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Details for Benchmark: JJ0712

N 38° 04.729 W 102° 22.925 (NAD 83)

Altitude: 3510.57

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

Location:
In PROWERS county, CO View Original Datasheet
Designation:
LOW
Marker Type:
triangulation station 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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found

Found in good condition.

Recovered as described in good condition.

[Photos:]
photoJJ0712 LOW
photoJJ0712 EYE LEVEL
photoJJ0712 VIEW SOUTH

Triangulation Station LOW was recovered as described, in good condition.

[Photos:]
photoJJ0712 20060716 G (Prowers Co. CO)
Triangulation Station LOW w/GPSr.
photoJJ0712 20060716 C (Prowers Co. CO)
Triangulation Station LOW.
photoJJ0712 20060716 B (Prowers Co. CO)
Triangulation Station LOW from Eye Level.
photoJJ0712 20060716 A1 N (Prowers Co. CO)
North at Triangulation Station LOW.
photoJJ0712 20060716 A2 E (Prowers Co. CO)
East at Triangulation Station LOW.

Documented History (by the NGS)

01/01/1954 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1954 (WRH) THE STATION IS LOCATED ON THE ROAD RIGHT-OF-WAY AND IN THE POINT OF A TRIANGLE FORMED BY 2 PAVED ROADS. IT IS ABOUT 4 MILES AIRLINE WEST OF GRANADA, ABOUT 13 MILES AIRLINE EAST OF LAMAR, AND ABOUT 5 MILES AIRLINE SOUTHWEST OF BRISTOL. THE STATION IS A STANDARD DISK, STAMPED LOW 1954 AND SET IN THE TOP OF A 10-INCH SQUARE CONCRETE MONUMENT THAT PROJECTS 1 INCH. IT IS 60 FEET NORTH OF THE CENTERLINE OF U.S. HIGHWAY 50, 36 FEET SOUTH OF THE CENTERLINE OF A NARROW PAVED ROAD, 10 FEET NORTH OF A SOUTHEAST-NORTHWEST WIRE FENCE, 3 FEET NORTH OF A SIGN BOARD, AND 5-1/2 FEET EAST OF A WITNESS POST. REFERENCE MARK 1 IS A STANDARD DISK, STAMPED LOW NO 1 1954 AND SET IN THE TOP OF A 10-INCH SQUARE CONCRETE MONUMENT THAT PROJECTS 4 INCHES. IT IS 57 FEET NORTHEAST OF THE CENTERLINE OF U.S. HIGHWAY 50, 1 FOOT NORTHEAST OF THE WIRE FENCE, AND ABOUT THE SAME ELEVATION AS THE STATION. REFERENCE MARK 2 IS A STANDARD DISK, STAMPED LOW NO 2 1954 AND SET IN THE TOP OF A 10-INCH SQUARE CONCRETE MONUMENT THAT PROJECTS 4 INCHES. IT IS 44 FEET NORTHEAST OF THE CENTERLINE OF U.S. HIGHWAY 50, 40 FEET SOUTH OF THE CENTER LINE OF THE NARROW PAVED ROAD, 1 FOOT NORTHEAST OF A WIRE FENCE, AND ABOUT 1 FOOT HIGHER THAN THE STATION. REFERENCE MARK 3 IS A STANDARD DISK, STAMPED LOW NO 3 1954 AND SET IN THE TOP OF A 10-INCH SQUARE CONCRETE MONUMENT THAT IS FLUSH WITH THE GROUND. IT IS 33 FEET NORTH OF THE CENTER LINE OF THE NARROW ROAD, 45 FEET SOUTH OF THE CENTERLINE OF THE SANTA FE RAILROAD TRACKS, 1 FOOT NORTH OF A WIRE FENCE, AND ABOUT 1 FOOT HIGHER THAN THE STATION. THE AZIMUTH MARK IS A STANDARD DISK, STAMPED LOW 1954 AND SET IN THE TOP OF A 10-INCH SQUARE CONCRETE MONUMENT THAT PROJECTS 5 INCHES. IT IS 61 FEET NORTH OF THE CENTERLINE OF U.S. HIGHWAY 50, 48 FEET EAST OF A FARM DRIVEWAY, 45 FEET SOUTH OF THE CENTERLINE OF THE SANTA FE RAILROAD TRACKS, AND 2 FEET SOUTH OF A WIRE FENCE. TO REACH THE MARK FROM THE STATION GO WEST-NORTHWEST ON U.S. HIGHWAY 50 FOR 0.6 MILE TO THE MARK ON THE RIGHT. TO REACH THE STATION FROM THE POST OFFICE IN GRANADA GO WEST ON U.S. HIGHWAY 50 FOR 4.3 MILES TO A REVERSE Y-FORK ON THE RIGHT. TURN SHARP RIGHT, EAST, AND GO 0.05 MILE TO THE STATION ON THE RIGHT. HEIGHT OF LIGHT ABOVE STATION MARK 2 METERS.
01/01/1986 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1986 6.9 KM (4.3 MI) WEST FROM GRANADA. 6.9 KM (4.3 MI) WEST ALONG US HIGHWAY 50 FROM THE POST OFFICE AT GRANADA, AT A REVERSE FORK IN THE ROAD, 18.3 METERS (60 FT) NORTH OF THE HIGHWAY CENTERLINE, 11.0 METERS (36 FT) SOUTH OF THE CENTER OF A DIRT ROAD LEADING EAST (OLD HIGHWAY 50), 12.9 METERS (42.4 FT) WEST OF A POWER POLE AND 13.8 METERS (45.2 FT) EAST OF A POWER POLE. THE MARK IS 0.3 METERS S FROM A WITNESS POST THE MARK IS ABOVE LEVEL WITH THE ROAD.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1993.
  • 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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