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Details for Benchmark: CZ1024

N 32° 49.833 W 111° 40.933 (NAD 83)

Altitude: 1459.22

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

Location:
In PINAL county, AZ View Original Datasheet
Designation:
N 278
Marker Type:
bench mark disk
Setting:
abutments and piers of large bridges
Stability:
Probably hold position/elevation well.

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A 2nd set of tracks has been added to this right-of-way, and it seems that the culvert has been rebuilt and expanded where this mark is/was.

Recovered in good condition

[Photos:]
photoN 278 CZ1024
photoCZ1024

found in good condition.

[Photos:]
photoCZ1024 N 278.JPG
photoCZ1024 N 278 looking east.JPG
photoCZ1024 N 278 looking north.JPG
photoCZ1024 N 278 looking south.JPG
photoCZ1024 N 278 w gpsr.JPG

Recovered as described.
GPS (HH2) co-ordinates N32 49.833º' W111º40.939'.

[This entry was edited by AZcachemeister on Saturday, August 01, 2009 at 6:58:45 AM.]

[Photos:]
photoN 278 / CZ1024
Back-up camera not so good.

Documented History (by the NGS)

1/1/1948 by CGS (MONUMENTED)
1/1/1967 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1967 5.3 MI SE FROM CASA GRANDE. ABOUT 5.3 MILES SOUTHEAST ALONG THE SOUTHERN PACIFIC RAILROAD FROM THE STATION AT CASA GRANDE, IN S 12, T 7 S, R 6 E, 0.25 MILE SOUTHEAST OF THE INTERSTATE HIGHWAY 10 OVERPASS FOR THE RAILROAD, 3 POLES SOUTHEAST OF MILEPOST 924, 6 FEET NORTHEAST OF THE NORTHEAST RAIL OF THE TRACK, SET IN THE TOP OF THE NORTHEAST END OF THE NORTHWEST CONCRETE ABUTMENT OF RAILROAD BRIDGE NUMBER 924.10, 70 FEET WEST OF THE 3RD POLE SOUTHEAST OF THE MILEPOST, AND ABOUT 2 FEET BELOW THE LEVEL OF THE TRACKS.
1/1/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 RECOVERED IN GOOD CONDITION.
1/1/1980 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1980 RECOVERED IN GOOD CONDITION.
1/1/1984 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1984 RECOVERED IN GOOD CONDITION.
12/5/1991 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1991 9.0 KM (5.60 MI) SOUTHEASTERLY ALONG STATE HIGHWAY 84 FROM THE JUNCTION OF STATE HIGHWAYS 93 (PINAL AVENUE) AND 287 (FLORENCE BOULEVARD) IN CASA GRANDE, IN TOP OF AND 1.8 M (5.9 FT) SOUTHWEST OF THE NORTHEAST END OF THE NORTHWEST CONCRETE ABUTMENT OF SOUTHERN PACIFIC RAILROAD BRIDGE NUMBER 924.10, 39.0 M (128.0 FT) SOUTHWEST OF THE HIGHWAY CENTERLINE, 1.9 M (6.2 FT) NORTHEAST OF THE NEAR RAIL, AND 0.6 M (2.0 FT) BELOW THE LEVEL OF THE HIGHWAY.

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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