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Details for Benchmark: JJ0211

N 38° 26.418 W 102° 43.845 (NAD 83)

Altitude: 4146.46

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

Location:
In KIOWA county, CO View Original Datasheet
Designation:
N 37
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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Bench Mark N 37 was recovered as described, in good condition. This mark is located at Milepost 108.2 of U.S. Highway 287, and is in the northwest angle of the intersection of U.S. 287 and Kiowa County Road N.

[Photos:]
photoJJ0211 20060716 G (Kiowa Co. CO)
Bench Mark N 37 w/GPSr.
photoJJ0211 20060716 C (Kiowa Co. CO)
Bench Mark N 37.
photoJJ0211 20060716 B (Kiowa Co. CO)
Bench Mark N 37 from Eye Level.
photoJJ0211 20060716 A1 N (Kiowa Co. CO)
North at Bench Mark N 37.
photoJJ0211 20060716 A2 W (Kiowa Co. CO)
West at Bench Mark N 37.

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1933 (WRH) THE STATION IS LOCATED AIRLINE, ABOUT 4-1/2 MILES SOUTHEAST OF EADS AND ABOUT 10 MILES WEST OF CHEVINGTON ALONG THE WEST SIDE OF U.S. HIGHWAY 287. THE STATION IS A STANDARD U.S.C. AND G.S. BENCH MARK DISK STAMPED N37 1933 SET IN TOP OF A 12-INCH SQUARE CONCRETE MONUMENT WHICH PROJECTS ABOUT 4 INCHES ABOVE THE GROUND. IT IS 69 FEET WEST OF THE CENTER LINE OF THE HIGHWAY, 24 FEET NORTH OF THE CENTER LINE OF A DIRT ROAD AND 7 FEET WEST OF A WHITE WITNESS POST. REFERENCE MARK NUMBER ONE IS A STANDARD DISK STAMPED BM N37 NO 1 1954 SET IN TOP OF A 10-INCH SQUARE CONCRETE MONUMENT WHICH PROJECTS ABOUT 3 INCHES ABOVE THE GROUND AND IS ABOUT THE SAME ELEVATION AS THE STATION. IT IS 6 INCHES WEST OF A NORTH-SOUTH FENCE LINE AND 33 FEET WEST OF THE CENTER LINE OF THE HIGHWAY. REFERENCE MARK NUMBER TWO IS A STANDARD DISK STAMPED BM N37 NO 2 1954 SET IN TOP OF A 10-INCH SQUARE CONCRETE MONUMENT WHICH PROJECTS ABOUT 2 INCHES ABOVE THE GROUND AND IS ABOUT THE SAME ELEVATION AS THE STATION. IT IS 4 FEET NORTH OF AN EAST-WEST FENCE LINE AND 24 FEET NORTH OF THE CENTER LINE OF A DIRT ROAD. THE AZIMUTH MARK IS A STANDARD DISK STAMPED BM N37 1954 SET IN TOP OF A 10-INCH SQUARE CONCRETE MONUMENT WHICH PROJECTS ABOUT 5 INCHES ABOVE THE GROUND. IT IS 48 FEET EAST OF THE CENTER LINE OF THE HIGHWAY AND IS 1 FOOT WEST OF A NORTH-SOUTH FENCE LINE. TO REACH THE AZIMUTH MARK FROM THE STATION, GO SOUTH ON U.S. HIGHWAY 287 FOR 0.3 MILE TO THE AZIMUTH MARK ON THE LEFT, EAST SIDE. TO REACH THE STATION FROM THE JUNCTION OF U.S. HIGHWAY 287 AND STATE HIGHWAY 96 IN EADS, GO EAST ON U.S. HIGHWAY 287 AND STATE HIGHWAY 96 FOR 2.7 MILES TO A JUNCTION. TURN SOUTH AND FOLLOW U.S. HIGHWAY 287 FOR 4.3 MILES TO A CROSS ROAD, A WHITE WITNESS POST AND THE STATION ON THE RIGHT, WEST SIDE.
01/01/1967 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1967 5 MI SW FROM EADS. 5.0 MILES WEST AND SOUTH FROM THE MISSOURI PACIFIC RR STATION AT EADS ALONG U.S. HIGHWAY 287, AT THE INTERSECTION OF A GRADED ROAD, 70 FEET WEST OF CENTERLINE OF HIGHWAY, 30 FEET NORTH OF CENTERLINE ROAD, 20 FEET WEST OF POWERPOLE, 18 FEET WEST OF R.O.W. FENCE CORNER, 2 FEET SOUTH OF FENCE, 1 FOOT SOUTH OF STEEL WITNESS POST. A STANDARD TABLET STAMPED N 37 1933 AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.3 FOOT.
01/01/1978 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1978 (CLN) STATION RECOVERED AND ALL MARKS ARE IN GOOD CONDITION. DISTANCE AND DIRECTION TO REFERENCE MARK NUMBER 2 CHECKED ADEQUATELY. DIRECTION TO REFERENCE MARK NUMBER 1 ALSO CHECKED ADEQUATELY BUT THE DISTANCE TO THE MARK DID NOT COMPARE WITH PREVIOUS DATA BY 0.016 METERS. LOCATION OF STATION IS STILL ADEQUATE BUT A DISCREPTANCY IN MILEAGE IN ROUTE TO STATION WAS NOTED. STATION IS REACHED FROM THE POST OFFICE IN EADS. GO SOUTH ON MAINE STREET FOR 0.2 MILE TO JUNCTION WITH U.S. HIGHWAY 287 AND STATE HIGHWAY 96. TURN LEFT AND GO EAST ON THE HIGHWAY FOR 2.7 MILES TO THE EAST JUNCTION OF THE TWO HIGHWAYS. TURN RIGHT AND GO SOUTH ON HIGHWAY 287 FOR 2.25 MILES TO A CROSS ROAD AND STATION ON RIGHT, AS DESCRIBED. CONTINUE SOUTH ON HIGHWAY 287 FOR 0.3 MILE TO THE AZIMUTH MARK ON THE LEFT, AS DESCRIBED. STATION IS A STANDARD BENCH MARK DISK, STAMPED---N 37 1933---SET IN TOP OF A SQUARE CONCRETE MONUMENT PROJECTING 9 INCHES, 59 FEET WEST OF CENTER OF U.S. HIGHWAY 287, 28 FEET NORTH OF CENTER OF AN EAST-WEST GRAVELED ROAD, 21 FEET WEST OF A FENCE CORNER POST, 3 FEET SOUTH OF AN EAST-WEST FENCE LINE, 1.8 FEET NORTHEAST OF A METAL WITNESS POST, 1.6 FEET SOUTH-SOUTHEAST OF A METAL WITNESS POST. REFERENCE MARK 1 IS A STANDARD DISK, STAMPED---BM N 37 NO 1 1954--- SET IN TOP OF A SQUARE CONCRETE MONUMENT PROJECTING 1 INCH, 51 FEET WEST OF CENTER OF THE HIGHWAY, 1 FOOT WEST OF A NORTH-SOUTH FENCE. REFERENCE MARK 2 IS A STANDARD DISK, STAMPED---BM N 37 NO 2 1954--- SET IN TOP OF A SQUARE CONCRETE MONUMENT PROJECTING 2 INCHES, 34 FEET NORTH OF CENTER OF THE GRAVELED ROAD, 4 FEET NORTH OF EAST-WEST FENCE. AZIMUTH MARK IS A STANDARD DISK, STAMPED---BM N 37 1954---SET IN TOP OF A SQUARE CONCRETE MONUMENT PROJECTING 1 INCH, 46 FEET EAST OF CENTER OF HIGHWAY 287, 10 FEET WEST OF WEST EDGE OF A CULTIVATED FIELD, 2.3 FEET NORTH OF A METAL WITNESS POST.
04/13/1991 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1991 STATION IS LOCATED ABOUT 6.5 KM (4.0 MI) SOUTHEAST OF EADS, 3.5 KM (2.2 MI) SOUTH OF THE JUNCTION OF US HIGHWAY 287 AND STATE HIGHWAY 96, ALONG HIGHWAY 287, IN THE NORTHWEST ANGLE OF A CROSSROAD, ON COUNTY RIGHT-OF-WAY, IN THE SOUTHEAST CORNER OF SECTION 36, T 18 S, R 48 W. OWNERSHIP--KIOWA COUNTY. TO REACH FROM THE JUNCTION OF US HIGHWAY 287 AND STATE HIGHWAY 96 IN EADS, GO EAST ON HIGHWAYS 287 AND 96 FOR 4.72 KM (2.93 MI) TO A CURVE RIGHT AND HIGHWAY 96 LEADING EAST. CONTINUE SOUTH ON HIGHWAY 287 FOR 3.59 KM (2.23 MI) TO A DIRT CROSSROAD AND THE STATION ON THE RIGHT. STATION MARK IS SET IN THE TOP OF A 30-CM SQUARE CONCRETE POST PROJECTING 15 CM. IT IS 20.9 M (68.6 FT) WEST OF THE HIGHWAY CENTER, 9.0 M (29.5 FT) NORTH OF, AND LEVEL WITH THE ROAD CENTER, 0.6 M (2.0 FT) NORTHEAST OF A METAL WITNESS POST, 0.6 M (2.0 FT) SOUTH OF A FIBERGLASS WITNESS POST AND 0.8 M (2.6 FT) SOUTH OF A WIRE FENCE. DESCRIBED BY G.R.HEID
03/29/1996 by CODOT (GOOD)
RECOVERY NOTE BY COLORADO DEPARTMENT OF TRANSPORTATION 1996 (JRZ) RECOVERED AS DESCRIBED. NEAR S.H. 287 MILEPOST 108.3. TO REACH FROM EADS, GO EAST ON HIGHWAY 287 4.72 KM (2.93 MI) TO A CURVE RIGHT. CONTINUE SOUTH ON HIGHWAY 287 FOR 3.59 KM (2.23 MI) TO A DIRT CROSSROAD AND THE STATION ON THE RIGHT. STATION MARK IS SET IN THE TOP OF A 30 CM SQUARE CONCRETE POST PROJECTING 10 CM FROM THE SURFACE . STATION WAS RECOVERED IN GOOD CONDITION IN MARCH 1996.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in May 1992.
  • 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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