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Details for Benchmark: AX0996

N 29° 54.400 W 096° 52.600 (NAD 83)

Altitude: 270.01

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

Location:
In FAYETTE county, TX View Original Datasheet
Designation:
B 1197
Marker Type:
bench mark disk
Setting:
footings/foundation walls of small/medium structures
Stability:
May hold, but of type commonly subject to surface motion.

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Woo hoo! Our 137th benchmark!

[Photos:]
photo

I found it when in the area.

[Photos:]
photoAX0996

Found in good condition during a 13 hour benchmark hunting day... Partially hidden by rubber mat but should have been found by previous logger.

[Photos:]
photoAX0996
photoAX0996 setting

Could not locate this one. It looks as if a new handicap access ramp may have been built over it.

TxHiPowr

Documented History (by the NGS)

01/01/1972 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1972 IN LA GRANGE. AT LA GRANGE, IN THE NORTH ANGLE OF THE INTERSECTIN OF COLORADO AND JEFFERSON STREETS (U.S. HIGHWAY 77), SET IN THE TOP OF THE CONCRETE FOUNDATION WHICH EXTENDS OUT FROM THE SOUTHEAST WALL OF THE POST OFFICE BUILDING, 21.6 FEET SOUTHWEST OF THE EAST CORNER OF THE BRICK BUILDING, 49.5 FEET NORTHWEST OF THE NORTHWEST CURB OF COLORADO STREET, 12 1/2 FEET NORTHEAST OF THE CENTER OF THE SOUTHEAST ENTRANCE TO THE BUILDING, AND ABOUT 3 FEET ABOVE THE LEVEL OF THE GROUND.
01/01/1978 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978 RECOVERED IN GOOD CONDITION.
01/01/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (HY) RECOVERED IN GOOD CONDITION.
01/01/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (MVM) RECOVERED IN GOOD CONDITION.
01/01/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (TNC) RECOVERED IN GOOD CONDITION.
01/01/1987 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1987 RECOVERED IN GOOD CONDITION. DISK ORIGIN IS CGS.

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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