP OF THE BEDROCK WHICH IS 1 FOOT BELOW GROUND LEVEL, ABOUT 2 FEET BELOW STATION LEVEL, AND IS STAMPED STANDARD NO. 2 1939. THE MARK IS 10 FEET SOUTHEAST OF THE SOUTHEAST CORNER OF LOOKOUT HOUSE. AZIMUTH MARK IS ABOUT 100 METERS EAST OF THE SIGN MARKING THE JUNCTION OF TRAIL 49 AND TRAIL 311, ABOUT 50 FEET NORTH AND 40 FEET ABOVE TRAIL 49, 10 FEET WEST OF A 6-INCH TRIANGULAR TREE BLAZE, 6 FEET NORTH OF A TELEPHONE LINE, TOWARD THE UPPER PART OF A SERIES OF SMALL LEDGES, IN THE CENTER OF ONE OF THESE LEDGES, ABOUT 350 FEET BELOW STATION LEVEL, AND IS STAMPED STANDARD 1939. ALL OBJECTS ARE VISIBLE FROM A 4-FOOT STAND BUT THE LOOKOUT HOUSE WOULD BLOCK OUT OBJECTS FROM SOUTH-SOUTHWEST TO WEST. HEIGHT OF LIGHT ABOVE STATION MARK - 1-1/2 METERS.
01/01/1956 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1956 (VRS) THE STATION MARK AND AZIMUTH MARK WERE RECOVERED IN GOOD CONDITION. REFERENCE MARK NUMBER 1 WAS UNDER A FOUR FOOT SNOW BANK AND WAS NOT SEARCHED FOR. REFERENCE MARK NUMBER 2 IS EVIDENTLY COVERED BY DEBRIS AND COULD NOT BE FOUND. THE ORIGINAL DESCRIPTION BY A.N.S. IN 1939 IS ADEQUATE EXCEPT THAT THE DESCRIBED LOOKOUT HOUSE HAS BEEN DESTROYED AND ONLY THE FOUNDATION REMAINS.
01/01/1959 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1959 (OSR) STATION WAS RECOVERED AS DESCRIBED AND ALL MARKS WERE FOUND IN GOOD CONDITION. STANDARD LOOKOUT HOUSE HAS BEEN BURNED DOWN BUT THE FOUNDATION REMAINS AND IS A GOOD LANDMARK. A DISCREPANCY OF 5 MINUTES AND 4 SECONDS WAS FOUND IN THE DIRECTION TO REFERENCE MARK 2 AND A DISCREPANCY OF 8 MINUTES AND 8 SECONDS IN THE DIRECTION TO REFERENCE MARK 1 WAS FOUND. ADDITIONAL MEASUREMENTS FOLLOW. STATION MARK IS 27 FEET WEST OF A TRIANGLE BLAZE ON THE NORTHWEST SIDE OF A 6-INCH SPRUCE TREE AND 17 FEET NORTHEAST OF THE NORTHEAST CORNER OF THE FOUNDATION OF THE LOOKOUT HOUSE. REFERENCE MARK 1 IS 84 FEET NORTHEAST OF THE NORTHEAST CORNER OF THE FOUNDATION AND 35 FEET NORTHEAST OF THE TRIANGLE BLAZE ON THE 6-INCH SPRUCE TREE. IT IS MARKED BY A 1 IN X 4 IN BOARD IN THE CENTER OF A SMALL CAIRN. REFERENCE MARK 2 IS 52 FEET SOUTHWEST OF THE TRIANGLE BLAZE ON THE 6-INCH SPRUCE TREE AND IS MARKED BY A 1 IN X 4 IN BOARD IN THE CENTER OF A SMALL CAIRN.
01/01/1960 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1960 (OSR) ALL MARKS ARE IN GOOD CONDITION. THE 1959 DESCRIPTION IS ADEQUATE EXCEPT FOR THE FOLLOWING--A DIFFERENCE WAS NOTED IN THE OBSERVED DIRECTIONS TO BOTH REFERENCE MARKS AS COMPARED WITH THE 1959 OBSERVATIONS, HOWEVER THE 1960 DIRECTIONS ARE IN AGREEMENT WITH THE 1939 OBSERVATIONS. DISTANCE AND DIRECTIONS OBSERVED IN 1960--

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.