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Details for Benchmark: FB1785

N 35° 50.950 W 083° 33.817 (NAD 83)

Altitude: 910.13

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

Location:
In SEVIER county, TN View Original Datasheet
Designation:
T 47
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
01/01/1949 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1949 1.6 MI S FROM SEVIERVILLE. 1.55 MILES SOUTH ALONG STATE HIGHWAY 71 FROM SEVIERVILLE, SEVIER COUNTY, 0.95 MILE SOUTH OF HIGHWAY 35 AND 71 JUNCTION, AT A CONCRETE BOX CULVERT, IN THE CENTER OF THE TOP OF THE EAST HEADWALL, AND 11 FEET EAST OF THE CENTERLINE OF THE HIGHWAY. A STANDARD DISK, STAMPED T 47 1934.
01/01/1972 by TVA (GOOD)
RECOVERY NOTE BY TENNESSEE VALLEY AUTHORITY 1972 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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