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Details for Benchmark: CZ0486

N 32° 28.733 W 111° 14.350 (NAD 83)

Altitude: 1956.63

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

Location:
In PIMA county, AZ View Original Datasheet
Designation:
108+87.3
Marker Type:
survey disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Found in good shape.

[Photos:]
photoCZ0486
photoCZ0486 w GPSr

found on a benchmarking tour with Carmel

[Photos:]
photo108+87.3

Recovered on a run for some benchmarks.

[Photos:]
photoCZ0486
N 32° 28.750 W 111° 14.357

Found in good shape today.

[Photos:]
photoBM 108 87.3

Found in good condition, as described.

[Photos:]
photoCZ0486

Recovered as described, in good condition.

[Photos:]
photo108+87.3 / CZ0486
A close-up of the mark.

REOCVERED IN GOOD CONDITION

[Photos:]
photoDISK
BM DISK
photoSETTING
THE DISK IS SET IN THE CONCRETE HEADWALL OF A CULVERT UNDER THE WESTBOUND FRONTAGE ROAD OF INTERSTATE 10

Documented History (by the NGS)

1/1/1931 by AZHD (MONUMENTED)
1/1/1951 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1951 2.1 MI NW FROM MARANA. 2.1 MILES NORTHWEST ALONG STATE HIGHWAY 84 AND SOUTHERN PACIFIC RAILROAD FROM THE POST OFFICE AT MARANA, AT RAILROAD MILEAGE NUMBER 959.87, AND RAILROAD SEMAPHORE SIGNAL NUMBER 9598, AND IN THE TOP OF THE APPROXIMATE CENTER OF THE CONCRETE CURBING OF THE HIGHWAY BRIDGE, 36 1/2 FEET NORTHWEST OF TELEGRAPH POLE NUMBER 11775, 16 FEET NORTHEAST OF THE CENTER LINE OF THE NORTHWEST BOUND TRAFFIC LANE OF THE HIGHWAY, AND ABOUT 1 FOOT HIGHER THAN THE HIGHWAY.
1/1/1960 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1960 RECOVERED IN GOOD CONDITION.
1/1/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 38.8 KILOMETERS (24.1 MILES) NORTHWEST ALONG THE SOUTHERN PACIFIC COMPANY RAILROAD FROM THE STATION AT TUCSON, 0.2 KILOMETER (0.1 MILE) NORTHWEST OF MILE POST NUMBER 960, AT RAILROAD MILEAGE 959.87, AT A FRONTAGE ROAD FIVE CHANNEL CONCRETE BRIDGE, SET IN THE TOP OF THE CENTER OF THE NORTHEAST HEADWALL, 8.75 METERS (28.7 FEET) NORTHWEST OF THE SOUTHEAST END, 35.8 METERS (117.6 FEET) SOUTHWEST OF THE SOUTHWEST RAIL, 4.9 METERS (16.0 FEET) NORTHEAST OF THE CENTERLINE OF THE ROAD. THE MARK IS 0.3 M ABOVE THE ROAD.
2/4/1996 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1996 RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (G = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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