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Details for Benchmark: BM0079

N 30° 09.950 W 096° 04.400 (NAD 83)

Altitude: 274.3

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

Location:
In WALLER county, TX View Original Datasheet
Designation:
Z 206
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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Recovered as described in good condition.

[Photos:]
photoBM0079 setting
photoBM0079

Found for the 2006 Benchmark Contest.

[Photos:]
photoMonument Area
photoDisk Closeup

This was a bit of a challenge. Finally spotted it over the fence. Its about 8 feet west of the fence and 3 feet south-southwest of an old fencepost.

N30 09 57.7 W096 04 31.4

[Photos:]
photoArea photo
photoCloseup

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
01/01/1954 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1954 0.5 MI N FROM HOWTH. 0.5 MILE NORTH ALONG THE TEXAS AND NEW ORLEANS RAILROAD FROM THE STATION SIGN AT HOWTH, 100 FEET WEST OF THE WEST RAIL, 31 FEET WEST OF THE CENTER LINE OF A GRAVELED ROAD, 0.1 MILE NORTH OF FARM ROAD 1736, 2 FEET SOUTH OF A FENCE, 10 FEET WEST OF A WITNESS POST, SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 0.7 FOOT ABOVE THE GROUND.
07/14/1991 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1991 (RAL) RECOVERED IN GOOD CONDITION.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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