Details for Benchmark: AW2197
N 29° 57.767 W 095° 55.450 (NAD 83)
Coordinates may not be exact. Altitude is VERTCON and location is SCALED. (more info)
- In WALLER county, TX View Original Datasheet
- J 1026
- Marker Type:
- bench mark disk
- set into the top of a round concrete monument
- May hold, but of type commonly subject to surface motion.
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Documented History (by the NGS)
|01/01/1954 by CGS (MONUMENTED)
|DESCRIBED BY COAST AND GEODETIC SURVEY 1954
8.1 MI S FROM WALLER. 1.15 MILES EAST ALONG U.S. HIGHWAY 290 FROM THE TEXAS AND NEW ORLEANS RAILROAD STATION AT WALLER, THENCE 6.0 MILES SOUTH ALONG MATHIS ROAD, THENCE 0.95 MILE WEST ALONG A GRAVELED ROAD, 45 FEET SOUTH OF THE CENTER LINE OF AN EAST AND WEST GRAVELED ROAD, 55 FEET WEST OF THE CENTER LINE OF A GRAVELED ROAD LEADING SOUTH, 1 FOOT NORTH OF A FENCE, 2 FEET EAST OF A WITNESS POST, SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 0.7 FOOT ABOVE THE GROUND.
|01/01/1978 by NGS (GOOD)
|RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978
RECOVERED IN GOOD CONDITION.
- The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
- The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
- The geoid height was determined by GEOID99.