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Details for Benchmark: BM0146

N 30° 04.800 W 096° 01.400 (NAD 83)

Altitude: 249.3

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

Location:
In WALLER county, TX View Original Datasheet
Designation:
B 1029
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° 04.816 W 096° 01.433

It had been approx. 7.5 years since someone last checked on it so I went ahead and gave it a try as well. Yes, the BM is still there.

Recovered in fair (not "good") condition: the disk is slightly bent and the monument is missing a piece of concrete: it looks like some machinery may have bumped into it a bit. Also, no witness post by apparently a wooden structure all around it, as if to make sure the "bump incident" does not occur again, perhaps?

I disturbed an ant pile while cleaning up the BM prior to getting ready to take pictures, so was unable to clear it all up before I had to take the snapshots and move away from the ants (which were already invading the disk, see pics).

Last but not least, I'm posting some new coordinates (10' accuracy, per my GPSr at the time) for the next finder (in the hopes the search won't take too long, and it the hopes that it won't take another 7+ years until the next visit).

[Photos:]
photoBM0146 - B 1029 - 1
photoBM0146 - B 1029 - 2
photoBM0146 - B 1029 - 3
photoBM0146 - B 1029 - 4

Recovered as described in good condition.

[Photos:]
photoBM0146
photoBM0146 setting

Recovered in good condition. No witness post.

[Photos:]
photoDisk Closeup
photoMonument Area

Documented History (by the NGS)

01/01/1954 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1954 3.35 MI E FROM HEMPSTEAD. 3.35 MILES EAST ALONG U.S. HIGHWAY 290 FROM THE COURTHOUSE AT HEMPSTEAD, 51 FEET NORTH OF THE CENTER LINE OF THE HIGHWAY, 0.15 MILE EAST OF A ROADSIDE PARK, 1.7 FEET SOUTH OF A FENCE, 3 FEET EAST OF A WITNESS POST, SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 0.7 FOOT ABOVE THE GROUND.
07/26/1991 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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