Skip to Content

Details for Benchmark: GR0590

N 36° 00.900 W 114° 44.200 (NAD 83)

Altitude: 1234.86

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

Location:
In MOHAVE county, AZ View Original Datasheet
Designation:
S 135
Marker Type:
bench mark disk
Setting:
light structures
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

[Photos:]
photoGR0590

Found this benchmark while visiting the Hoover Dam

[Photos:]
photoS 135

When i walked over the dam i saw some of these benchmarks and took some photos. now i try to figure out. which i found.
this was definetly one of them

While doing our roadtrip, I didn't think of the benchmarks. I found at least a cache a day, but about benchmarking I was just remembered as soon as I walked this dam. They are everywhere. So when I saw them I took z photo, and now I try to log them.

[Photos:]
photoS 135

Grabbing a few of these things on my way back to the car. There are a lot of them.

Since I was traveling from California to Utah alone today, I decided to add a number of hours to the trip and visit the dam. I enjoyed it and I was able to find a few geocaches and benchmarks along the way.

Mark is in good shape.

[Photos:]
photoClose up
photoSurroundings

Touring the bridge and dam today and then using www.findbenchmarks.com to find a ton of marks on the dam. I wish I could have had a few more and I would have pulled off a really easy 25 BM day! Oh well.

This one looks good with clear markings and right where it says it should be.

[Photos:]
photoS 135 Up Close
photoS 135 Setting View
S 135 looking south along the north sidewalk.

Visiting Hoover Dam!

[Photos:]
photo

no problem finding this BM while out finding nearby caches

Stumbled across this while visiting the Hoover Dam.

[Photos:]
photoS 135

Good

Seen it during our visit from the Hoover Dam. Thanks for making this listing.

Found it...

[Photos:]
photo

Visting Hoover with LincolnsAunt and Dirkster.
Graded many of the nearby bench marks

One of many BMs spotted at Hoover Dam.

[Photos:]
photo
photo

Found as described

[Photos:]
photo

Found while visiting the site.

[Photos:]
photoBM at site

Found with a few others as a surprise on Hoover Dam.

[Photos:]
photoS135 on Hoover Dam

I was in Vegas for a long weekend and spent the morning at Hoover Dam, grabbing the new virtual and searching for benchmarks, before heading to the airport for my redeye home. I was here five years ago and noticed they are all over the place, so why not log them. Spotted this one in good shape.

This one easily readable as 'S135.' It matches the description and the most useful part is that it is on the upstream sidewalk directly across from the Arizona side (women's) restroom.

[Photos:]
photoS135

Found it

We found many of these benchmarks visiting the dam AND the new virtual cache!

Found it

[Photos:]
photo

Found while visiting the dam and grabbing a nearby virtual cache

[Photos:]
photo

Mit Stage_Worm diesen Benchmark gesucht und gefunden.....

Auch diesen Benchmark konnten wir schnell finden !

Also found this one on my walk on the dam.

Found on my trip to Hoover

Cool Location with a lot of Benchmarks here.

Wow so many Benchmarks here.

OMG! Seems as the whole Hoover Dam is covered with Benchmarks. I found quite a lot, but not sure if I found all of them. Many of them are located just within a couple of feet.

Found on the walk over the Dam today!

[Photos:]
photoPic of mark

... on the road with krauswaller ...

TFTBM ... and best regards from austria !!

vacation in california, nevada & arizona together with maybe...
during our sightseeing tour through san francisco we visited awesome locations, found some geocaches and benchmarks.
thanks a lot for this benchmark.
tftbm
greetings from tyrol / austria - krauswaller

Found in good condition.

[Photos:]
photoGR0590

meet it during visit Hoover Dam

Found it on my trip to Hoover Dam

[Photos:]
photoBenchmark

Found at 13:01 with we4fullers (my brother-in-law's family). I'm down here from the Seattle area for a couple of weeks causing havoc for them.

[Photos:]
photo
photo

Great day at Hoover Dam geocaching and getting some BM's with my brother in law down from Seattle (2nd1of3) and family.

[Photos:]
photoS-135
photoS-135

We walked the dam, and probably looked silly stopping to take pics of all the benchmarks we could see. I expected there to be some, but wow!

Found this Benchmark while our road trip on this awesome monument. It must be been like hell to build this all year long.

[Photos:]
photo

Found during our USA vacation

Recovered In good condition.

[Photos:]
photoGR0590

My first benchmark find ever! Accidentally noticed this one on the ground while visiting the dam.

Found this while walking the dam.

Walked the entire length of the dam both sides and photographed all the benchmarks we could find. All we found were in good shape.

so many benchmarks on the dam... (and irritating plates that are no benchmarks)

Saw this benchmark while visiting Hoover Dam.

[Photos:]
photo

I found this benchmark while visiting Hoover Dam today.

[Photos:]
photoPezgremlin visiting benchmark GR0590
photoPezgremlin visiting benchmark GR0590

Found on dam

[Photos:]
photoimage

Found strolling along the Hoover Dam

Found while walking the dam today.

[Photos:]
photoGR0590 ~ S 135 - Hoover Dam, AZ

Recovered in good, readable condition while visiting the Hoover Dam.

[Photos:]
photoS 135

Thanks!

[Photos:]
photoimage
photoimage

Found while visiting the Hoover Dam with Fun-gi and Savvy*cacher.

[Photos:]
photoS135

2Moore and I found this one while visiting the Hoover Dam.

Found this benchmark while exploring around the Hoover Dam with Shelle518.

Adding a few BM while visiting Hoover Dam. Found this one with JCLBA, Tatie and PatrickValerie

I found this waymark while visiting the area with PatrickValerie, Lison55 ans JCLBA.

[Photos:]
photoS135

Found this BM while visiting Hoover Dam with JCLBA, Tatie and Lison55

[Photos:]
photoS135

Discovered while geocaching around the Hoover Dam.

[Photos:]
photo20151111_123156

Found while visiting the dam while in Las Vegas for a convention

Found whilst crossing Hoover Dam with the family.

[Photos:]
photoDSC_0329

Found this one and many others while visitng the Hoover Dam and do some geocaching in this area.

Found this while visiting the Hoover Dam with family.

[Photos:]
photoBenchmark Disc S135

Found during our tri-state road trip finding caches, earthcaches, benchmarks, and waymarks along the way.

[Photos:]
photoBM S135

The sun was so bright, I just hoped I got a good photo of these gold BMs.

[Photos:]
photoS 135

Out grabbing as many Dam Benchmarks as I could find.

[Photos:]
photoS135

Another very shiny one. It really helps to be able to read the reference numbers.

Discovered this one while visiting the dam.

It looks OK.

[Photos:]
photoGR0590
Benchmark seen on Hoover Dam.

My first official US Benchmark! I have found quite a few but this is the first one I looked up after our trip to Hoover Dam.

[Photos:]
photoThe cap

Found while visiting the dam.

Observed Benchmark as Described.

[Photos:]
photoGR0590

Discovered this one while visiting the dam.

Found it today while visiting the Dam.

Greetings from Germany.

[Photos:]
photoBenchmark Hoover Dam
Benchmark Hoover Dam

Two German make a trip across the pond to the west coast of the US ..
In addition to the usual sightseeing, there was also time by one or another cache or Benchmark.

Found while at the Hoover dam

Together with Raistlin_Storm found on our trip through the Southwest of the United States this benchmark

Found a few Benchmarks while wandering around and caching at the Hoover Dam.

Found after a Dam Tour

[Photos:]
photoBenchmark 3

man are there a few benchmarks on this dam!!!

Found while exploring the dam with the magtfplanner crew !

[Photos:]
photoS 135

Found this while visiting the Dam.

[Photos:]
photoBenchmark2

Found with spooky_luke whilst exploring the dam

Found while exploring the dam

[Photos:]
photoBM_S135

Found whilst exploring the Hoover Dam

[Photos:]
photoS135

Found it today at Hoover Dam.

[Photos:]
photo10 Aug 2014 7199 cr

Auf unserer USA-Reise haben wir auch den Hoover Dam besucht und hier unseren ersten Benchmark gefunden.

[Photos:]
photoGR0590
photoZwei Cacher auf dem Hoover Dam.

Found this benchmark along with many others while walking across the Hoover Dam.

[Photos:]
photoS135 Closeup

Benchmark heaven!

Hab Dich gesehen!!

[Photos:]
photoGR0590

While visiting the Hoover Dam, we noticed the benchmarks along the Dam. So we thought that was awesome.

[Photos:]
photoBenchmark S 135

Visiting from S. Florida and checking out all the benchmarks on the Hoover Dam. Pretty cool!

[Photos:]
photoGR0590-S_135-1-20140228
photoGR0590 Gungadoy

Found while touring the dam today.

Found whilst visiting the U.S. together with Turako and Silas07.

Discovered while working on the E.T. trail in December

3rd of many found at Hoover Dam

Found today while geocaching & touring with Catapult Jeff & Iron Maiden.

Found it today at 11:50a

[Photos:]
photoS 135

Out and about find BM while view the cool sights of Hoover Dam with IXF.

[Photos:]
photo9_27_2013 BM S135

We stopped at the Hoover Dam as part of our 6,000 mile road trip. We couldn't resist getting 10+ benchmarks in just a few minutes! I found this with my crew - Universal Warrior, Scooby boy, and Y dance girl!

[Photos:]
photoGR0590 - S135

I had a hard time trying to figure out what Benchmarks I found because of all the wild logging and picture posting. I had a great time at Hoover Damn anyway and think that the 12 I found are correctly posted with the right pictures.

[Photos:]
photoGR0590

Found in good condition

[Photos:]
photo148

Found while visiting the Hoover Dam. Lots of benchmarks here!

We were suprised with how many marks there were here.

On our trip to the Hoover Dam we spotted a number of benchmarks, which we photographed. I should have taken a GPS reading, but I figured the photo would be good enough. It did take some work to track down which benchmark it was.

[Photos:]
photoS 135 Hoover Dam Benchmark

Visiting Hoover Dam

This entry was edited by DeltaMikeAlpha on Sunday, 28 April 2013 at 21:51:46 UTC.

[Photos:]
photoBM

Another Benchmark found at the Dam.

Making a Benchmarking trek back and forth across the dam. Snapped a pic

[Photos:]
photoIMG00338

Didn't have my GPS for this impromptu visit to the damn, but with photos and the NGS website I was able to find the coordinates to log this benchmark.

While Visiting Hoover Dam I stumbled over this mark...

[Photos:]
photoMark + GPS

Found this at the visit the Hoover Dam.

[Photos:]
photoP1000676

Found this benchmark with the family during our 3 week road trip visiting the National parks east of Vegas.

[Photos:]
photoDSC_2642

On our trip to the Hoover Dam we also saw this disk.

One of 8 BM's found today on the Hover Dam bridge in 106 degree heat.

[Photos:]
photoGR0590

Still there.

[Photos:]
photoS135

found in good condition

[Photos:]
photoBM-GR0590

Found while touring the dam. Mark is in great shape.

[Photos:]
photoGR0590
Designation - S 135
photoGR0590 Area
Designation - S 135
photoGR0590 w/ gps
Designation - S 135

I walked across the top of the dam taking photos of all of the benchmarks I could find by sight in the twilight. Thanks!

[Photos:]
photoS 135

Nice

[Photos:]
photoS 135

Recovered as described at N 36 00.920 W 114 44.206 which is 125 feet at 336 degrees True from listed scaled coordinates.
edexter

[Photos:]
photoDisk and GPSr coordinates

Found this benchmark while visiting the Dam with friends.

[Photos:]
photo2012-04-18_09-59-50_845

Disk is still good readable. Found this (and its neighbour) by surprise while taking pictures of Dam surroundings. Water level is low !
Regards from The Netherlands.
Photo taken at 14:12

[Photos:]
photoHooverdam_20120418_141228

What an amazing spectacle! This was our first major stop while visiting Vegas.

The Zombie Horde was enjoying the view and the history.

[Photos:]
photoBM

Spotted this BM while walking across the dam.

[Photos:]
photoGR0590 ~ S 135
photoGR0590 ~ S 135

Good Condition

[Photos:]
photoBM-S135

While we made a trip to the E.T. Highway, Route 66 and other nice places in and around Las Vegas, we found this Benchmark.

Regards from Germany

Team Fridolin

Mission Christmas 2011

Christmas in Las Vegas together with Team Fridolin, Detection and netteleut(h)e. Besides the tourist must-it went from here to some great cache tours.

During our tours we also come to a few Benchmarkes .

Many greetings from Germany
SkyTrain

While visiting the Hoover Dam we walked on some of them positioned around this monument...

Greetings, Detection

One of 12 marks found on Hoover Dam this day.

[Photos:]
photoS 135 11.19.11

Only geocachers and benchmarkers care about a disc on the ground and take pics when everyone else is taking pics of the dam, huh.

found while visiting the dam. located as described.

[Photos:]
photos 135

RECOVERED IN GOOD CONDITION.

Found While Walking Hoover dam

one of many marks seen atop the dam...

[Photos:]
photo7.27.11 - 059 (Small)

On vacation with the family and picking up a few BMs as we walk the dam

[Photos:]
photoClose up - QR0590 S135 1935

One of many benchmarks that I found while on the Hoover Dam.

[Photos:]
photoS 135
Benchmark on the Hoover Dam

Found this one while visiting all the rest of the Benchmarks on the dam.

While visiting Hoover Damm

Found it while on Damm

Found it with friends from Pennsylvania.

Saw it at the dam.

[Photos:]
photoPicture 018

First of many benchmarks for us today at Hoover Dam. Hit the jack pot here.

[Photos:]
photoS135

[Photos:]
photoS_135

found while visiting the dam - kiwilex

[Photos:]
photoS135

Our daughter discovered the first benchmark here at the Dam and then went looking for more.

Found during THE MISSION - what means my Geocachingtrip in the USA in 2011.
mobilekirk

Found on the way to LV
THX GRAC

Found while touring the Hoover Dam
-jdevor

[Photos:]
photoS135

At the dam today collecting a few benchmarks.

Found it while touring the dam

Found while visiting the dam today.

[Photos:]
photoVegas2011 179

Found this one while touring the dam today.

[Photos:]
photoS 135

Found while spending some time on the amazing Dam and looking at the beautiful bridge above.

lots of benchmarks to see while walking...

Found in great shape

Another dam benchmark

Found during our walk on the Hoover Dam. It quite easy to find these here as there are many. martyx (Czech Republic)

[Photos:]
photoS 135

Found this one on the Hoover Dam. Took more time to search it on the site than it did to find the thing! LOL

-Neko & Hiiri

Found while walking the Hoover Dam

[Photos:]
photoDSC00730

walk across hoover dam and try NOT to find a benchmark. i dare you!

Another BM I found at my visit of the dam.
Cheers, Wolf

[Photos:]
photoIMG_1157

On way to Grand Canyon West via Hoover Dam

Found this benchmark while walking across Hoover Dam from one end to the other--excellent condition!

[Photos:]
photoS135

Found this with Blaise Orange

N 36° 00.918 W 114° 44.204

Found walking on the Dam after the tour.

[Photos:]
photoGR0590

recovered benchmark in good condition at hoover dam.

[Photos:]
photo08-S-135 Hoover Dam

Touring the dam and logging benchmarks.

Dam benchmark

Dam benchmark

Another dam BM

[Photos:]
photoGR0590

A fun day on the Dam!

[Photos:]
photoS 135
Benchmarking and Geocaching at all opportunities :).

While caching towards Boulder City, spotted this one while visiting the Hoover Dam.

John of Honeoye Falls, NY

Found while visiting the Hoover Dam and on our way to Boulder City, Nevada.

ElbaPatch, Scott, Elba, NY

Was headed to St. George from Phoenix and stopped at the dam!
NICE!

Found during Las Vegas trip and visit to Hoover Dam

[Photos:]
photoGR0590

Spotted while walking across the dam

Found while walking on the Hoover Dam.

[Photos:]
photoS 135

Found it while on a mini vacation/road trip with Vargseld.

Found this one while visiting the dam.

[Photos:]
photoThe benchmark

Found with cosmogirl while at the Hoover Dam. I.D. numbers are in good condition.

Found while enjoying a visit to the Hoover Dam.

[Photos:]
photoGR0590 "S 135" Close-up

Found this while exploring the dam

Found as described.

[Photos:]
photoGR0590

Found this one on Hoover Dam on our USA trip.

[Photos:]
photoBenchmark Hoover Dam

found it

found it

Our fourteenth benchmark find on our stop at Hoover Dam on the way to Las Vegas.

[Photos:]
photoBenchmark S 135

Found this one on Hoover Dam. Landnavmaster

[Photos:]
photoHoover Dam S-135
Hoover Dam S-135
N 36° 00.921 W 114° 44.207

elevation 1153 ft Found in good condition as described

Found the dam benchmark on the damn dam lol that never gets old

Found while visiting the dam.

[Photos:]
photoS135-1
photoS135-2

Found touring Hoover Dam site

Another one from Hoover Dam.

[Photos:]
photoGR0590 marker

Spent a beautiful day finding benchmarks on Hoover Dam.

[Photos:]
photoGR0590

Found this benchmark touring Hoover Dam.

S135. Found while touring Hoover Dam.

[Photos:]
photoS135 On Hoover Dam
photoA closer look S135

Enjoying the damn when we found a few benchmarks

[Photos:]
photo0117 Vegas Trip 042

Found on a trip to the damn.

[Photos:]
photoS 135

Out with Fiddlefiend for a nice day of identifying benchmarks. Mandolinman.

[Photos:]
photoGR0590

nice find

2nd day at Hoover dam - found more benchmarks......

[Photos:]
photoDSCN1869

Found after a tour of the dam. Lots of benchmarks on the dam.

[Photos:]
photoS135

One of eight today in the area. I have never had a chance to find this many right in the same area.

New to Benchmarking and found a few today.

[Photos:]
photoGR0590

Found this and some other BM's today ^^

Found with 007 and picked up yet another benchmark.

Seems like there are benchmarks every 50 feet on the dam!

Found it with my bro.

[Photos:]
photoGR0590

My 3rd on hoover dam I have been over this thing about 100 times in the last 21 yrs. Glad I was educated on what the meanings are for these little gems..

[Photos:]
photo100_0750

LOVE these things!!

[Photos:]
photoS135

One of several benchmarks found while playing tourist at the Dam.

Found it while walking across the dam.

[Photos:]
photoBenchmark S135, Hoover Dam

Great place to find benchmarks!

Recovered as described.

[Photos:]
photoGR0590 Disk on Hoover Dam

Saw these as we walked across the dam. Thanx!

Just one of several that I found while visiting Hoover Dam.

One of many found

[Photos:]
photoIMG_2932.JPG

Found it while visiting the dam.

Found it !!

[Photos:]
photoS 135

We weren't really planning on looking for benchmarks during our visit to Hoover Dam, but they were everywhere we looked. Managed to match 9 photos to the descriptions once we returned home!!

[Photos:]
photoGR0590 S135.JPG

Another one!

[Photos:]
photoAnother one

Found this while on our Vagas vacation with Daddy D-tour. Spent the day at Hoover Dam and Boulder

Found this with oldest daughter Nightfox while on vacation in Las Vegas, took a road trip out Hoover Dam.

[Photos:]
photoP3060037.JPG

One of many found along the dam. On our way back from Phoenix to Sacramento, via Grand Canyon and Hoover Dam. Nice break along the way!

[Photos:]
photoOne of many found

Was not even looking for it, but found it during a walk over the dam.

Found without difficulty!

Mark found in good condition.

Found after touring the dam.

[Photos:]
photoS 135 Disc - Hoover Dam, AZ.JPG

One of many found on top of the dam today!

[This entry was edited by Team Js on Friday, August 25, 2006 at 6:12:53 PM.]

[Photos:]
photos135.jpg

Found it while on vacation to the see the Dam!!

Found this while on vacation.

[Photos:]
photoVacation 2006 357.jpg

Hoover Dam is incredible!

[Photos:]
photoHoover Dam.jpg
photoView of Hoover Dam

Found on the Hoover Dam.

[Photos:]
photoDSC05201.JPG

One of several benchmarks that we kept running into... literally.

[Photos:]
photoS 135

Found this benchmark together with vagabund from austria.
Just started geocaching on this US roadtrip.

only1 from austria

Found it while finding a nearby virtual cache.

Mark and Wendy from Team Fuji found this on the walk across the Hoover Dam

[Photos:]
photoDisk as seen from above
Mark and Wendy from Team Fuji found this on the walk across the Hoover Dam

Found in good condition.

[Photos:]
photoS 135

This was one of several benchmarks that I found while walking over Hoover Dam this evening.

[Photos:]
photoBenchmark with GPSr

Easy bencmark to find.

[Photos:]
photoS 135 benchmark
Here it is!

Was in Vegas with my boyfriend Doltishguy and found this one. Just now getting my own account set up to log it. See Doltishguy's entry.

My girlfriend and I were walking across the Hoover Dam and saw it. Didn't have my GPS because I wasn't in the benchmarking frame of mind......

[Photos:]
photoS 135
N 36° 00.919 W 114° 44.205

Found S 135 while searching around with the kids today.

We did not have any of the benchmark informations, but we found a good number of them just by looking around. My numbers were a tad different for this then posted.

[Photos:]
photoS 135 + GPS

Found along with a bunch of other benchmarks while touring the dam.

[Photos:]
photoS 135

Found it.

[Photos:]
photoS135

Found it.
Cheers M+S

[Photos:]
photoS135.JPG

Found it by the walk over the dam

[Photos:]
photobenchm3.JPG

The only problem here is keeping track of all the benchmarks around here.

Found as described and at handheld coordinates N36-00.921 W114-44.204.

[Photos:]
photoGR0590 - the Mark
photoGR0590 at Hoover Dam, NV

Recovered in good condition.

[Photos:]
photoS 135 -- MOHAVE county, AZ

found it

Found this by accident.

[Photos:]
photoS135.JPG

Found as described.

[Photos:]
photoGR0590

Found it!

Found as described

Found with Skydive121

One of a bazillion benchmarks found here on Friday the 13th. I guess it made paying for parking worth it. Found with Zues_4.

Found it!

[Photos:]
photoS 135

got it

Recovered in good condition

Found this while visiting hoover dam.

[Photos:]
photohere it is

Found today with many others on the bridge.

One among many that I found in the area while walking across. Still in good condition even after all the trompling it has endured over the yeras.
MTCowgirl

Beautiful day at the dam.

[Photos:]
photoHoover Dam

Found it in OK Condition

[Photos:]
photo1
1

Found with mom

Found this while on vacation,what a site.

Found while touring the dam.

Found on our way to vegas after hiking the Grand Canyon.

Face is becomming very worn due to high foot traffic.

Mark located as described in good condition.

N 36° 00.920 W 114° 44.204

Found as described.

[Photos:]
photoMarker
N 36° 00.921 W 114° 44.207

Benchmark recovered as described, in good condition.

This is a Coast & Geodetic Survey Benchmark.

[Photos:]
photoS 135 Benchmark w/GPSr
photoS 135 Benchmark
photoNorthwest at the S 135 Benchmark

Found it

Found it while doing the virtual at the dam

[last edit: 7/6/2003 4:05:07 PM PST]

A plethora of benchmarks on the Dam!

[Photos:]
photoPeripatetic Piglet

I tripped on this one.

Was walking across the dam, saw the benchmark and remembered this site.

[Photos:]
photoHD-BM

Bookiew and Paulw found this benchmark today while touring the dam. Looked down and there it was. Pictures to follow when I get to my usb port!

Bookiew from VA

Was here too
Billzjeep

BM set along roadway on top of Dam--some show exesive foot-traffic wear; S135 shows less damage and residual road paint

[Photos:]
photoHooverDam BM S-135

Documented History (by the NGS)

01/01/1935 by CGS (MONUMENTED)
01/01/1950 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1950 IN HOOVER DAM. ON TOP OF HOOVER DAM, ABOUT 75 YARDS NORTH OF THE SOUTHEAST (ARIZONA) END, DIRECTLY ACROSS THE ROADWAY FROM THE ARIZONA REST ROOM TOWER, NEAR THE CENTER OF THE EAST (UPSTREAM) SIDE OF BLOCK D, IN THE TOP OF THE EAST CONCRETE SIDEWALK, 0.4 FOOT EAST OF THE WEST EDGE, AND 3.5 FEET WEST OF THE EAST GUARD RAIL.
01/01/1963 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1963 RECOVERED IN GOOD CONDITION.
01/01/1981 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1981 RECOVERED IN GOOD CONDITION.
01/01/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (MG) RECOVERED IN GOOD CONDITION.
01/01/1990 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1990 (GG) 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