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Details for Benchmark: RD0449

N 45° 30.833 W 122° 40.383 (NAD 83)

Altitude: 34.24

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

Location:
In MULTNOMAH county, OR View Original Datasheet
Designation:
MAR RM 1
Marker Type:
reference mark disk
Setting:
massive retaining walls
Stability:
Probably hold position/elevation well.

Must Read!

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Still in good shape...

[Photos:]
photoRD0449
RD0449

Spotted this benchmark near a geocache we were hunting during a recent trip to Portland.

Looking for a geocache and we find this.

This is the first benchmark I'm logging, but I have seen a few others already. I just had no idea it would be nice to log them!

I am in Port land for a conference and have managed to arrive two days early to visit the town and of course the orginal geocache.
But I also try to find some caches in Port land itself. The weather is really great compared to all the wind and rain we had at home in The Netherlands the week or so before I left.
I had a long day at the conference yesterday from 8 am to 9 pm, but this morning I could go around again a little to search for and find a few caches.
I need to write long stories to get that souvenir or batch (I don't know yet because I have not reached the target yet!) for logging on average at least one hundred words. So I'm also putting in a couple of redundant spaces every once in a while, for which I apologise.

Found while geocaching with my son

Out with Papa-Penguin hunting benchmarks. All photos are in his logs.

Out skateboarding around town with Penguin Tracker finding benchmarks. We found more than can be logged on geocaching.com.

[Photos:]
photoLocation
photoRD0449

Visited after finding a nearby cache.

[Photos:]
photoRD0449 MAR RM 1
Off the walkway to the left of the Hawthorne Bridge

Out doing a wherigo for the 5th time and it's still not there but I was looking for benchmarks and this was one

Out with glorieme on this gorgeous day, hunting benchmarks and a few caches. Found KET RM 1 & 2, MAR RM 1 & 2, and a few others, some loggable, some not.

[Photos:]
photoRD0449_MAR_RM1

Out with Sally Tomato this wonderful sunny Portland day! We had to come back and get two nearby benchmarks (KET 1 and KET 2) since we missed them last week, and then - we just could not help ourselves - we had to keep going and find more.

I was going to get a different Benchmark for my 100th, but I'm hooked and I could not stop hunting today at Number 99 - so this one is my 100th benchmark find! Yahoo!

[Photos:]
photoRD0449: Portland Waterfront - my 100th benchmark

Benchmark hunting downtown

[Photos:]
photoimage_2
N 45° 30.846 W 122° 40.390

Downtown on bikes with RX Budd getting Benchmarks and caches. Another one off the list!

Out on a bike ride. Found the one on the other side of the hawthorne bridge months before. Realized today while hunting benchmark there was one on the north side along the bike/walking path also!

Found with Papa EGTH.

Always post photos of benchmarks with your logs. How else do you prove you found them?

[Photos:]
photothe disk
photothe setting

On the way to the Marriott with HockeyHiker19 and we spied these benchmarks.

[Photos:]
photoRD0449
photoBoth benchmarks in same area

Found during a lunch time walk:
http://www.ngs.noaa.gov/cgi-bin/get_image.prl?PROCESSING=get_figure&IID=63206

Found with FredFredsen during our vacation-visit-geocaching-tour in Washington State and Oregon.

Fast found on our vacationtour for Rotfi and me. The plaque is in good conditions. THX for this!

Greetings from Germany

:0) TFTC :0)


"Auch Du kannst ein Fred sein!"
(Fred ist in vorliegendem Fall als generes Maskulinum anzunehmen!)


"Prolet ist ja ein guter Begriff, bezeichnet das arbeitende Volk.
Heute ist das ein Schimpfwort für jemanden, der zehn Bier ext und ´ner
Oma hinten in den Kragen kotzt." (Helge Schneider)


"Sag mir eins, Dude. Musst du eigentlich immer so viel fluchen?
Was’n das für ’ne bekackte Frage?" (The Big Lebowski )

[Photos:]
photoBM - RD0449

Found a while ago, only now submitting photo

[Photos:]
photoMAR RM 1

Wasn't looking for this, but spotted it by chance on my way back from finding a cache.

Saw this one while walking the boardwalk on the gorgeous Saturday afternoon

First of 4 finds for the afternoon

[Photos:]
photoMAR RM 1 Reference Mark Disk
photoLocation of MAR RM 1 Reference Mark Disk

Found it good condition.

[Photos:]
photoRD0449

Found in good condition, funny I wouldn't just stumble on these things, I had to go looking for it.

[Photos:]
photoReference Mark MAR no 1
photoBenchmark location

Recovered in good condition per the 1975 description; with two exceptions:
- The mark is 31.5 feet north-northeast of the center of the cast iron bollard labeled “42”.

  • The triangulation station is gone or covered by concrete.

Note that the galvanized metal cross railing section above the disk has a removable portion that has a padlock on the top cross rail and 2 short vertical supports under the bottom cross rail. This differentiates it from some of the other metal railing sections that span between the concrete posts.

We did not verify the 100 foot dimension mentioned in the 1975 description. However, the mark is northwest of the bridge along the seawall.

[Photos:]
photoRD0449 - Disk – Portland, Oregon
photoRD0449 - Eye level view.
Looking approximately north-northeast. (The bridge in the distance at the top of the photo is the Morrison Bridge.)
photoRD0449 - Looking east-southeast.
We placed an orange marker on top of the disk. The bridge is the Hawthorne Bridge.

My second benchmark. Found on a very wet day while walking to the Max station to head to the airport.

Found as described while in town for the weekend

[Photos:]
photoRD0449

Took a walk around the Esplanade to find benchmarks today, 12 in all.

MAR RM 1 was an easy find near MAR RM 2.

Quick find this afternoon while out walking along the river. The benchmark is in good condition.

blues and bench mark whoo hoo

Found this by accident while getting out of the sun at the Blues Festival!

Found as described with RD0448 on a very busy morning on the river walkway. The bollard is stenciled #42 and a nearby concrete structure of the fence in #379. See RD0448 for photos.

Nicely polished by the shoes of visitors to the area. Found it and MAR NO 2 a few feet away.

[Photos:]
photoMAR RM 1

Found MAR NO. 1 and MAR NO.2 at this Lat/Long. There was a lot of GPS signal bounce near the Hawthorne bridge. MAR NO. 2 is about 6 feet SSE of MAR NO. 1.

[last edit: 5/11/2003 6:47:37 PM PST]

[last edit: 5/11/2003 6:53:32 PM PST]

[Photos:]
photoMAR NO. 1
photoMAR NO. 2

Documented History (by the NGS)

01/01/1938 by CGS (MONUMENTED)
01/01/1975 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1975 IN PORTLAND. IN SOUTHWEST PORTLAND BETWEEN SOUTHWEST FRONT AVENUE, AND THE WILLAMETTE RIVER, 100 FEET NORTH OF THE WEST END OF THE HAWTHORNE BRIDGE, 34 FEET NORTH OF A CAST-IRON BOLLARD, 5.97 FEET NORTHEAST OF TRIANGULATION STATION MAR 1938, AND 0.5 FOOT WEST OF THE PARAPET, CEMENTED FLUSH IN THE CONCRETE.
01/01/1987 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1987 RECOVERED IN GOOD CONDITION. THE DESCRIPTION IN LINE 7 OREGON IS ADEQUATE EXCEPT ADD--THE MARK IS AT THE HAWTHORNE BRIDGE AND NOT THE MORRISON BRIDGE.
01/01/1988 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1988 (KRN) RECOVERED IN GOOD CONDITION.
01/01/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (FV) RECOVERED IN GOOD CONDITION.
01/01/1989 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1989 (KRN) RECOVERED IN GOOD CONDITION.
01/01/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (KRN) RECOVERED IN GOOD CONDITION.
06/28/1994 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1994 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.

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