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Details for Benchmark: AX1487

N 29° 40.800 W 097° 04.650 (NAD 83)

Altitude: 389.5

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

Location:
In FAYETTE county, TX View Original Datasheet
Designation:
W 819
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Recovered as described in good condition.

[Photos:]
photoAX1487 setting
photoAX1487

Documented History (by the NGS)

01/01/1943 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1943 1.7 MI E FROM FLATONIA. TO REACH FROM THE METHODIST CHURCH AT FLATONIA, PROCEED 1.8 MILE EASTERLY ALONG U.S. HIGHWAY NO.90 TO A CONCRETE CULVERT AND SITE OF BENCH MARK. BENCH MARK IS SET HORIZONTALLY IN THE TOP OF THE WEST END OF THE NORTH HEADWALL OF A 4X18 FOOT THREE WAY CONCRETE BOX CULVERT UNDER THE HIGHWAY. IT IS 23.7 FEET NORTH OF AND ABOUT 1.0 FOOT BELOW THE CENTERLINE OF THE HIGHWAY.
01/01/1987 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1987 (WCJ) RECOVERED IN GOOD CONDITION.
01/01/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (LEG) RECOVERED IN GOOD CONDITION.
06/07/1997 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1997 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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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