Details for Benchmark: QE0920
N 44° 02.667 W 123° 01.050 (NAD 83)
Coordinates may not be exact. Altitude is ADJUSTED and location is SCALED. (more info)
- In LANE county, OR View Original Datasheet
- W 94
- Marker Type:
- bench mark disk
- set into the top of a round concrete monument
- May hold, but of type commonly subject to surface motion.
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Documented History (by the NGS)
|01/01/1934 by CGS (MONUMENTED)
|01/01/1943 by NGS (GOOD)
|DESCRIBED BY NATIONAL GEODETIC SURVEY 1943
IN SPRINGFIELD. ALONG THE SOUTHERN PACIFIC RAILROAD, AT SPRINGFIELD, 135.5 FEET WEST OF THE SOUTHWEST CORNER OF THE RAILROAD STATION, APPROXIMATELY 200 FEET NORTHWEST OF AND ACROSS THE TRACKS FROM THE NORTHWEST CORNER OF THE BRICK BUILDING OF THE MOUNTAIN STATES POWER COMPANY, 38.5 FEET NORTH OF THE NORTH RAIL OF THE MAIN TRACK, 16.1 FEET SOUTH OF THE SOUTH RAIL OF A SIDE TRACK LEADING AROUND THE NORTH SIDE OF THE STATION, 3.4 FEET WEST OF THE SECOND TELEGRAPH POLE WEST OF THE STATION, A BENCH MARK DISK SET IN THE TOP OF A CONCRETE POST PROJECTING 3 INCHES ABOVE THE GROUND.
|01/01/1987 by NGS (GOOD)
|RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1987
RECOVERED IN GOOD CONDITION, A NEW DESCRIPTION FOLLOWS. IN SPRINGFIELD, AT THE INTERSECTION OF SOUTH 5TH STREET AND THE SOUTHERN PACIFIC RAILROAD, 168.1 M (551.5 FT) EAST OF THE CENTERLINE OF THE STREET, 41.3 M (135.5 FT) WEST OF THE SOUTHWEST CORNER OF THE RAILROAD STATION, 6.2 M (20.3 FT) NORTH OF THE NEAR RAIL OF THE MAIN TRACK, 4.7 M (15.4 FT) SOUTH OF THE NEAR RAIL OF A SPUR TRACK, AND 0.7 M (2.3 FT) WEST OF A UTILITY POLE. THE MARK IS 0.3 METERS N FROM A WITNESS POST THE MARK IS 0.1 M BELOW THE TRACKS.
|01/01/1989 by USPSQD (GOOD)
|RECOVERY NOTE BY US POWER SQUADRON 1989 (SEM)
RECOVERED IN GOOD CONDITION.
- 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.