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Details for Benchmark: LN0277

N 40° 22.117 W 109° 23.250 (NAD 83)

Altitude: 4866.67

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

Location:
In UINTAH county, UT View Original Datasheet
Designation:
L 27
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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Passing thru the area and picking up a few benchmarks and geocaches along the way.

as previously found

Metal WP visible from US 40.

[Photos:]
photoLN0277 L 27 4862.543
photoLN0277 NE
N 40° 22.140 W 109° 23.264

Bench Mark L 27 was recovered in good condition. It was as described, except that there is no longer a fence, and it is located at Milepost 154.89 of U.S. Highway 40.

[Photos:]
photoLN0277 20060704 G (Uintah Co. CO)
Bench Mark L 27 w/GPSr.
photoLN0277 20060704 C (Uintah Co. CO)
Bench Mark L 27.
photoLN0277 20060704 B (Uintah Co. CO)
Bench Mark L 27 from Eye Level.
photoLN0277 20060704 A1 S (Uintah Co. CO)
South at Bench Mark L 27.
photoLN0277 20060704 A2 W (Uintah Co. CO)
West at Bench Mark L 27.
photoLN0277 20060704 A3 N (Uintah Co. CO)
North at Bench Mark L 27.
N 40° 22.141 W 109° 23.263

Found this while working on a locationless cache for bench marks. Just checked my notes on that and all checks out. So I'm claiming it as my first find. Its in good condition. Has a posted sign nearby warning against vandalism. - ST, Vernal, Utah (BM #1)

[last edit: 9/25/2002 3:36:42 PM PST]

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1933 2.8 MI W FROM JENSEN. ABOUT 2.8 MILES WEST ALONG U.S. HIGHWAY 40 FROM JENSEN, UINTAH COUNTY, ABOUT 1.1 MILES EAST OF THE ASHLEY CREEK BRIDGE, AT THE EAST END OF A CUT ON THE TOP OF A RIDGE, AND ABOUT 50 FEET SOUTH OF THE CENTER LINE OF THE HIGHWAY. A STANDARD DISK, STAMPED 4862.543 L 27 1933 AND SET IN THE TOP OF A CONCRETE POST.
01/01/1981 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1981 IT IS IN CLAY AND LOOKS LIKE IT MIGHT HAVE TILTED SLIGHTLY. A WITNESS POST WAS SET NEAR THE MARK AND NEW MEASUREMENT ARE GIVEN. THE LOCATION OF THE MARK IS GOOD. THE BENCH MARK IS 7.0 M (23 FEET) SOUTH-SOUTHEAST FROM THE EDGE OF THE SOUTHERN ROAD CUT AND 1.5 M (5 FEET) NORTH FROM THE SOUTHERN RIGHT OF WAY FENCE FOR U.S. HIGHWAY 40.
01/01/1984 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1984 RECOVERED IN GOOD CONDITION. A NEW DESCRIPTION FOLLOWS. 4.3 KM (2.65 MI) WESTERLY ALONG U.S. HIGHWAY 40 FROM THE POST OFFICE IN JENSEN, 0.4 KM (0.25 MI) EAST OF MILEPOST 156, ON TOP OF THE HIGHWAY CUT, 27.9 M (91.5 FT) SOUTH OF THE CENTERLINE OF THE HIGHWAY, AND 1.6 M (5.2 FT) NORTH OF A FENCE. THE MARK IS 0.5 METERS W FROM A WITNESS POST THE MARK IS 4.6 M ABOVE THE HIGHWAY.

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. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
  • 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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