Skip to Content

Details for Benchmark: QE1623

N 44° 00.050 W 123° 00.917 (NAD 83)

Altitude: 517.66

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

Location:
In LANE county, OR View Original Datasheet
Designation:
J 737
Marker Type:
bench mark disk
Setting:
abutments and piers of large bridges
Stability:
Most reliable and expected to hold position/elevation well.

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.

Destroyed by new bridge

The old bridge has been demolished and replaced; the mark was not saved.
Thanks, Fort Rectus

Found as described

[Photos:]
photoThe Mark looking north
photoJ 737 1987
photoW/GPSr
photoLooking West
photolooking South
photoAnother View North

Documented History (by the NGS)

01/01/1987 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1987 6.1 KM (3.80 MI) SOUTH FROM GLENWOOD. 6.1 KM (3.80 MI) SOUTHERLY ALONG INTERSTATE HIGHWAY 5 FROM THE JUNCTION OF FRANKLIN BOULEVARD IN GLENWOOD, SET VERTICALLY IN THE SOUTH FACE OF THE MOST SOUTHERLY 1 OF 13 COLUMNS OF THE FIRST PIER NORTHWEST OF THE SOUTHEAST CONCRETE ABUTMENT OF A HIGHWAY OVERPASS OF STATE HIGHWAY 99 (EXIT 188 B), 20.8 M (68.2 FT) SOUTH OF THE CENTER OF THE INTERSTATE HIGHWAY, AND 5.1 M (16.7 FT) EAST OF THE CENTERLINE OF THE STATE HIGHWAY. THE MARK IS 1.4 M ABOVE THE GROUND.

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

Return to the Top of the Page