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Details for Benchmark: CZ2085

N 32° 47.507 W 111° 42.314 (NAD 83)

Altitude: 1547.6

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

Location:
In PINAL county, AZ View Original Datasheet
Designation:
AG 50
Marker Type:
survey disk
Setting:
set into the top of a round concrete monument
Stability:

Reference Points

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Located survey mark disk in the center of four cement panels (in shape of a Maltese cross).
Reference marks #1 and #2 were located at outer edge of two separate cement petals. They are "spikes" driven into the cement.

[Photos:]
photoAG 50
photoAG 50 & GPSr

Found in good shape.

[Photos:]
photoIMG_20140418_183008
photoIMG_20140418_183019

Recovered as described, in good condition.

[Photos:]
photoAG 50 / CZ2085
A close-up of the mark, with the GPSr.
photoAG 50 / CZ2085
A close-up of the mark alone.
photoAG 50 / CZ2085
A wide view of the general area, looking south.

Got this on the way to Got Ya!...and they sure got me.

Found while Geocaching in the area.

First of this kind I have ever seen, designed to be visible from an airplane. Very impressive.

[Photos:]
photoAG50.jpg

Ran across this one while doing a CITO in the area. It's a [b]VERY BIG[/b] benchmark, I guess so you can see it from the air. Still in great shape.

Found while passing through this area.

Found today while logging Farmer Tom Cache

Found while getting the Farmer Tom cache.

Found benchmark, very interesting area, interesting bit of history!

[Photos:]
photobench.jpg

Cool marker - hard to miss! US Army Corps of Engineers marker Army Map Service AG 50 (1966). GPSr coordinates were off by only a few feet N 32°47.507 W 111°42.316.

[Photos:]
photoCZ2085.JPG

Found with Team Willy Nilly Today. Interesting story behind these benchmarks. Hubbye

[Photos:]
photoBenchmark Disc

Found while doing Farmer Tom cache. Out with Hubbye today.

found today in good shape.

[Photos:]
photo2005_0921benchmark30004.JPG

Found this one on the way to Farmer Tom (GCJARC)

Found this Benchmark while doing the Farmer Tom Cache.

Found this to be in reasonable condition while finding a mini cache nearby. Have picture. Was TomSue, now RiffRaff2

After finding out about this series of benchmarks in the Casa Grande area, that are similar to the ones near my [url=http://www.geocaching.com/seek/cache_details.aspx?guid=6d6ac28b-2223-4855-ae20-283eecb62368] Lonesome Bush Cache, [/url] we had to come and check them out.

We came over here for our fourth benchmark of the day from [url=http://www.geocaching.com/mark/details.aspx?PID=CZ2103] CZ2103. [/url] This benchmark was rather easy to find, especially with the eyecatching shot up newspaper vending machine on top of it. Looked for the nearby cache, but failed on that. Now on to our next benchmark, [url=http://www.geocaching.com/mark/details.aspx?PID=CZ2299] CZ2299. [/url]

Reportedly these benchmarks were for camera alignment and resolution studies. There are others believed to be in the area consisting of lines of different length and some with a bullseye pattern, but I have not found them or seen reports of them as yet.

I found this marker today. Good condition.

I was out in the area today and ran across the marker..

Same layout as the one closer in Casa Granda and a few others I have seen. Camera Alignment for military aircraft is what I have heard.

It is still in perfect order.

[This entry was edited by ShadowAce on Friday, May 07, 2004 at 7:54:32 AM.]

[Photos:]
photoAG50

Jack, Billy, John, Russ, & Bucky (our mascot) stumbled upon this one while looking for a place to hide our new cache. We did not leave it here, as the place is strewn with all kinds of small arms shells, and gunshots were frequent and LOUD nearby. We scurried outta there! But not before we noted the coordinates of N 32 degrees 47.508 and W 111 degrees 42.316. Didn't have our digital cameras. Our first benchmark!

Documented History (by the NGS)

1/1/1966 by DMA (MONUMENTED)
DESCRIBED BY DEFENSE MAP AGENCY 1966 T-7-S. R-6-E. IN SECTION 26 NEAR THE NORTHWEST CORNER. THE STATION MARK IS A CORPS OF ENGINEERS, U.S. ARMY DISK CENTERED IN THE TOP OF A ROUND CONCRETE POST 8 INCHES IN DIAMETER PROJECTING 0.3 FOOT ABOVE THE SURFACE OF THE GROUND. THE MARK IS STAMPED--AG 50 1966 ARMY MAP SERVICE. THE STATION MARK IS LOCATED 56 FEET EAST OF THE CENTERLINE OF THE NORTH-SOUTH ROAD. 72 FEET WEST OF THE CENTERLINE OF TRAIL. 86 FEET SOUTH OF THE DRAIN. 113 FEET SOUTH OF THE EAST-WEST SECTION LINE. 106 FEET EAST OF THE NORTH-SOUTH SECTION LINE. 150.3 FEET SOUTHEAST OF THE SECTION CORNER. TO REACH FROM THE JUNCTION OF STATE ROUTES 84 AND 93 IN CASA GRANDE, ARIZONA GO SOUTHEAST ON 84 AND 93 FOR 1.3 MILES TO A NORTH-SOUTH CROSSROAD. TURN RIGHT AND GO SOUTH FOR 3.15 MILES TO A FIVE POINT INTERSECTION. TURN LEFT AND GO SOUTHEAST AND SOUTH FOR 3.0 MILES TO A CROSSROAD. TURN LEFT AND GO EAST FOR 0.50 MILE TO A CROSSROAD. TURN LEFT AND GO NORTH FOR 0.50 MILE TO SECTION CORNER AND THE STATION SITE.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in August 1993.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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