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Details for Benchmark: CZ0331

N 32° 42.150 W 111° 28.633 (NAD 83)

Altitude: 1637.66

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

Location:
In PINAL county, AZ View Original Datasheet
Designation:
E 279
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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found in good shape.

[Photos:]
photoCZ0331
photoCZ0331 w GPSr

Recovered in good condition. GPS (HH2) co-ordinates N32 Deg 42.168' W111 Deg 28.626 '. All ties other than those to the southwest rail and the road centerline have been removed. Due to re-grading, the mark is at or near grade level.

[Photos:]
photoE 279 / CZ0331
A close-up of the mark, with the GPSr.
photoE 279 / CZ0331
A close-up of the mark alone.
photoE 279 / CZ0331
A wide view of the general area, looking southeast.

Recovered in good condition. Handheld GPSr indicated coordinates of N 32 42 10.0 W 111 28 37.5 (DMS). The railroad right of way is currently being regraded around the monument and when completed the mark will likely be at or near grade level.

[Photos:]
photoCZ0331 E 279 closeup
photoCZ0331 E 279 wide shot looking NE
photoWith the GPSr
N 32° 42.168 W 111° 28.625

Bench Mark E 279 was recovered as described, in good condition.

[Photos:]
photoCZ0331 20050703 G
Bench Mark E 279 w/GPSr.
photoCZ0331 20050703 C
Bench Mark E 279.
photoCZ0331 20050703 B
Bench Mark E 279 from Eye Level.
photoCZ0331 20050703 A1 N
North at Bench Mark E 279.
photoCZ0331 20050703 A2 E
East at Bench Mark E 279.

Documented History (by the NGS)

01/01/1948 by CGS (MONUMENTED)
01/01/1967 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1967 1.5 MI SE FROM PICACHO. ABOUT 1.5 MILES SOUTHEAST ALONG THE SOUTHERN PACIFIC RAILROAD FROM THE DISTRICT 33 ELEMENTARY SCHOOL AT PICACHO, IN SECTION 25, T 8 S, R 8 E, 4 POLES NORTHWEST OF A RAILROAD SIGNAL BOX, 50 FEET SOUTHWEST OF THE SOUTHWEST RAIL OF THE TRACKS, 79 1/2 FEET NORTHEAST OF THE CENTER LINE OF OLD STATE HIGHWAY 84 WHICH IS NOW A FRONTAGE ROAD ALONG THE NORTHEAST SIDE OF INTERSTATE HIGHWAY 10, 6 FEET SOUTHEAST OF A TELEPHONE POLE, 2.3 FEET NORTHWEST OF A WOODEN WITNESS POST, ABOUT 4 FEET BELOW THE LEVEL OF THE TRACKS, AND SET IN THE TOP OF A CONCRETE POST WHICH PROJECTS 6 INCHES.
01/01/1968 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1968 RECOVERED IN GOOD CONDITION.
01/01/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 THE MARK IS 1.2 M BELOW THE TRACKS. 32.3 KILOMETERS (20.1 MILES) SOUTHEAST ALONG THE SOUTHERN PACIFIC RAILROAD FROM THE STATION AT CASA GRANDE, AT THE THIRD TELEGRAPH POLE NORTHWEST OF MILE POST 939, 0.4 KILOMETER (0.25 MILE) SOUTHEAST OF RAILROAD BRIDGE 938.69, 15.25 METERS (50 FEET) SOUTHWEST OF THE SOUTHWEST RAIL, 112.8 METERS (370 FEET) NORTHWEST OF AND ACROSS THE TRACKS FROM THE MILE POST, 24.2 METERS (80 FEET) NORTHEAST OF THE CENTERLINE OF THE FRONTAGE ROAD (OLD HIGHWAY 84) AND 1.8 METERS (6 FEET) SOUTHEAST OF THE TELEGRAPH POLE. THE MARK IS 0.4 METERS NW FROM A WITNESS POST.
01/01/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 THE MARK IS 1.2 M BELOW THE TRACKS. 32.3 KILOMETERS (20.1 MILES) SOUTHEAST ALONG THE SOUTHERN PACIFIC RAILROAD FROM THE STATION AT CASA GRANDE, AT THE THIRD TELEGRAPH POLE NORTHWEST OF MILE POST 939, 0.4 KILOMETER (0.25 MILE) SOUTHEAST OF RAILROAD BRIDGE 938.69, 15.25 METERS (50 FEET) SOUTHWEST OF THE SOUTHWEST RAIL, 112.8 METERS (370 FEET) NORTHWEST OF AND ACROSS THE TRACKS FROM THE MILE POST, 24.2 METERS (80 FEET) NORTHEAST OF THE CENTERLINE OF THE FRONTAGE ROAD (OLD HIGHWAY 84) AND 1.8 METERS (6 FEET) SOUTHEAST OF THE TELEGRAPH POLE. THE MARK IS 0.4 METERS NW FROM A WITNESS POST.
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 2.3 KM (1.40 MI) SOUTHEASTERLY ALONG CAMINO ADELANTE ROAD FROM THE POST OFFICE IN PICACHO, 41.9 M (137.5 FT) NORTH OF BENCH MARK A 509, 24.1 M (79.1 FT) NORTHEAST OF AND LEVEL WITH THE ROAD CENTERLINE, 15.3 M (50.2 FT) SOUTHWEST OF THE NEAR RAIL OF THE SOUTHERN PACIFIC RAILROAD, 9.8 M (32.2 FT) EAST OF AN UNDERGROUND PIPELINE WARNING SIGN, 1.9 M (6.2 FT) SOUTHEAST OF A UTILITY POLE, 0.5 M (1.6 FT) NORTHWEST OF A WITNESS POST, AND THE MONUMENT PROJECTS 0.2 M (0.7 FT) ABOVE THE GROUND SURFACE.

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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