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Details for Benchmark: BL2072

N 30° 02.197 W 094° 03.614 (NAD 83)

Altitude: 26

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

Location:
In JEFFERSON county, TX View Original Datasheet
Designation:
SPINDLE TOP
Marker Type:
metal rod
Setting:
surrounded by a mass of concrete
Stability:

Reference Points

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Documented History (by the NGS)

01/01/1911 by USE (MONUMENTED)
DESCRIBED BY US ENGINEERS 1911 ABOUT 12 MILES ABOVE THE MOUTH OF THE NECHES RIVER, 107 METERS FROM THE END OF THE UNION CANAL, AND 32 METERS FROM THE KANSAS CITY SOUTHERN RAILROAD TRACKS. STATION MARK IS A 3-INCH GALVANIZED-IRON PIPE, 4.5 FEET LONG, WITH A FLANGE AT THE BOTTOM, FILLED WITH AND SET IN CONCRETE. THE FOLLOWING DISTANCES AND BEARINGS ARE GIVEN--PILLAR OF THE AGITATOR AT THE FILTER PLANT, MARKED BY A TRIANGLE 4 FEET ABOVE THE GROUND, 11.3 METERS, N 26 DEG 51 MIN E. PILLAR OF THE AGITATOR AT THE FILTER PLANT, MARKED BY A TRIANGLE 3 FEET ABOVE THE GROUND, 12.5 METERS, N 72 DEG 36 MIN E. PIN OAK TREE, 20 INCHES IN DIAMETER, MARKED BY A TRIANGLE 5 FEET ABOVE THE GROUND, 18.0 METERS, S 86 DEG 27 MIN W.
01/01/1917 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1917 (JBB) FOUND AS DESCRIBED.
01/01/1933 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1933 (ERM) THE PIPE HAS BEEN PARTIALLY DUG UP BUT APPARENTLY NOT MOVED. A COLLAR OF CONCRETE 8 INCHES IN DIAMETER WAS CAST AROUND THE PIPE. THE TOPOGRAPHY HAS CHANGED SO A NEW DESCRIPTION IS SUBMITTED-- LOCATED ON THE HIGH BANK (20 FEET) 107 METERS FROM THE END OF THE OLD UNION CANAL, 1.3 MILES W OF THE NECHES RIVER, 28 METERS FROM THE LINE OF THE KANSAS CITY SOUTHERN RAILWAY, AND 7 METERS FROM A LITTLE-USED ROAD. TWO BRONZE REFERENCE DISKS SET IN CONCRETE WERE ESTABLISHED. REFERENCE MARK 1 TO THE N AND REFERENCE MARK 2 TO THE E. STATION MAY BE REACHED VIA THE CANAL WITH NOT OVER 2-FOOT DRAFT, AND VIA ROAD. A 30-FOOT SIGNAL WAS ERECTED. CLEARING WAS NECESSARY TO RANCH AND POWER.
01/01/1960 by USGS (MARK NOT FOUND)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1960 THE STATION MARK WAS SEARCHED FOR AND NOT FOUND. REFERENCE MARK NO. 2 WAS HOWEVER RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in February 1996.
  • The orthometric height was scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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