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Details for Benchmark: AW4698

N 29° 35.983 W 095° 48.533 (NAD 83)

Altitude: 92.9

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

Location:
In FORT BEND county, TX View Original Datasheet
Designation:
K 1212
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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I had to move a little dirt with my shoe to find the mark.

[Photos:]
photoAW4698 scene
photoAW4698 close

Recovered as described in good condition.

[Photos:]
photoAW4698
photoAW4698 setting

Documented History (by the NGS)

01/01/1973 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1973 3.0 MI N FROM ROSENBERG. 0.25 MILE WEST ALONG THE ATCHISON, TOPEKA AND SANTA FE RAILWAY FROM THE STATION AT ROSENBERG, THENCE 2.75 MILES NORTH ALONG FARM ROAD 723, AT THE JUNCTION OF A FIELD ROAD EAST ACROSS A CATTLEGUARD, IN THE TOP OF THE NORTHWEST CORNER OF THE CONCRETE FOUNDATION OF A STEEL RAIL CATTLEGUARD, 57 FEET EAST OF THE CENTER LINE OF THE ROAD, 8 FEET NORTH OF THE CENTER LINE OF THE FIELD ROAD, 94 FEET SOUTH OF T JUNCTION POWER POLE 2518, 2.9 FEET WEST OF A FENCE, AND ABOUT LEVEL WITH THE ROAD.
01/01/1986 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1986 RECOVERED IN GOOD CONDITION.
01/01/1988 by USPSQD (POOR)
RECOVERY NOTE BY US POWER SQUADRON 1988 (LT) MARK RECOVERED IN POOR CONDITION.
01/01/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (DB) RECOVERED IN GOOD CONDITION.
12/04/1993 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1993 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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