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Details for Benchmark: AX0058

N 29° 43.350 W 096° 08.383 (NAD 83)

Altitude: 149

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

Location:
In AUSTIN county, TX View Original Datasheet
Designation:
B 212
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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Not sure why this wasn't found back in 1959, but I found easily. Very good condition.

[Photos:]
photoAX0058
photoAX0058 setting

Documented History (by the NGS)

01/01/1934 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1934 4.25 MI S FROM SEALY. ABOUT 4-1/4 MILES SOUTH ALONG THE GULF, COLORADO AND SANTA FE RAILWAY FROM THE STATION AT SEALY, AUSTIN COUNTY, ABOUT 0.3 MILE NORTH OF MILE POLE 90, AT A DIRT-ROAD CROSSING, 42 FEET EAST OF THE EAST RAIL, 34 FEET NORTH OF THE CENTER LINE OF THE ROAD, 3.5 FEET NORTHEAST OF A FENCE CORNER, 2.6 FEET EAST OF THE RIGHT-OF-WAY FENCE, 3 FEET SOUTH OF A WHITE WOODEN WITNESS POST, AND ABOUT 4 FEET LOWER THAN THE TRACK. A STANDARD DISK, STAMPED 149.065 B 212 1934 AND SET IN THE TOP OF A CONCRETE POST PROJECTING ABOUT 0.4 FOOT ABOVE GROUND.
01/01/1959 by USGS (MARK NOT FOUND)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1959 MARK NOT FOUND.

Control Text

  • 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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.

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