Skip to content

Details for Benchmark: PA0352

N 43° 31.183 W 119° 12.833 (NAD 83)

Altitude: 4206.67

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

Location:
In HARNEY county, OR View Original Datasheet
Designation:
U 18
Marker Type:
pipe cap
Setting:
set into the top of a metal pipe driven into the ground
Stability:
Mark of questionable or unknown stability.

Must Read!

Benchmarks may be on private property or in dangerous locations. Obey local laws. By using the services on Geocaching.com you agree to this disclaimer.

Saw the WP this morning but didn't stop. The '18 string' is part of a long level run in 1920. This earlier USGS must have fit into the required interval.

This entry was edited by kayakbird on Thursday, 24 May 2012 at 15:30:32 UTC.

[Photos:]
photoPA0352 USGS 4195 H 1903
'4195 H' STRUCK OUT AND OVER-STAMPED ' U 18 4203' BY THE CGS IN 1920
photoPA0352 ESE

Recovered in good condition along Highway 20 about 12 miles south and west of the intersection of Highway 20 and Highway 78 in downtown Burns, opposite the driveway south to address #25542, where the road transitions from a straight run from the west to the start of a curve, 101 feet north of the centerline of the highway, 2.7 feet north of a barbed-wire fence paralleling the highway, 1.5 feet south of a wooden “USBM” witness post, 1.2 feet northwest of a metal witness post. The 3.75-inch diameter disk protrudes 6 inches above the ground on an iron pipe.

Our GPS (HH2) gave the coordinates for the mark as: N 43 31.204, W 119 12.855

Interesting Note:
In a 1920’s publication, we found a note about a “U 18” U.S.G.S. mark in this area that was part of the first-order level net. The U 18 mark described therein had a stamping of “4195 H” rather than the stamping of “4203” that is on this mark.
If you look closely at our disk close-up photo, you can see that it used to be stamped 4195 H and has been overstamped in an attempt to “erase” that designation.

[Photos:]
photoPA0352 – Disk - near Hines, Oregon
photoPA0352 - Eye level view.
Top of photo is roughly north.
photoPA0352 - Looking approximately north - wide.
Yellow arrow points to the metal witness post.

Documented History (by the NGS)

01/01/1903 by USGS (MONUMENTED)
DESCRIBED BY US GEOLOGICAL SURVEY 1903 12.3 MI W FROM BURNS. 12.3 MILES WEST ALONG THE CENTRAL OREGON HIGHWAY (U.S. 20) FROM BURNS, HARNEY COUNTY, OPPOSITE THE GATE TO THE JOE BUGMAN RANCHHOUSE, ABOUT 200 FEET WEST OF THE WEST END OF A CURVE, 93 FEET NORTH OF THE CENTERLINE OF THE HIGHWAY, AND NEAR A LARGE CLUMP OF SAGEBRUSH. A UNITED STATES GEOLOGICAL SURVEY STANDARD CAP, STAMPED 4203 U 18 H 1903 AND RIVETED ON THE TOP OF A 3-1/2-INCH IRON PIPE ENCASED IN CONCRETE.
01/01/1939 by ORDT (GOOD)
RECOVERY NOTE BY OREGON DEPARTMENT OF TRANSPORTATION 1939 RECOVERED IN GOOD CONDITION.

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.

Advertising with Us