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Details for Benchmark: HJ0220

N 37° 58.780 W 103° 34.863 (NAD 83)

Altitude: 4196.62

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

Location:
In OTERO county, CO View Original Datasheet
Designation:
LA JUNTA
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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Recovered in good condition as described.

[Photos:]
photoHJ0220 LA JUNTA
photoHJ0220 area view

Documented History (by the NGS)

01/01/1952 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1952 (LGT) THE STATION IS LOCATED ABOUT 2 MILES WEST OF LA JUNTA ON A SMALL RIDGE AT THE NORTH EDGE OF A SHALLOW GRAVEL PIT. TO REACH THE STATION FROM LA JUNTA, GO WESTERLY ON STATE HIGHWAY 10 FOR 0.7 MILES TO THE AZIMUTH MARK ON THE LEFT. CONTINUE WEST ON HIGHWAY 0.7 MILE TO A CROSSROADS. TURN LEFT, GO SOUTH 0.2 MILE TO A GATE ON THE LEFT. TURN LEFT, PASS THROUGH GATE AND GO EAST TO THE TOP OF THE RIDGE AND STATION. THE STATION MARK IS STAMPED LA JUNTA 1952. IT IS A STANDARD DISK SET IN A CONCRETE MONUMENT THAT PROJECTS 3 INCHES AND IS 4 FEET NORTHEAST OF A WHITE WITNESS POST. REFERENCE MARK 1 IS STAMPED LA JUNTA NO 1 1952. IT IS A STANDARD DISK SET IN A CONCRETE MONUMENT THAT PROJECTS 8 INCHES AND IS ABOUT 5.5 FEET LOWER THAN THE STATION MARK. REFERENCE MARK 2 IS STAMPED LA JUNTA NO 2 1952. IT IS A STANDARD DISK SET IN A CONCRETE MONUMENT THAT PROJECTS 8 INCHES AND IS ABOUT THE SAME ELEVATION AS THE STATION MARK. THE AZIMUTH MARK IS STAMPED LA JUNTA 1952. IT IS A STANDARD DISK SET IN A CONCRETE MONUMENT THAT PROJECTS 2 INCHES, IS 27 FEET SOUTH OF THE CENTERLINE OF STATE HIGHWAY 10 AND 3 FEET WEST OF A TELEPHONE POLE AND A WHITE WITNESS POST.
01/01/1960 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1960 STATION AND REFERENCE MARKS FOUND IN GOOD CONDITION.
01/01/1977 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 (CLN) STATION RECOVERED AND ALL MARKS ARE IN GOOD CONDITION. DISTANCE AND DIRECTION TO THE REFERENCE MARKS CHECKED FAIRLY WELL. THE LINE TO THE AZIMUTH MARK IS BLOCKED AT THIS TIME BY SEVERAL HAY STACKS BUT WILL BE VISIBLE WHEN HAY IS REMOVED. THE HORIZONTAL ANGLE BETWEEN THE LAJUNTA WATER TANKS ALSO CHECKED FAIRLY WELL. A SLENDER MAST BELONGING TO THE SOUTHEAST COLORADO POWER COMPANY HAS BEEN ERECTED ABOUT 250 FEET SOUTH OF THE STATION MARK. IT WAS NOT MEASURED TO DUE TO A BUILDING ON LINE. STATION IS REACHED FROM THE JUNCTION OF U.S. HIGHWAY 50 AND STATE HIGHWAY 10 WHICH IS AT THE WEST EDGE OF LAJUNTA. GO SOUTH AND WEST ON 10 FOR 0.75 MILE TO A SURFACED CROSSOVER ROAD AND STOP SIGNON LEFT. (TURN LEFT FOR ABOUT 100 FEET, THENCE LEFT AGAIN AND CONTINUE ON A SURFACED ROAD, EAST FOR 0.1 MILE, TOP OF RISE, GRAVELED ROAD, TELEPHONE LINE POLE, AN UNDERGROUND CABLE SIGN AND AZIMUTH MARK ON THE RIGHT). CONTINUE WEST ON HIGHWAY 10 FOR 0.6 MILE TO A CROSSROAD. TURN LEFT AND GO SOUTH ON A GRADED ROAD FOR 0.2 MILE TO TWO (2) ROADS ON LEFT (ONE LEADS TO A MAST). TURN LEFT AND GO NORTHEAST AND EAST ON THE NORTH 1 OF 2 ROADS ALONG THE WEST AND NORTH EDGE OF HILL FOR 0.1 MILE TO STATION ON RIGHT, AS DESCRIBED. STATION IS A STANDARD STATION MARK DISK, STAMPED LA JUNTA 1952, SET IN THE TOP OF A SQUARE CONCRETE MONUMENT PROJECTING ABOUT 3 INCHES. MARK IS 2 FEET NORTH-NORTHWEST OF A WOOD WITNESS POST, 1.7 FEET EAST OF A METAL WITNESS POST AND 152 FEET SOUTH OF A TRACK ROAD. REFERENCE MARK 1 IS A STANDARD REFERENCE MARK DISK, STAMPED LA JUNTA NO 1 1952, SET IN THE TOP OF A SQUARE CONCRETE MONUMENT PROJECTING ABOUT 3 INCHES. MARK IS 46 FEET SOUTH OF A TRACK ROAD AND 1.5 FEET EAST OF A METAL WITNESS POST. REFERENCE MARK 2 IS A STANDARD REFERENCE MARK DISK, STAMPED LA JUNTA NO 2 1952, SET IN THE TOP OF A SQUARE CONCRETE MONUMENT PROJECTING ABOUT 6 INCHES. MARK IS 1.3 FEET NORTH OF A METAL WITNESS POST. AZIMUTH MARK IS A STANDARD AZIMUTH MARK DISK, STAMPED LA JUNTA 1952, SET IN THE TOP OF A SQUARE CONCRETE MONUMENT FLUSH WITH THE GROUND. MARK IS 27 FEET SOUTH OF THE CENTER OF A SURFACED ROAD, 17 FEET WEST OF A GRAVELED ROAD, 2.5 FEET WEST OF A TELEPHONE LINE POLE AND 1 FOOT EAST OF AN UNDERGROUND TELEPHONE CABLE SIGN ON METAL POST. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--2 MILES WEST OF LAJUNTA.
01/01/1985 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1985 5.6 KM (3.5 MI) SW FROM LA JUNTA. 3.7 KM (2.3 MI) WESTERLY ALONG THE SANTA FE RAILROAD FROM THE STATION IN LA JUNTA, THENCE 1.9 KM (1.2 MI) SOUTH ALONG A PAVED ROAD, ALONG THE SOUTH EDGE OF A GRAVEL PIT, 0.3 KM (0.2 MI) SOUTH OF THE INTERSECTION OF STATE HIGHWAY 10, 186.0 M (610.2 FT) EAST OF THE CENTER OF THE ROAD, AND 76.5 M (251.0 FT) SOUTH OF A RADIO TOWER. THE MARK IS 1.2 METERS SW FROM A WITNESS POST THE MARK IS 3.0 M ABOVE THE ROAD.
05/28/1986 by (GOOD)
RECOVERED 1986 RECOVERED IN GOOD CONDITION.
07/21/1986 by (GOOD)
RECOVERED 1986 RECOVERED IN GOOD CONDITION.
01/05/1995 by CODOT (GOOD)
RECOVERY NOTE BY COLORADO DEPARTMENT OF TRANSPORTATION 1995 (MEL) RECOVERED AS DESCRIBED.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in January 1997.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • 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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