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Details for Benchmark: CZ2161

N 32° 44.019 W 111° 39.264 (NAD 83)

Altitude: 1531.7

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

Location:
In PINAL county, AZ View Original Datasheet
Designation:
AK 54
Marker Type:
survey disk
Setting:
set into the top of a round concrete monument
Stability:

Reference Points

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Found the mark in good shape, but about half of the concrete cross has been broken up.

[Photos:]
photoCZ2161
photoCZ2161 w GPSr
photoCZ2161 Area

Recovered as described, in good condition.

[Photos:]
photoAK 54 / CZ2161
A close-up of the mark, with the GPSr.
photoAK 54 / CZ2161
A close-up of the mark alone.
photoAK 54 / CZ2161
A wide view of the general area, looking north. The south petal of the cross has been pushed up over the center of the cross.
photoSouthern exposure!
Excessive Benchmark hunting can be rough on your clothing.

Recent photos show part of the cross still present. The location of the benchmark within the cross is intact.

nothing visible in the photo

Documented History (by the NGS)

1/1/1966 by DMA (MONUMENTED)
DESCRIBED BY DEFENSE MAP AGENCY 1966 T-8-S. R-7-E. IN SECTION 17 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 0.4 FOOT ABOVE THE SURFACE OF THE GROUND. THE MARK IS STAMPED--AK 54 1966 ARMY MAP SERVICE. THE STATION MARK IS LOCATED 64.0 FEET EAST OF THE CENTERLINE OF NORTH-SOUTH IRRIGATION DITCH. 74.0 FEET SOUTH OF EAST-WEST FENCE. 145.0 FEET EAST OF THE CENTERLINE OF NORTH-SOUTH ROAD. 122.0 FEET SOUTH OF THE CENTERLINE OF EAST-WEST ROAD. TO REACH FROM THE JUNCTION OF STATE ROUTES 84 AND 93 IN CASA GRANDE, ARIZONA GO SOUTHEAST ON 84 AND 93 FOR 10.2 MILES (TOLTEC). TURN RIGHT ON TOLTEC HIGHWAY AND GO SOUTH FOR 4.0 MILES TO MILLIGAN ROAD. TURN RIGHT AND GO WEST FOR 2.0 MILES TO CROSSROAD 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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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