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Details for Benchmark: CH0079

N 31° 54.800 W 112° 48.467 (NAD 83)

Altitude: 1537.6

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

Location:
In PIMA county, AZ View Original Datasheet
Designation:
1537.14
Marker Type:
survey 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)

Unknown by USDA (MONUMENTED)
01/01/1953 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1953 2.4 MI N FROM LUKEVILLE. 2.4 MILES NORTH ALONG THE SONOYTA-AJO HIGHWAY FROM THE POST OFFICE AT LUKEVILLE, 49 1/2 FEET SOUTHEAST OF THE CENTER LINE OF THE HIGHWAY, 1.5 FEET NORTH OF A WITNESS POST, ABOUT 1 FOOT LOWER THAN THE HIGHWAY, AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.3 FOOT ABOVE THE GROUND.
01/01/1981 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1981 RECOVERED IN GOOD CONDITION.
11/10/1994 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1994 RECOVERED IN GOOD CONDITION.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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