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Details for Benchmark: SQ0372

N 47° 36.100 W 107° 38.233 (NAD 83)

Altitude: 2320.16

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

Location:
In GARFIELD county, MT View Original Datasheet
Designation:
M 38
Marker Type:
bench mark disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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Road alignment has changed. Station is 56 feet east of the new center line.

[Photos:]
photoSQ0372 M 38
photoSQ0372 SW

Documented History (by the NGS)

01/01/1931 by CGS (MONUMENTED)
01/01/1965 by USGS (GOOD)
DESCRIBED BY US GEOLOGICAL SURVEY 1965 27.2 MI NW FROM BRUSETT. ABOUT 28.2 MILES NORTHWEST ALONG THE DEVIL CREEK ROAD FROM BRUSETT, GARFIELD COUNTY, AT THE VALLEY OPENING INTO FORT ROCK RESERVOIR, AT A ROAD BEND NORTH, 245 FEET SOUTH AND 52 FEET EAST, 74 FEET NORTHEAST OF AN OLD BRIDGE. A STANDARD DISK STAMPED 2317.728 M-38 1931 AND SET IN THE TOP OF A CONCRETE POST.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (g = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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