BL1164 - "L 1149" bench mark disk - Conroe, TX
Posted by: Groundspeak Premium Member Raven
N 30° 17.358 W 095° 27.349
15R E 263796 N 3353396
This benchmark is located near the railroad tracks jsut south of Foster Drive at its intersection with Frazier Street in Conroe, Texas.
Waymark Code: WM11G0N
Location: Texas, United States
Date Posted: 10/17/2019
Published By:Groundspeak Premium Member Ernmark
Views: 2

As described by the NGS in 1973 (although already monumented by the CGS back in 1959):

"[...] ABOUT 1.4 MILES SOUTH ALONG THE MISSOURI-PACIFIC RAILROAD FROM THE STATION AT CONROE [...] 33.7 FEET EAST OF THE EAST RAIL, 26 FEET WEST OF THE CENTER LINE OF A GRAVEL ROAD PARALLEL TO THE TRACKS ON THE EAST SIDE, 5.2 FEET NORTH OF A POWER POLE, 1.1 FEET SOUTH OF A METAL WITNESS POST, AND ABOUT 1 FOOT BELOW THE LEVEL OF THE RAIL, SET IN THE TOP OF A CONCRETE POST FLUSH WITH THE GROUND.."

Save for the metal witness post (it's now just a wooden survey stake), the NGS description is still pretty accurate -- and so are the distance estimates. The station is located just south of Foster Road, at its T-intersection with S Frazier Street. Given its concrete post, it's hard to miss once in the general area.

The NGS' currently posted coordinates ("N 30 17 21.67520 W 095 27 20.93404") seemed quite accurate as well: my measurements were "N 30° 17.358 W 95° 27.349" based on 10+ readings within 10' accuracy.

The station was recovered in good condition.

---

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

BL1164 ***********************************************************************
BL1164 HT_MOD - This is a Height Modernization Survey Station.
BL1164 DESIGNATION - L 1149
BL1164 PID - BL1164
BL1164 STATE/COUNTY- TX/MONTGOMERY
BL1164 COUNTRY - US
BL1164 USGS QUAD - CONROE (1976)
BL1164
BL1164 *CURRENT SURVEY CONTROL
BL1164 ______________________________________________________________________
BL1164* NAD 83(2011) POSITION- 30 17 21.67520(N) 095 27 20.93404(W) ADJUSTED
BL1164* NAD 83(2011) ELLIP HT- 23.369 (meters) (06/27/12) ADJUSTED
BL1164* NAD 83(2011) EPOCH - 2010.00
BL1164* NAVD 88 ORTHO HEIGHT - 51.05 (meters) 167.5 (feet) GPS OBS
BL1164 ______________________________________________________________________
BL1164 NAVD 88 orthometric height was determined with geoid model GEOID99
BL1164 GEOID HEIGHT - -27.443 (meters) GEOID99
BL1164 GEOID HEIGHT - -27.534 (meters) GEOID18
BL1164 NAD 83(2011) X - -524,086.520 (meters) COMP
BL1164 NAD 83(2011) Y - -5,487,197.440 (meters) COMP
BL1164 NAD 83(2011) Z - 3,198,123.822 (meters) COMP
BL1164 LAPLACE CORR - 0.25 (seconds) DEFLEC18
BL1164
BL1164_MARKER: DB = BENCH MARK DISK
BL1164_SETTING: 7 = SET IN TOP OF CONCRETE MONUMENT
BL1164_STAMPING: L 1149 1959
BL1164_MARK LOGO: CGS
BL1164_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
BL1164+STABILITY: SURFACE MOTION
BL1164_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
BL1164+SATELLITE: SATELLITE OBSERVATIONS - February 18, 2010
BL1164
BL1164 HISTORY - Date Condition Report By
BL1164 HISTORY - 1959 MONUMENTED CGS
BL1164 HISTORY - 1973 GOOD NGS
BL1164 HISTORY - 1978 GOOD NGS
BL1164 HISTORY - 1987 GOOD NGS
BL1164 HISTORY - 20010709 GOOD JCLS
BL1164 HISTORY - 20040802 GOOD DEWDAV
BL1164 HISTORY - 20040805 GOOD DEWDAV
BL1164 HISTORY - 20050929 GOOD USPSQD
BL1164 HISTORY - 20070627 GOOD JCLS
BL1164 HISTORY - 20100218 GOOD BSLN
Condition: Mark found in good condition

Designation: L 1149 (or "L1149 1959", 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): Conroe

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: BL1164

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

Visit Instructions:
  1. A closeup photo of the mark taken by you is required.
  2. A 'distant' photo including the mark in the view is highly recommended. Include the compass direction you faced when you took the picture.
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Raven visited BL1164 - "L 1149" bench mark disk - Conroe, TX 08/30/2019 Raven visited it