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Details for Benchmark: DV0506

N 33° 30.033 W 112° 21.483 (NAD 83)

Altitude: 1048.6

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

Location:
In MARICOPA county, AZ View Original Datasheet
Designation:
T 258
Marker Type:
bench mark disk
Setting:
set into the top of a round concrete monument
Stability:
May hold, but of type commonly subject to surface motion.

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Found this bad boy on a night mission with William the Brave. It might just be the easiest find out there. I just had to be the next person to log it after my good friend blackhorse221.

[Photos:]
photoT 258 (DV0506)
Night image taken 2014-02-22

Mark is still in good shape, just off the road. Didn't have a separate GPSr, so I took a photo with a geocam app.

[Photos:]
photo1376941138856

Found in good shape

[Photos:]
photoIMG_20121220_103403
photoIMG_20121220_103413

Found in good condition.

[Photos:]
photoLooking south
photoCloseup of marker
photoDV0506 T258 Disk w/ GPS

Recovered. Condition in pictures is accurate.

[Photos:]
photoDV0506 - Mark with GPSr
photoDV0506 - looking southernly

This mark is remarkably still intact even after all of the improvements of a subdivision. The mark is a described earlier alongside a driveway and just west of a subdivision road. The mark is in good condition.

A beautiful location to find an old mark in.

[Photos:]
photoT 258 - Maricopa County, AZ
photoT 258 - Maricopa County, AZ
photoT 258 - Maricopa County, AZ

Was able to spot this one from the car. Located just South of driveway of the residence at 516 Old Litchfield Road. On West side of Old Litchfield Road just South of the intersection of Campbell Road.

[This entry was edited by RazorbackFan on Friday, March 23, 2007 at 5:29:19 PM.]

[Photos:]
photoCloseup of Disk
photoOverview
Photo taken looking West. Shows marks relation to Old Litchfield Road and driveway of house number 516.
N 33° 30.039 W 112° 21.489

The description is adequate. It's pretty obvious, sticking out of someone's lawn!

[Photos:]
photoT258 / DV0506

Looking around in the late evening, we located the benchmark about 30 feet north and 14 feet west of the given coordinates. Very rusted, but still very much intact.

Documented History (by the NGS)

01/01/1945 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1945 IN LITCHFIELD PARK. AT LITCHFIELD PARK, MARICOPA COUNTY, 0.5 MILE NORTH ALONG A COUNTY ROAD FROM THE POST OFFICE, AT THE JUNCTION OF A PRIVATE ROAD LEADING WEST, 4.3 FEET SOUTH OF THE SOUTH CURB OF THE PRIVATE ROAD, 4.6 FEET WEST OF THE WEST CURB OF THE MAIN ROAD, AND 1.3 FEET NORTH OF A WHITE WOODEN WITNESS POST. AN IRON BENCH MARK DISK, STAMPED T 258 1945 AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.4 FOOT ABOVE GROUND.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • 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 geoid height was determined by GEOID99.

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