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Details for Benchmark: AX1331

N 29° 57.817 W 097° 27.400 (NAD 83)

Altitude: 471.4

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

Location:
In BASTROP county, TX View Original Datasheet
Designation:
T 784
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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Monument was laying on its side and buried enough so that only one face was visible. I excavated it and sat it upright but there is no way to know if this is the correct location.

[Photos:]
photoPartially excavated AX1331
photoAX1331 excavated and upright
photoAX1331

Documented History (by the NGS)

01/01/1943 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1943 0.8 MI NW FROM REDROCK. 0.8 MILE NORTHWEST ALONG THE MISSOURI-KANSAS-TEXAS RAILROAD FROM THE STATION AT REDROCK, AT A DIRT ROAD CROSSING, 27 FEET NORTHEAST OF THE CENTERLINE OF THE ROAD, 33 FEET SOUTHEAST OF THE CENTERLINE OF THE TRACK, 25 FEET FROM THE RIGHT-OF-WAY FENCE ALONG THE EDGE OF A CEMETERY, 3 FEET FROM A WHITE WOODEN WITNESS POST, AND 3.5 FEET HIGHER THAN THE TRACK. A STANDARD DISK, STAMPED T 784 1943 AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.5 FOOT ABOVE GROUND.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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