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Details for Benchmark: NF1051

N 42° 48.100 W 084° 20.283 (NAD 83)

Altitude: 846.09

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

Location:
In SHIAWASSEE county, MI View Original Datasheet
Designation:
VCM 76003
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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good condition. flush. post there. N .078 W .402

This is one of two benchmarks we spotted the witness posts for on the way home from Sarnia to Charlotte. The disk is in great shape.

[Photos:]
photoNF1051 Disk
photoThe Witness Post
The witness post it the kind with the white top. Disk is located a few feet away next to the orange stake in the photo.
N 42° 48.074 W 084° 20.400

Found as described in good condition, with corrected coordinates. The disk is white and stamped Vertical Control Mark 76003 1976.

Documented History (by the NGS)

01/01/1976 by MIDH (MONUMENTED)
DESCRIBED BY MI DEPT OF HIGHWAYS 1976 2.3 MI W FROM SHAFTSBURG. IN SHIAWASSEE COUNTY, T5NR1E, WOODHULL TWP., SEC 28. BENCH MARK IS 9 MILES NORTHEAST OF EAST LANSING POST OFFICE ALONG TEMP I-69, 2.3 MILES WEST OF SHAFTSBURG, APPROX 500 FEET WEST OF BRIDGE OVER VERMILION CREEK, 46.8 FEET SOUTH OF CENTERLINE EASTBOUND LANE OF TEMP I-69, 11.5 FEET NORTH OF ROW FENCE, 4 FEET SOUTHWEST OF METAL WITNESS POST, SET FLUSH WITH GROUND AND LEVEL WITH CENTERLINE EASTBOUND LANE OF TEMP I-69.
08/31/1995 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1995 RECOVERED IN GOOD CONDITION.

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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