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Details for Benchmark: BM0147

N 30° 05.017 W 096° 02.350 (NAD 83)

Altitude: 220.4

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

Location:
In WALLER county, TX View Original Datasheet
Designation:
W 1027
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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N 30° 05.027 W 096° 02.378

It had been almost 8 years since Doc Geo last checked on it so I went ahead and gave it a try. Yes, the BM is still there, so the "07/26/1991 by USPSQD (MARK NOT FOUND)" remark is incorrect.

Recovered in good condition, and the survey mark is also there... probably a new one?

I'm posting some new coordinates (10' accuracy, per my GPSr at the time), as obviously the original ones placed this BM on the SE end of Bus 290 and 359, i.e. the wrong side of the intersection (read: it's on the SW side, not SE side). The original description helped a lot in making sure I was looking in the right place.

[Photos:]
photoBM0147 - W 1027 - 1
photoBM0147 - W 1027 - 2
photoBM0147 - W 1027 - 3
photoBM0147 - W 1027 - 4

Recovered as described in good condition.

[Photos:]
photoBM0147
photoBM0147 setting

Found for 2006 Benchmark Contest.

[Photos:]
photoDisk Closeup
photoMonument Area

Someone didn't look very closely...no witness post, but the marker is right where it's supposed to be. Add to the description 6 feet SE of a telephone box. Apparently someone has been here recently, because there is a fairly new wooden stake with _USGS_Elevation_(some numbers) written on it, stuck in the ground against the marker.

[last edit: 8/30/2003 11:50:58 AM PST]

Documented History (by the NGS)

01/01/1954 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1954 2.45 MI E FROM HEMPSTEAD. 2.45 MILES EAST ALONG U.S. HIGHWAY 290 FROM THE COURTHOUSE AT HEMPSTEAD, 41 FEET SOUTH OF THE CENTER LINE OF THE SOUTH LANE OF THE HIGHWAY, 101 FEET NORTHWEST OF THE CENTER OF THE CROSSING OF FARM ROAD 359 AND THE TEXAS AND NEW ORLEANS RAILROAD, 44 FEET NORTH OF THE NORTH RAIL, 9 FEET SOUTHEAST OF A POWER POLE, 2.6 FEET EAST OF A WITNESS POST, SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 0.6 FOOT ABOVE THE GROUND.
07/26/1991 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1991 (RAL) MARK NOT FOUND.

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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