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Details for Benchmark: EU0251

N 34° 53.483 W 114° 42.183 (NAD 83)

Altitude: 970.85

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

Location:
In SAN BERNARDINO county, CA View Original Datasheet
Designation:
968
Marker Type:
cap-and-bolt pair
Setting:
set into the top of a metal pipe driven into the ground
Stability:
Mark of questionable or unknown stability.

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Ce benchmark a été trouvé en équipe avec Buckfast : la team "Made in France" lors de notre périple sur la route E.T. Higway jusqu'à Tonopah, puis redescente sur Las Vegas.Puis jusqu'à Needles.
TFTB

Found with KayakBird.

[Photos:]
photoEU0251 968
photoEU0251 968 area

Recovered in good condition as described. Close to where I-40 crosses the railroad.

[Photos:]
photo968 near Needles in CA.
photo968 Looking at the I-40 RR overpass

Documented History (by the NGS)

Unknown by USGS (MONUMENTED)
01/01/1944 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1944 6.9 MI NW FROM NEEDLES. 6.9 MILES NORTHWEST ALONG THE ATCHISON, TOPEKA AND SANTA FE RAILWAY FROM THE STATION AT NEEDLES, SAN BERNARDINO COUNTY, AT THE ABANDONED TOWN OF JAVA, 124.5 FEET NORTH OF THE NORTH CORNER OF A LONG, LOW STUCCO BUNKHOUSE, 91.6 FEET SOUTH OF A VERTICAL RAIL MARKING MILEAGE 585, 47.3 FEET SOUTHEAST OF MILEPOST 585, 61 FEET SOUTHWEST OF THE SOUTHWEST RAIL, AND 43 FEET WEST OF THE WEST CORNER OF A CONCRETE CISTERN. A UNITED STATES GEOLOGICAL SURVEY STANDARD CAP, STAMPED 968 AND RIVETED ON THE TOP OF AN IRON PIPE PROJECTING ABOUT 10 INCHES ABOVE GROUND. NOTE-- THE LEVELING PARTY OF 1944 REPORTED THAT THE CENTER OF THE CAP WAS DENTED AND THE PIPE LEANING TO THE SOUTH. THE ROD WAS HELD ON THE HIGHEST POINT OF THE CAP, ITS NORTH EDGE.
01/01/1981 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1981 11.3 KM (7.0 MI) NORTHWEST ALONG THE ATCHISON, TOPEKA AND SANTA FE RAILROAD FROM THE STATION IN NEEDLES, 0.2 KM (0.1 MI) WEST OF INTERSTATE HIGHWAY 40 OVERPASS, 18.6 METERS (61 FT) SOUTHWEST OF THE SOUTHWEST RAIL, 14.3 METERS (47 FT) SOUTHEAST OF MILEPOST 585, 21.3 METERS (70 FT) NORTHEAST OF A CHAIN LINK FENCE. THE MARK IS 0.2 METERS SE FROM A WITNESS POST. THE MARK IS 0.6 M ABOVE THE RAILS.

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.
  • 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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