BL1849 - "X 1252" vertical control mark - Waller, TX
Posted by: Groundspeak Premium Member Raven
N 30° 03.104 W 095° 54.649
15R E 219343 N 3328089
This benchmark is located on the SW headwall of a culvert underneath Old Hempstead Hwy (US Hwy BUS-290), about 800 ft SE of its intersection with FM-2920 in Waller, Texas.
Waymark Code: WMNE7X
Location: Texas, United States
Date Posted: 02/26/2015
Published By:Groundspeak Premium Member Ernmark
Views: 1

As described by the National Geodetic Survey in 1978:

"1.0 MI SE FROM WALLER.
ABOUT 1.0 MILE SOUTHEAST ALONG U.S. HIGHWAY 290 FROM THE JUNCTION OF ALLIANCE STREET AND U.S. HIGHWAY 290 IN WALLER, SET IN TOP OF THE SOUTHWEST HEADWALL TO A 4X6 BOX CULVERT, 48.5 FEET NORTHEAST OF THE NORTHEAST RAIL, 19 FEET SOUTHWEST OF THE CENTERLINE OF THE EAST BOUND LANES OF U.S. HIGHWAY 290, AND 9.5 FEET SOUTHEAST OF THE NORTHWEST END OF THE RETAINING WALL."

The NGS description and associated reference points (i.e. distances/directions) are a good starting point for locating this station, however please note the following updates )as of the last recovery by a fellow geocacher back in 2007):
* US Hwy 290 has moved further up North, the referenced highway is now called "Old Hempstead Hwy", or "US Hwy BUS-290".
* The distance to the junction with Alliance St is actually closer to 1.13 miles (not 1.0 miles).

(See posted waymark's gallery images for BM close-up and setting details).

The most recently posted NGS Data Sheet's coordinates seemed to match reasonably well with my own personal observations, with just a 7ft difference: it states "N 30 03 03.06 W 095 54 31.56", which was in line with my findings as measured with 10' accuracy and 10+ reading averages: "N 30° 03.104 W 095° 54.649".

---

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

BL1849 ***********************************************************************
BL1849 DESIGNATION - X 1252
BL1849 PID - BL1849
BL1849 STATE/COUNTY- TX/HARRIS
BL1849 COUNTRY - US
BL1849 USGS QUAD - WALLER (1980)
BL1849
BL1849 *CURRENT SURVEY CONTROL
BL1849 ______________________________________________________________________
BL1849* NAD 83(1986) POSITION- 30 03 06.2 (N) 095 54 38.9 (W) HD_HELD2
BL1849* NAVD 88 ORTHO HEIGHT - 78.93 (+/-2cm) 259.0 (feet) VERTCON
BL1849 ______________________________________________________________________
BL1849
BL1849_MARKER: DV = VERTICAL CONTROL DISK
BL1849_SETTING: 32 = SET IN A RETAINING WALL OR CONCRETE LEDGE
BL1849_SP_SET: HEADWALL
BL1849_STAMPING: X 1252 1978
BL1849_MARK LOGO: NGS
BL1849_STABILITY: C = MAY HOLD, BUT OF TYPE COMMONLY SUBJECT TO
BL1849+STABILITY: SURFACE MOTION
BL1849_SATELLITE: THE SITE LOCATION WAS REPORTED AS SUITABLE FOR
BL1849+SATELLITE: SATELLITE OBSERVATIONS - February 18, 2006
BL1849
BL1849 HISTORY - Date Condition Report By
BL1849 HISTORY - 1978 MONUMENTED NGS
BL1849 HISTORY - 1986 GOOD NGS
BL1849 HISTORY - 19990715 GOOD USPSQD
BL1849 HISTORY - 20060218 GOOD USPSQD
Condition: Mark found in good condition

Designation: X 1252

Benchmark Agency: National Geodetic Survey

Monumentation type: Vertical Control Mark

County: Waller (Harris County)

USGS 7.5' Topographic Quadrangle Name (optional): Waller

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: BL1849

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 BL1849 - "X 1252" vertical control mark - Waller, TX 01/30/2015 Raven visited it