Details for Benchmark: CH0096

N 31° 54.700 W 112° 55.100 (NAD 83)

Altitude: 1276.6

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

Location:
In PIMA county, AZ View Original Datasheet
Designation:
L 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 8.45 MI NW FROM LUKEVILLE. 0.95 MILE NORTH ALONG THE SONOYTA-AJO HIGHWAY FROM THE POST OFFICE AT LUKEVILLE AT JUNCTION, THENCE 7.5 MILES WEST ALONG THE QUITOVOQUITO ROAD, 249 FEET NORTHEAST OF THE U. S.-MEXICAN FENCE LINE, 90 FEET SOUTHEAST OF THE CENTER OF A SMALL WASH, 71 1/2 FEET NORTHWEST OF THE CENTER OF A SMALL WASH, 43 1/2 FEET SOUTHWEST OF THE CENTERLINE OF THE ROAD, 2.5 FEET NORTH OF THE WITNESS POST, IN A CONCRETE POST PROJECTING 0.3 FEET 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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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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