Details for Benchmark: CH0098

N 31° 55.200 W 112° 56.783 (NAD 83)

Altitude: 1218.4

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

Location:
In PIMA county, AZ View Original Datasheet
Designation:
N 308
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 10.35 MI NW FROM LUKEVILLE. 0.95 MILE NORTH ALONG THE SONOYTA-AJO HIGHWAY FROM THE POST OFFICE AT LUKEVILLE TO JUNCTION, THENCE 9.4 MILES WEST ALONG THE QUITOVOQUITO ROAD, 199 FEET NORTH AND ACROSS THE MAIN ROAD FROM THE U. S. - MEXICAN FENCE LINE, 68 FEET SOUTH OF THE CENTER OF A SMALL WASH, 50 FEET NORTH OF THE CENTERLINE OF THE ROAD, 2.3 FEET WEST OF THE WITNESS POST, IN A CONCRETE POST PROJECTING 0.3 FOOT, AND ABOUT LEVEL WITH 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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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