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Details for Benchmark: JJ0224

N 38° 05.350 W 102° 36.983 (NAD 83)

Altitude: 3617.33

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

Location:
In PROWERS county, CO View Original Datasheet
Designation:
B 38
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.

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During a stop at the nearby Visitor Information Center, I hoofed it over to the benchmark and found the benchmark as described in good condition.

[Photos:]
photoJJ0224_20140808_095840
photoJJ0224_area_20140808_095844

recovered this benchmark successfully

[Photos:]
photoJJ0224

Benchmark in good shape

[Photos:]
photoJJ0224
photoJJ0224 w/ GPS

Found as described in good condition.

[Photos:]
photoJJ0224 B 38
photoJJ0224 EYE LEVEL
photoJJ0224 VIEW WEST
N 38° 05.367 W 102° 36.990

Bench Mark B 38 was recovered as described, in good condition.

[Photos:]
photoJJ0224 20060716 G (Prowers Co. CO)
Bench Mark B 38 w/GPSr.
photoJJ0224 20060716 C (Prowers Co. CO)
Bench Mark B 38.
photoJJ0224 20060716 B (Prowers Co. CO)
Bench Mark B 38 from Eye Level.
photoJJ0224 20060716 A1 S (Prowers Co. CO)
South at Bench Mark B 38.
photoJJ0224 20060716 A2 W (Prowers Co. CO)
West at Bench Mark B 38.
N 38° 05.369 W 102° 36.987

WAS OFF 118FT. ALTITUDE WAS 3623

[Photos:]
photoBENCHMARK

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
01/01/1943 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1943 AT LAMAR. AT LAMAR, PROWERS COUNTY, ON THE ATCHISON, TOPEKA AND SANTA FE RAILWAY, 161 FEET SOUTH OF THE CENTERLINE OF THE SOUTH SIDETRACK, NEAR THE INTERSECTION OF THIRD AND BEECH STREETS, 54 FEET NORTH OF THE SOUTH CURB OF BEECH STREET, AND 40 FEET EAST OF THE CENTERLINE OF THIRD STREET. A STANDARD DISK, STAMPED 3615.547 B 38 1933 AND SET IN THE TOP OF A CONCRETE POST.
01/01/1968 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1968 RECOVERED IN GOOD CONDITION.
01/01/1985 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1985 RECOVERED IN GOOD CONDITION. A NEW DESCRIPTION FOLLOWS. IN LAMAR, AT THE INTERSECTION OF THIRD AND BEECH STREETS, IN THE SOUTHWEST CORNER OF A VACANT LOT, 11.6 M (38.1 FT) EAST OF THE CENTER OF THIRD STREET, 8.5 M (27.9 FT) NORTH OF THE CENTER OF BEECH STREET, 4.9 M (16.1 FT) SOUTH OF A 36-INCH ELM TREE, AND 3.4 M (11.2 FT) EAST OF A UTILITY POLE. THE MARK IS 0.3 METERS S FROM A WITNESS POST THE MARK IS 0.5 M ABOVE THE STREETS.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991. WARNING-Repeat measurements at this control monument indicate possible vertical movement.
  • 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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