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Details for Benchmark: DN0670

N 33° 13.459 W 097° 07.683 (NAD 83)

Altitude: 672.61

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

Location:
In DENTON county, TX View Original Datasheet
Designation:
CIA
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.

Reference Points

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I guess CIA is supposed to be elusive. I found location where it should be. Marked with an Iron Rod. Maybe the disk is underground?

Documented History (by the NGS)

01/01/1935 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1935 (CAS) THIS STATION IS ON THE CAMPUS OF THE COLLEGE OF INDUSTRIAL ARTS FOR WOMEN IN DENTON. IN THE CENTER OF LAWN WHICH IS ENCIRCLED BY CONCRETE CAMPUS DRIVE. THE STATION MARK IS 156.1 FEET SE OF THE SW CORNER OF THE ADMINISTRATION BUILDING. 25.5 FEET S OF FLAGPOLE. THE MARK IS FLUSH WITH THE GROUND. SURFACE, UNDERGROUND, REFERENCE AND AZIMUTH MARKS ARE STANDARD BRONZE DISKS SET IN CONCRETE. REFERENCE MARK NO. 1 IS SSE OF THE STATION. 1 FOOT W OF CURB ON STUB OF CONCRETE DRIVE TO S. THE MARK PROJECTS 1 INCH. REFERENCE MARK NO. 2 IS W OF THE STATION. 1 FOOT N OF COLLEGE DRIVE CURB. 109.3 FEET SSW OF THE SW CORNER OF THE ADMINISTRATION BUILDING. THE MARK PROJECTS 1 INCH. THE AZIMUTH MARK IS SSE OF THE STATION. IN THE SE CORNER OF THE CAMPUS. AT THE INTERSECTION OF TEXAS STREET AND BELL AVENUE. 14 FEET W OF THE W CURB OF BELL AVENUE. 18 FEET N OF THE N CURB OF TEXAS STREET. THE MARK PROJECTS 1 INCH. ALL LIGHTS ARE VISIBLE AT 30 FEET.
01/01/1935 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1935 IN DENTON. AT DENTON, DENTON COUNTY, ON THE CAMPUS OF THE COLLEGE OF INDUSTRIAL ARTS FOR WOMEN, 156 FEET SOUTHEAST OF THE SOUTHWEST CORNER OF THE ADMINISTRATION BUILDING, AND 25.5 FEET SOUTH OF THE FLAGPOLE. A STANDARD TRIANGULATION-STATION DISK, STAMPED CIA 1935 AND SET IN THE TOP OF A CONCRETE POST FLUSH WITH THE GROUND.
01/01/1937 by TXHD (GOOD)
RECOVERY NOTE BY TEXAS HIGHWAY DEPARTMENT 1937 STATION AND REFERENCE MARKS NO. 2 WERE RECOVERED IN GOOD CONDITION. DESCRIPTION SATISFACTORY. NO ATTEMPT MADE TO RECOVER REFERENCE MARK NO. 1.
01/01/1938 by TXGS (GOOD)
RECOVERY NOTE BY TEXAS GEODETIC SURVEY 1938 STATION RECOVERED AND IS IN EXCELLENT CONDITION.
01/01/1949 by CGS (SEE DESCRIPTION)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1949 (OBH) THE AZIMUTH MARK IS DESTROYED.
01/01/1950 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1950 (BHR) STATION AND REFERENCE NO. 2 WERE RECOVERED IN GOOD CONDITION AS DESCRIBED. REFERENCE MARK NO. 1 WAS DESTROYED DURING THE CONSTRUCTION OF A TUNNEL LEADING TO THE NEW HOME ECONOMICS BUILDING. THE AZIMUTH MARK WAS NOT FOUND AND IS BELIEVED TO HAVE BEEN DESTROYED DURING THE CONSTRUCTION OF THE HOME ECONOMICS PRACTICE HOUSE. THE LINE TO THE AZIMUTH MARK IS NOW OBSTRUCTED BY THE NEW BUILDINGS. A NEW REFERENCE MARK WAS SET AS FOLLOWS. A STANDARD REFERENCE DISK STAMPED C.I.A. 1935, NO. 3, 1950 SET IN THE TOP OF THE CURB NORTH OF THE WALK AND AT THE BASE OF THE STEPS AT THE WEST END OF THE MAIN ENTRANCE TO THE ADMINISTRATION BUILDING. IT IS ABOUT 1 FOOT ABOVE THE LEVEL OF THE CIRCLE DRIVE PAVING. A NEW AZIMUTH MARK WAS NOT SET DUE TO THE ABSENCE OF AN INITIAL STATION.
01/01/1955 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1955 (JRM) STATION RECOVERED IN GOOD CONDITION.
01/01/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 (CLN) THE STATION AND REFERENCE MARKS 2 AND 3 WERE RECOVERED AS DESCRIBED IN 1950. THE AZIMUTH AND REFERENCE MARK 1 WAS REPORTED LOST AND WERE NOT FOUND AT THIS TIME. THEY ARE PRESUMED TO BE LOST DUE TO BUILDING CONSTRUCTION. THE DISTANCES AND DIRECTIONS TO THE REFERENCE MARKS CHECKED WITH THE 1950 DATA. A NEW DESCRIPTION FOLLOWS. THE STATION IS LOCATED ON THE CAMPUS OF THE TEXAS WOMANS UNIVERSITY AT DENTON, TEXAS. IT IS IN THE NORTHEAST SECTION OF DENTON AND SITS IN THE CENTER OF A GRASS AREA WITH A CIRCULAR DRIVEWAY SURROUNDING IT. THE STATION IS IN FRONT AND SOUTH OF THE ENTRANCE TO THE OLD ADMINISTRATION BUILDING WHICH HAS NOT BEEN USED SINCE 1956. IT IS 300 FEET WEST OF THE CENTER OF BELL STREET, 156 FEET SOUTHEAST OF THE SOUTHWEST CORNER OF THE BUILDING, 48 FEET NORTH OF A CONCRETE WATER MAIN CASING AND 25.5 FEET SOUTH-SOUTHEAST OF A METAL FLAGPOLE. THE MARKS ARE STANDARD CGS DISKS STAMPED CIA 1935. THE SURFACE DISK IS SET IN THE TOP OF A SQUARE CONCRETE MONUMENT SET FLUSH WITH THE GROUND. REFERENCE MARK 2 IS A STANDARD CGS DISK SET IN THE TOP OF A SQUARE CONCRETE MONUMENT PROJECTING 1 INCH AND IS STAMPED CIA NO2 1935. IT IS 90 FEET WEST OF THE CENTER OF A CIRCULAR DRIVE, 15 FEET SOUTHWEST OF A TWIN TRUNKED OAK TREE AND 1 FOOT NORTH OF A CURB. REFERENCE MARK 3 IS A STANDARD CGS DISK SET IN A DRILL HOLE IN THE CURB NORTH OF THE WALK AT THE WEST END OF THE STEPS TO THE OLD ADMINISTRATION BUILDING. IT IS STAMPED CIA 1935 NO3 1950.
01/01/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 LOCATED ON THE CAMPUS OF THE TEXAS WOMAN''S UNIVERSITY IN DENTON, TEXAS, IT IS IN THE NORTHEAST SECTION OF DENTON IN FRONT AND SOUTH OF THE MAIN ENTRANCE TO THE OLD ADMINISTRATION BUILDING. THE BUILDING HAS NOT BEEN USED SINCE 1956. THE MARK IS 300 FEET WEST OF THE CENTER OF BELL STREET, 156 FEET SOUTHEAST OF THE SOUTHWEST CORNER OF THE BUILDING, 48 FEET NORTH OF A CONCRETE WATER MAIN CASING AND 25.5 FEET SOUTH OF A FLAGPOLE.
06/30/1995 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1995 RECOVERED IN GOOD CONDITION.
02/24/1998 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1998 MARK NOT FOUND.

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 determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (G = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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