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Details for Benchmark: NE0364

N 42° 37.733 W 083° 17.400 (NAD 83)

Altitude: 932.16

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

Location:
In OAKLAND county, MI View Original Datasheet
Designation:
L 43
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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Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
01/01/1939 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1939 0.8 MI SE FROM PONTIAC. 0.8 MILE SOUTHEAST ALONG THE GRAND TRUNK WESTERN RAILWAY FROM THE STATION AT PONTIAC, OAKLAND COUNTY, 70 FEET WEST OF THE CROSSING OF THE MICHIGAN AIRLINE RAILROAD, AT THE SOUTHEAST CORNER OF THE PONTIAC VARNISH COMPANY, 33.6 FEET EAST OF THE SOUTH ENTRANCE, AND 4 FEET WEST OF THE WEST CURB OF BRANCH STREET. A STANDARD DISK, STAMPED L 43 1934 AND SET IN THE TOP OF A CONCRETE POST.
12/30/1994 by LOCENG (MARK NOT FOUND)
RECOVERY NOTE BY LOCAL ENGINEER (INDIVIDUAL OR FIRM) 1994 (SFM) MARK NOT FOUND.
12/30/1994 by LOCENG (MARK NOT FOUND)
RECOVERY NOTE BY LOCAL ENGINEER (INDIVIDUAL OR FIRM) 1994 (SFM) MARK NOT FOUND.
02/08/1997 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1997 MARK NOT FOUND.

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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