Skip to Content

Details for Benchmark: RD0027

N 45° 32.550 W 122° 16.500 (NAD 83)

Altitude: 46.61

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

Location:
In MULTNOMAH county, OR View Original Datasheet
Designation:
TUNNEL RM 1
Marker Type:
reference mark disk
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.

Found while on a geocaching trip. Beautiful area and BM in good condition.

[Photos:]
photoTunnel 1

One of two markers found down by the river.

I was looking for the nearby Cache but did not find it. Instead of the Cache I recoginized this Benchmark.
It is in good condition

Found this intact. Benchmark disc is now missing.
http://www.geocaching.com/mark/log.aspx?LUID=0648b7e2-683e-4cb6-96ea-48f8af4aafb0&IID=78092dcb-9e5e-4292-a8e1-9b7811be0623

[Photos:]
photoRD0027 TUNNEL RM1
Reference marker to the right of the benchmark looking towards the river.

Found while out caching in the gorge.

[Photos:]
photoIMG_20140624_183604_290

Found all the markers while in the area with Wearn3.

found all these benchmarks with BlueMoth today.

[Photos:]
photoimage

Great little benchmark reference to find at the rest area..

[Photos:]
photoBenchmark September 2013 / 2

Located with the other ones nearby on our trip from Massachusetts.

Found Tunnel RM1 while in the area.

Still there!

Found, as described in good condition. East of three marks at Tunnel Point view point off I-84 between Portland and Bonneville Dam, OR.

[Photos:]
photoRD0027 TUNNEL RM1 mark
photoRD0027 TUNNEL RM1 view W
View to the W; TUNEL RM1 in foreground; TUNNEL about middle of photo and TUNNEL RM2 behind, near sign.
photoRD0027 TUNNEL RM1 view E
View E of TUNNEL RM1; TUNNEL in lower right foreground.

Found with two others nearby while taking a break from driving!

[Photos:]
photoTUNNEL RM 1
photoTUNNEL RM 1-- a few feet away

Out this way with MulderNScully and Anaddicted23. What an agenda we had!

Early morning sightseeing trip to this area with anaddicted23 and jbean2921. We pulled over for the view and found these three stations in a row. RD0025, RD0026, and RD0027. All in good condition.

[Photos:]
photoRD0027 Tunnel RM1

TUNNEL RM 1 ALONG WITH STATION TUNNEL AND TUNNEL RM 2 FOUND IN GOOD CONDITION.

[Photos:]
photoRD0027 Multnomah County, Oregon
photoRD0027, RD0026, RD0025 AREA PHOTO, Multnomah Co OR

Second benchmark of three we found at this stop - good times!

Found while caching on our holiday in the USA

[This entry was edited by AusTrackers on Saturday, February 13, 2010 at 5:31:11 PM.]

[Photos:]
photoBM RD0027

Found this and two others when I stopped to take photographs.

[Photos:]
photoTunnel No 1
One of three found when I stopped to take photographs.

Found while in the area on a day trip to the falls.

[Photos:]
photoTunnel No 1

Another find in this spot along the river.

Found this one as part of a cache in the area. This is the one on the right. Kind of neat finding three so close to each other.

[Photos:]
photoTunnel 1
This one is on a pipe
photoClose up
photoAnother angle

Found today at the rest stop.

Found it along with 2 other benchmarks! CAASKT68

Here's my GPS reading for this benchmark:

N 45* 32.567'
W 122* 16.517'

My #2 son, Christopher, and I attended the 8th Annual Columbia River Gorge Geocachers Potluck in North Bonneville this afternoon. We did some benchmarking and geocaching before and after the Event. This was my 14th find and Christopher's 19th find of the day. This was our final find of the day. Beautiful sunset as we drove into Portland.

[Photos:]
photoTUNNEL RM 1 reference mark disk
photoLocation of TUNNEL RM 1 reference mark disk
photoChristopher getting updated coordinates

Stopped by whils using this for a nearby cache.

3 in a row!

Found with halfwaycrazy & ramchargergirl74

boom boom boom

[Photos:]
photothird benchmark with gps

3 of 3 found

Found BM to be intact and in great shape.
SWANINWA

[Photos:]
photoRD0027 Benchmark

Found this BM after leaving WWFM Event, BM, still intact and in great shape. Shelrik...

Found this after a day exploring the falls and the gorge.

[Photos:]
photoRD0027 benchmark

Blue, blue water, green, green trees, yellow, yellow old grass, and ugghh, more black asphalt, alas tine to get back on the road!

One of 3 while caching at Broughton's Expedition

Just happen to stop for a Photo OP. and walk into it!!

This was about 10 feet away from RD0026.

Great view from this one!

Found this one while looking for a cache in the area.

Found this benchmark after grabbing the nearby geocache during a trip home after a weekend in Yakima.

Found it while doing a cache.

Found this one while finding "GCJ680 Broughton's Expedition".

[Photos:]
photoTunnel No 1 Benchmark

Happened upon this BM and it RMs while stretching our legs. A nice bit of histroy here, too.

Great day to enjoy the gorge. Cache nearby, too.

My first benchmark!

A cache and a benchmark, what a deal!!!

Stopped by to grab cache and found this bench mark.

Found this one while caching the gorge and finding Broughton's Expedition. Very cool.

Found on caching trip while visiting Oregon.

[Photos:]
photoThe disk

Found it on the way to Beacon Rock. Hadn't downloaded Broughton's Expedition but stopped to read the sign. The marks were too obvious to pass up.

Found it on the way to Beacon Rock. Hadn't downloaded Broughton's Expedition but stopped to read the sign. The marks were too obvious to pass up.

Found this benchmark in good condition with easy to read markings. Good day caching and wonderful view.

Good view of the river from here.

[Photos:]
photoBenchmark in Multnomah County, OR

Found it while caching.

Found this one at a viewpoint while geocaching!

Found this and others nearby looking for the Broughtons Expedition Cache

Found this and others nearby looking for the Broughtons Expedition Cache

Found it while working on Broughton's Expedition.

This was the first of three benchmarks we found while taking a break from driving and hunting for the Broughton's Expedition geocache.

[Photos:]
photoRD0027 Benchmark

One more!

[Photos:]
photoTunnel Ref. 1

Found while looking for Broughton's Expedition.

Found while looking for a missing cache.

I had trouble reading the markings, but this was with two buddies standing sentry over the river.

THIS ONE WAS ANOTHER EASY TO FIND BENCHMARK RIGHT NEXT TO THE ROAD ON OUR 6000 MILE TREK ACROSS THE GOOD OLE USA.

MARK IN GOOD SHAPE.

[Photos:]
photoRD0027 TUNNEL RM 1
TUNNEL REFERENCE MARK 1.
photoRD0027 TUNNEL RM 1 FROM STA
TUNNEL REFERENCE MARK 1 FROM TUNNEL.

FOUND WITH CHARLIE AND THE KIDS.
ON OUR 6000 MILES TRIP ACROSS THE USA.
TIGGR

We were along with grandpa GEO*TRAILBLAZER 1 and TIGGR our grandma when we recovered the mark.

We were lucky enough to be with our Grandpa,GEO*TRAILBLAZER 1 and our Grandma TIGGR when they recovered this mark.

late but logged

Last of the three bench marks at this rest stop.

Found on the way to finding Broughton's Expedition.

While looking for Broughton's

Found while searching for Broughton’s Expedition.

Found this with Debiko

Pretty neat! Found 3 benchmarks all in a "nest" together, while looking for a GeoCache. Debiko & Downshifter

[Photos:]
photoCloseup of benchmark

Found it while finding an offset cache.

Here's another one.

All appeared well.

Found it.

great view.

Explained these bench marks to the nearby RVers and was able to find the geocache without detection.

Found while geocaching in the area for GCJ680.

like everyone else... while geocaching

[This entry was edited by Reddgroom on Thursday, August 04, 2005 at 11:17:15 PM.]

Found while caching, Neat 3 benchmarks within feet of each other.

Found while caching in the gorge.

[Photos:]
photoRD0027

Found this benchmark while looking for GCJ680.
N45 32.566 W122 16.527 on GPS.

[Photos:]
photoBenchmark setting
photoBenchmark & GPS

This was a three for all! Thanks again and again Nomadic Man.

Found while hunting Geocache GCJ680

[Photos:]
photoRD0027.jpg

Found while hunting geocache GCJ680.

[Photos:]
photoRD0027

Found the same way everyone else did...
-legoboyjj

Found this and its friends today!

A very easy find along I-84. This is the location of a great viewpoint of the Columbia River!

Found this one of 3 within 40 feet of each other while hunting Nroughton's Expedition (GCJ680)

Did while doing geocache in area.

I stopped here for a rest and saw these three benchmarks just sticking out. So I took some pictures of them. Great viewing area of the Columbia River.

[Photos:]
photoTunnel 1
Third of three benchmarks along the roadside stop.

Found by accedent on I-84 on our way through Oregon.

Our first benchmark find! Located while geocaching near the historical information sign.

Found while doing a geocacher near by.

Found this one while geocaching.

[Photos:]
photo139-3952_IMG.JPG

Within a couple yards of the Triangulation station

Found this one near the Beaver Board.

[Photos:]
photoTunnel RM1 Disk

I seen it.

Stumbled upon this set of three while gathering data for a new Oregon History Lesson cache.

Documented History (by the NGS)

01/01/1956 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1956 0.8 MI E FROM CORBETT. 0.8 MILE EAST ALONG U.S. HIGHWAY 30 FROM THE UNION PACIFIC RAILROAD STATION SIGN AT CORBETT, IN T 1 N - R 4 E, AT TUNNEL POINT, AT A ROCK FILL EXTENDING TO THE WATER, 47 FEET EAST OF THE EAST ONE OF TWO WOODEN POLE LEGS SUPPORTING A HISTORICAL MARKER, 40.6 FEET WEST OF THE CENTER OF THE NORTH END OF A 6-INCH CORRUGATED METAL DRAIN PIPE, 24.6 FEET NORTH OF A CIRCULAR CONCRETE CURB, 19 1/2 FEET SOUTHWEST OF THE NORTH EDGE OF THE ROCK FILL, 15.4 FEET EAST OF TUNNEL TRIANGULATION STATION, AND BRAZED ON TOP OF A 2-INCH IRON PIPE PROJECTING 0.9 FOOT ABOVE THE GROUND. NOTE-- SLANTING DISK, ROD HELD ON THE LETTER R OF THE WORD REFERENCE.
01/01/1979 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1979 REACHED FROM CORBETT BY GOING EAST ON INTERSTATE 80N FOR 0.75 MILE TO THE MARK ON THE LEFT, 0.05 MILE NORTHEAST OF MILEPOST 23 AT THE TUNNEL POINT PARKING AREA, 15.40 FEET EAST OF TRIANGULATION STATION TUNNEL 1956, 14 FEET SOUTH OF THE TOP OF THE ROCKY BANK ABOVE THE RIVER, AND 12 FEET NORTHEAST OF THE GUARD RAIL IN A PIPE THAT HAS BEEN REINFORCED BY AN IRREGULAR MASS OF CONCRETE, AND PROJECTS 12-INCHES.
01/01/1987 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1987 RECOVERED IN GOOD CONDITION. NEW DESCRIPTION FOLLOWS. 1.53 KM (0.95 MI) EAST ALONG INTERSTATE HIGHWAY 84 FROM THE OVERPASS AT EXIT 22 IN CORBETT, AT TUNNEL POINT, ON THE NORTH EDGE OF A CURCULAR VIEW POINT, 7.5 M (24.6 FT) NORTH OF THE CURB OF THE PARKING AREA, 14.3 M (46.9 FT) EAST OF THE EAST LEG OF AN HISTORICAL SIGN, 12.3 M (40.4 FT) WEST OF THE NORTH END OF AN 0.15 M (0.5 FT) DIAMETER CEMENT PIPE CULVERT, 4.7 M (15.4 FT) EAST OF THE STATION MARK. A DISK BRAZED ON TOP OF A 2-INCH IRON PIPE OF UNKNOWN DEPTH. NOT LEVELED THIS SURVEY. THE MARK IS 0.3 M BELOW THE PARKING AREA.
01/01/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (FV) 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.

Advertising with Us

Return to the Top of the Page