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Details for Benchmark: BM0068

N 30° 22.467 W 096° 04.967 (NAD 83)

Altitude: 218.4

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

Location:
In GRIMES county, TX View Original Datasheet
Designation:
T 206
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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visited with a local resident who lives about 200 yards from where this is supposed to be. He says the water tower was bulldozed a few years ago, from the official NGS sheet, it was sometime after 1991, because it was not found in 1999 but was there in '91.

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1933 1.0 MI S FROM NAVASOTA. 1.0 MILES SOUTH OF, ALONG TEXAS AND NEW ORLEANS RAILROAD ABOUT 300 YARDS NORTH OF MILEPOST 70, AT A WATER TOWER SET HORIZONTAL IN CONCRETE BASE OF WEST LEG OF TOWER.
01/01/1954 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1954 RECOVERED IN GOOD CONDITION.
06/22/1991 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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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