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Details for Benchmark: AW5545

N 29° 28.650 W 095° 57.000 (NAD 83)

Altitude: 102.22

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

Location:
In FORT BEND county, TX View Original Datasheet
Designation:
H 1506
Marker Type:
metal rod
Setting:
stainless steel rod
Stability:
Probably hold position/elevation well.

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Couldn't see it. Doc Geo's milepost 10 not there.

Recovered as described in good condition. Cap and identifying ring with stamping were gone, but as shown in the second picture, it is close to the railroad milepost #10 which is laying on the ground nearby...

[Photos:]
photoAW5545 with old railroad in background
photoAW5545 with railroad milepost 10 laying nearby

Documented History (by the NGS)

01/01/1987 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1987 3.2 KM (2.0 MI) SW FROM BEASLEY. 3.2 KM (2.0 MI) SOUTHWEST ALONG BUSINESS ROUTE 59 FROM THE POST OFFICE IN BEASLEY, THENCE 0.95 KM (0.59 MI) SOUTHWEST ALONG US HIGHWAY 59, 17.8 METERS (58.5 FT) NORTHWEST OF THE CENTERLINE OF THE SOUTHWEST BOUND LANES OF THE HIGHWAY, 78.0 METERS (256 FT) SOUTHWEST OF THE CENTERLINE OF GRUNWALD ROAD, 12.1 METERS (39.7 FT) SOUTHEAST OF THE SOUTHEAST RAIL OF THE SOUTHERN PACIFIC COMPANY RAILROAD, 0.9 METER (3.0 FT) NORTHEAST OF RAILROAD MILEPOST 10. NOTE--ACCESS TO DATUM POINT IS HAD THROUGH A 5-INCH LOGO CAP. THE MARK IS 0.3 METERS SW FROM A WITNESS POST THE MARK IS 0.6 M BELOW THE HIGHWAY.
12/10/1995 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1995 RECOVERED IN GOOD CONDITION.
11/22/1997 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1997 RECOVERED IN GOOD CONDITION.
02/07/1998 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1998 RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (G = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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