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Details for Benchmark: CZ1030

N 32° 48.183 W 111° 38.250 (NAD 83)

Altitude: 1495

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

Location:
In PINAL county, AZ View Original Datasheet
Designation:
ROUTE 84 STA 3557+90
Marker Type:
survey disk
Setting:
retaining walls, concrete ledge, etc.
Stability:
May hold, but of type commonly subject to surface motion.

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found in good condition

[Photos:]
photocz1030 marker

Recovered as described, in good condition.

[Photos:]
photoROUTE 84 STA 3557+90 / CZ1030
A close-up of the mark, with the GPSr.
photoROUTE 84 STA 3557+90 / CZ1030
A close-up of the mark alone.
photoROUTE 84 STA 3557+90 / CZ1030
A view to the west, and a train standing along the nearby tracks.

Documented History (by the NGS)

Unknown by AZHD (MONUMENTED)
01/01/1967 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1967 6.0 MI NW FROM ELOY. ABOUT 6.0 MILES NORTHWEST ALONG THE SOUTHERN PACIFIC RAILROAD FROM THE STATION AT ELOY, OR ABOUT 8.5 MILES SOUTHEAST ALONG THE SOUTHERN PACIFIC RAILROAD FROM THE STATION AT CASA GRANDE, IN S 20, T 7 S, R 7 E, 8 1/2 POLES SOUTHEAST OF MILEPOST NUMBER 927, 93 1/2 FEET NORTHEAST OF THE NORTHEAST RAIL OF THE NORTHEAST SET OF TRACKS, 25 FEET SOUTHWEST OF THE CENTER LINE OF STATE HIGHWAY 84, SET IN THE CENTER OF THE TOP OF THE SOUTHWEST HEAD WALL OF A LARGE CONCRETE CULVERT UNDER THE HIGHWAY, AND ABOUT LEVEL WITH THE HIGHWAY.
01/01/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 THE MARK IS ABOVE LEVEL WITH THE HIGHWAY. 13.7 KILOMETERS (8.5 MILES) SOUTHEAST ALONG THE SOUTHERN PACIFIC RAILROAD FROM THE STATION AT CASA GRANDE, 8-1/2 POLES (0.5 KILOMETER- 0.3 MILE) SOUTHEAST OF RAILROAD MILE POST 927, 0.2 KILOMETER (0.1 MILE) NORTHWEST OF THE Y-JUNCTION OF STATE HIGHWAY 84 AND TOLTEC BUTTES ROAD, SET IN THE TOP CENTER OF THE SOUTHWEST HEADWALL FOR A BOX CULVERT UNDER THE HIGHWAY, 28.5 METERS (94 FEET) NORTHEAST OF THE NORTHEAST RAIL OF THE NORTHEAST TRACKS AND 7.6 METERS (25 FEET) SOUTHWEST OF THE HIGHWAY CENTERLINE.
01/01/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 THE MARK IS ABOVE LEVEL WITH THE HIGHWAY. 13.7 KILOMETERS (8.5 MILES) SOUTHEAST ALONG THE SOUTHERN PACIFIC RAILROAD FROM THE STATION AT CASA GRANDE, 8-1/2 POLES (0.5 KILOMETER- 0.3 MILE) SOUTHEAST OF RAILROAD MILE POST 927, 0.2 KILOMETER (0.1 MILE) NORTHWEST OF THE Y-JUNCTION OF STATE HIGHWAY 84 AND TOLTEC BUTTES ROAD, SET IN THE TOP CENTER OF THE SOUTHWEST HEADWALL FOR A BOX CULVERT UNDER THE HIGHWAY, 28.5 METERS (94 FEET) NORTHEAST OF THE NORTHEAST RAIL OF THE NORTHEAST TRACKS AND 7.6 METERS (25 FEET) SOUTHWEST OF THE HIGHWAY CENTERLINE.
01/01/1984 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1984 RECOVERED IN GOOD CONDITION.
12/05/1991 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1991 0.3 KM (0.20 MI) SOUTHERLY ALONG MAIN STREET FROM THE POST OFFICE IN ELOY, THENCE 9.7 KM (6.00 MI) NORTHWESTERLY ALONG STATE HIGHWAY 84, IN TOP OF AND 1.7 M (5.6 FT) SOUTHEAST OF THE NORTHWEST END OF THE SOUTHWEST CONCRETE HEADWALL OF A CULVERT, AND 7.8 M (25.6 FT) SOUTHWEST OF AND LEVEL WITH THE HIGHWAY CENTERLINE.

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 November 1993.
  • 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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