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Details for Benchmark: DU1499

N 33° 23.600 W 111° 30.833 (NAD 83)

Altitude: 1712.28

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

Location:
In PINAL county, AZ View Original Datasheet
Designation:
HWY 60 STA 966+71
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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Hi! Nana18 signed me in for a benchmark challenge and so I figure that I should find a few. This was one of them. I also found another benchmark, 1709.52 970.75, but can't seem to find its listing.

[Photos:]
photoDU1499 966+71

With Nana18 on a benchmark quest! Mud - not good for manicures! Thanks.

Finding benchmarks with T2D. In good shape.

[Photos:]
photoDU1499
Disk Looking east
photo

Found in good shape.

[Photos:]
photoDU1499
photoDU1499 w GPSr
photoDU1499 Area
N 33° 23.639 W 111° 30.849

It's in great shape...but the coordinates are a bit off.

This entry was edited by migeocache on Thursday, 03 February 2011 at 08:59:42.

[Photos:]
photo966+71 Closeup
photo966+71 Vicinity Looking Southwest

Found it in good shape..

[Photos:]
photoDU1499

Recovered as described, in good condition.

[Photos:]
photoHWY 60 STA 966+71 / DU1499
A close-up of the mark w/GPSr.
photoHWY 60 STA 966+71 / DU1499
A close-up of the mark alone.

Documented History (by the NGS)

Unknown by AZDT (MONUMENTED)
01/01/1975 by AZDT (GOOD)
DESCRIBED BY ARIZONA DEPARTMENT OF TRANSPORTATION 1975 1.6 MI SE FROM PALM SPRINGS. FROM MILEPOST 198, U.S. 60, 70, AND 80, EAST ON THE HIGHWAY FOR 0.35 MILES AND TO THE STATION ON THE RIGHT. ON A CONCRETE CULVERT HEADWALL, SOUTH OF THE EAST BOUND LANE. AN AHD BRASS CAP, SET IN A CONCRETE CULVERT HEADWALL.
01/01/1984 by AZDT (GOOD)
RECOVERY NOTE BY ARIZONA DEPARTMENT OF TRANSPORTATION 1984 RECOVERED IN GOOD CONDITION. NEW TO REACH FOLLOWS. 4.17 KM. (2.59 MI.) SOUTHEAST ALONG U.S. HIGHWAY 60 FROM THE JUNCTION OF STATE HIGHWAY 88 AT APACHE JUNCTION TO THE STATION ON THE RIGHT.

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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