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Details for Benchmark: BM0092

N 30° 06.917 W 096° 09.417 (NAD 83)

Altitude: 157.3

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

Location:
In WALLER county, TX View Original Datasheet
Designation:
E 207
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 is disturbed. Texas and New Orleans Railroad track no longer present. Witness post is gone.

[Photos:]
photoDisk Closeup
photoDisk Area

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
01/01/1954 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1954 5.0 MI W FROM HEMPSTEAD. 5.0 MILES WEST ALONG THE TEXAS AND NEW ORLEANS RAILROAD FROM THE STATION AT HEMPSTEAD, 2 1/2 POLES WEST OF MILEPOST 5, 41 FEET NORTH OF THE NORTH RAIL, 42 FEET SOUTH OF THE CENTER LINE OF A GRAVELED ROAD, 3 FEET EAST OF A WITNESS POST, 4 FEET BELOW THE TOP OF THE RAILS, SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 1.0 FOOT ABOVE THE 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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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