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Details for Benchmark: CH0128

N 31° 56.533 W 113° 00.700 (NAD 83)

Altitude: 1133.3

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

Location:
In PIMA county, AZ View Original Datasheet
Designation:
Z 307
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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Documented History (by the NGS)

1/1/1952 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1952 15.0 MI NW FROM LUKEVILLE. 0.95 MILES NORTH ALONG THE SONOYTA-AJO HIGHWAY FROM THE POST OFFICE AND STORE AT LUKEVILLE TO ROAD JUNCTION, THENCE 14.05 MILES WEST TO QUITOVOQUITO, 1.0 MILE NORTHWEST OF A 308, AT THE Y JUNCTION OF THE ROAD LEADING FROM QUITOVOQUITO TO BATES WELL AND AJO AND THE ROAD LEADING EAST TO SONOYTA, 74 FEET SOUTH OF THE CENTERLINE OF AJO ROAD, 64 FEET SOUTHWEST OF THE CENTERLINE OF THE SONOYTA ROAD, 2.3 FEET NORTH OF THE WITNESS POST, IN A CONCRETE POST PROJECTING 0.5 FOOT, AND ABOUT 2 1/2 FEET HIGHER THAN THE ROAD.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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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