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Details for Benchmark: RD3078

N 45° 37.231 W 122° 40.154 (NAD 83)

Altitude: 30

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

Location:
In CLARK county, WA View Original Datasheet
Designation:
ORT
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:

Reference Points

Must Read!

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The benchmark that other people are finding isn't this one. It's in the wrong location, above ground (when it should be underground), and has a date stamp of 1993. This benchmark has a date stamp of 1920 or 1926.

If this benchmark still exists, it's buried under the sidewalk or driveway (or plants).

This station has been considered lost. There is a U.S. Department of Interior Bureau of Land Management benchmark northeast of a restaurant however it is NOT the RD3078 ORT NGS benchmark. The description of the NGS Benchmark is a large bronze disk set in the top of an iron pipe. The top of the disk is 1 1/2 feet below the surface of the paved surface set in a 8 x 8 inch well with a metal cover. The mark is stamped ORT 1920 or 1926, the last number being blurred. The BLM benchmark is considerably above ground. I was able to photograph the Witness Tree benchmark which is below the surface level under a metal cover (see geocache: The Witness Tree).

[This entry was edited by Rose Red on Tuesday, August 09, 2005 at 8:30:51 AM.]

[Photos:]
photounknown benchmark (no PID)
This is not the benchmark.

Didnt read the directions thouroughly missed it. Went for a walk down the sidewalk. then saw it on the return to the truck.

[Photos:]
photoGetting Dark
photofrom the side walk

Saw this in a flower bed at the park, just East of Who Song and Larry's. It is between the furthest East Parking lot and the parking lot just west of it. It can be easily seen on the South side of the main pedestrian sidewalk that is on the South side of SE Columbia way.

[Photos:]
photoClose up
photodistance from south edge of sidewalk

Documented History (by the NGS)

01/01/1935 by USE (MONUMENTED)
DESCRIBED BY US ENGINEERS 1935 (WMS) ON THE N BANK OF THE COLUMBIA RIVER, 300 METERS ABOVE INTERSTATE BRIDGE, 50 METERS FROM ORDINARY HIGH-WATER LINE, ABOUT 20 METERS N OF EDGE OF BANK 40 METERS S OF RAILROAD TRACK AND 118 METERS SE OF A RAILROAD UNDERPASS OR CATTLE CROSSING. STATION IS MARKED BY A 1 1/2-INCH IRON PIPE IN CEMENT. (NOT IN 1938 SCHEME OF U.S.C. AND G.S.).
01/01/1945 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1945 (RAE) A SEARCH WAS MADE FOR THIS STATION BUT IT COULD NOT BE FOUND. THE AREA IN WHICH THIS STATION WAS LOCATED HAS BEEN CONVERTED INTO A COAST GUARD BASE. A NEW ROAD HAS BEEN BUILT THROUGH THIS PROPERTY AND THE MARK MAY HAVE BEEN DESTROYED DURING CONSTRUCTION. IT IS RECOMMENDED THAT THE STATION BE CONSIDERED LOST.
01/01/1961 by CGS (MONUMENTED)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1961 (FN) STATION WAS RECOVERED AND FOUND IN GOOD CONDITION. REACHED FROM THE NORTH END OF THE INTERSTATE BRIDGE AT VANCOUVER, WASHINGTON, GO EAST ON THE PAVED STREET BETWEEN THE SPOKANE, PORTLAND AND SEATTLE RAILROAD TRACKS AND THE COLUMBIA RIVER FOR 0.2 MILE TO THE ENTRANCE TO THE U.S. COAST GUARD STATION ON THE RIGHT, SOUTH. STATION MARK IS 188 FEET EAST OF THE EAST END OF THE LARGE ENTRANCE GATE, 15.5 FEET SOUTH OF THE FENCE, 53.5 FEET EAST NORTHEAST OF THE NORTHEAST CORNER OF A PAINT HOUSE, ABOUT 120 FEET NORTH OF THE TOP OF THE NORTH BANK OF THE COLUMBIA RIVER. STATION MARK IS A LARGE BRONZE DISK SET IN THE TOP OF AN IRON PIPE. TOP OF DISK IS 1.6 FEET BELOW THE SURFACE OF THE PAVED YARD SET IN AN 8 IN X 8 IN WELL WITH A METAL COVER. MARK IS STAMPED ORT 1920 OR 1926, THE LAST NUMBER BEING BLURRED.
01/01/1985 by USPSQD (MARK NOT FOUND)
RECOVERY NOTE BY US POWER SQUADRON 1985 (TCO) COAST GUARD STATION HAS BEEN GONE FOR SEVERAL YEARS AND TWO NEW RESTAURANTS AND LANDSCAPED PARKING HAS BEEN BUILT AT THIS LOCATION. STATION WAS SEARCHED FOR QUITE THOROUGHLY BUT COULD NOT BE FOUND. RECOMMEND THIS STATION BE CONSIDERED LOST.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in December 1991.
  • The orthometric height was scaled from a topographic map.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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