BL1173 - "T 88" bench mark disk - Oak Ridge North, TX - U.S. Benchmarks on Waymarking.com

As described by the NGS in 1973 (although already monumented by the CGS back in 1932):

"[...] 103 FEET SOUTH OF A POWER POLE SUPPORTING 3 TRANSFORMERS (NO. 13481), 53 FEET WEST OF THE CENTER LINE OF A GRAVEL ROAD, 45 FEET EAST OF THE EAST RAIL, 1.2 FEET NORTH OF A METAL WITNESS POST, AND ABOUT 1 FOOT BELOW THE LEVEL OF THE RAIL, SET IN THE TOP OF A CONCRETE POST PROJECTING 0.2 FOOT."

Save for the mention of the "GRAVEL ROAD" (it's now paved, and called "Old Hardy Road"), the NGS description is still pretty accurate, and so are the distance estimates from the rail tracks and the street... The witness post is still there as well.

The NGS' currently posted coordinates ("N 30 10 56.76 W 095 26 33.18") seemed reasonably accurate: my measurements were "N 30° 10.946 W 095° 26.555" based on 10+ readings within 10' accuracy.

The station was recovered in good condition.

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Below are some basic additional facts, per the NGS database (with some editing for length): (visit link)

BL1173 ***********************************************************************
BL1173 DESIGNATION - T 88
BL1173 PID - BL1173
BL1173 STATE/COUNTY- TX/MONTGOMERY
BL1173 COUNTRY - US
BL1173 USGS QUAD - TAMINA (1979)
BL1173
BL1173 *CURRENT SURVEY CONTROL
BL1173 ______________________________________________________________________
BL1173* NAD 83(1986) POSITION- 30 10 56.76 (N) 095 26 33.18 (W) HD_HELD1
BL1173* NAVD 88 ORTHO HEIGHT - 39.597 (meters) 129.91 (feet) ADJUSTED
BL1173 ______________________________________________________________________
BL1173 GEOID HEIGHT - -27.535 (meters) GEOID18
BL1173 DYNAMIC HEIGHT - 39.544 (meters) 129.74 (feet) COMP
BL1173 MODELED GRAVITY - 979,306.2 (mgal) NAVD 88
BL1173 OBS GRAVITY - 979,306.6 (mgal) GRAV_OBS
BL1173 VERT ORDER - FIRST CLASS I
BL1173
BL1173_MARKER: DB = BENCH MARK DISK
BL1173_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
BL1173_STAMPING: T 88 1932 131.020
BL1173_MARK LOGO: CGS
BL1173_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
BL1173+STABILITY: SURFACE MOTION
BL1173_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
BL1173+SATELLITE: SATELLITE OBSERVATIONS - September 29, 2005
BL1173
BL1173 HISTORY - Date Condition Report By
BL1173 HISTORY - 1932 MONUMENTED CGS
BL1173 HISTORY - 1973 GOOD NGS
BL1173 HISTORY - 1978 GOOD NGS
BL1173 HISTORY - 1987 GOOD NGS
BL1173 HISTORY - 20040226 GOOD ENGLE
BL1173 HISTORY - 20050929 GOOD USPSQD

Condition: Mark found in good condition Designation: T 88 (or "T88 1932", if one goes by the actual stamping) Benchmark Agency: U.S. Coast & Geodetic Survey Monumentation type: BENCH MARK (or B.M.) Disk County: Montgomery county, Texas USGS 7.5' Topographic Quadrangle Name (optional): Tamina Find type: Coordinates and/or to-reach information from the NGS database (or Geocaching's copy of it) were used Web address of this benchmark's datasheet (optional): [Web Link] NGS PID: BL1173 Benchmark Agency (if other): Not listed Monumentation type (if other): Not listed Special category (optional): Not listed Special Category (if other): Not listed Local database's URL (optional): Not listed

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