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Details for Benchmark: DA1576

N 32° 46.065 W 112° 49.084 (NAD 83)

Altitude: 1017.3

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

Location:
In MARICOPA county, AZ View Original Datasheet
Designation:
WHITE
Marker Type:
survey disk
Setting:
set into the top of a round concrete monument
Stability:

Reference Points

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Found in good shape.

[Photos:]
photoDA1576
photoDA1576 w GPSr
photoDA1576 Area

Recovered as described, in good condition.

[Photos:]
photoWHITE / DA1576
A close-up of the mark, with the GPSr.
photoWHITE / DA1576
A close-up of the mark alone.
photoWHITE / DA1576
A wide view of the general area, looking southwest from near RM 1.
photoWHITE / DA1576
A close-up of RM 1.

Documented History (by the NGS)

01/01/1975 by AZDT (MONUMENTED)
DESCRIBED BY ARIZONA DEPARTMENT OF TRANSPORTATION 1975 (TT) THE STATION IS LOCATED ABOUT 13.8 MILES SOUTHWEST OF GILA BEND ALONG THE WEST RIGHT-OF-WAY OF STATE ROUTE 85. THE STATION IS ADOT HIGHWAY DIVISION DISK STAMPED WHITE P AND M GS 1975 AND IS SET IN A 10 INCH CONCRETE MONUMENT PROJECTING 0.3 FEET. THE STATION IS 143 FEET WEST OF THE CENTERLINE OF STATE ROUTE 85, 57 FEET EAST OF THE WEST RIGHT-OF-WAY FENCE LINE, 3.1 FEET EAST OF A WITNESS POST AND 81 FEET SOUTHEAST OF UTILITY POLE 141. REFERENCE MARK 1 IS AN ADOT HIGHWAY DIVISION DISK STAMPED RM 1 1975 AND IS SET IN A 10 INCH CONCRETE MONUMENT. THE MARK IS LOCATED IN THE WEST RIGHT-OF-WAY ALONG STATE ROUTE 85 63.4 FEET EAST OF A RIGHT-OF-WAY FENCE, 44.8 FEET NORTH OF A WITNESS POST AND 136.7 FEET WEST OF CENTERLINE OF HIGHWAY. REFERENCE MARK 2 IS AN A.H.D. DISK SET IN A 6 X 6 INCH CONCRETE MONUMENT STAMPED 1475+83.03 1960 AND PROJECTS 7 INCHES. THE MARK IS AT THE WEST RIGHT-OF-WAY FENCE LINE, 2.5 FEET NORTH OF A RIGHT-OF-WAY ANGLE IRON MARKER PAINTED WHITE, 56.3 FEET WEST OF A WITNESS POST, 52.7 FEET SOUTH OF UTILITY POLE 141 AND 200 FEET WEST OF HWY. CENTERLINE. TO REACH THE STATION FROM MARTIN AVE AND U.S. HIGHWAY 80 IN GILA BEND, GO WEST ON U.S. 80 FOR 0.91 MILES TO THE AJO-STATE ROUTE 85 TURNOFF. TURN RIGHT AND FOLLOW RAMP UNDER U.S. I-8 OVERPASS, CONTINUE ON STATE ROUTE 85 TO MILE POST 13.9 (13.4 MILES) AND STATION IN THE WEST RIGHT-OF-WAY MARKED BY A WITNESS POST. HEIGHT OF LIGHT ABOVE STATION MARK 1.5 METERS.
02/16/1997 by USPSQD (GOOD)
RECOVERY NOTE BY US POWER SQUADRON 1997 RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in August 1993.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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