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Details for Benchmark: DV1700

N 33° 29.050 W 112° 16.350 (NAD 83)

Altitude: 1031.12

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

Location:
In MARICOPA county, AZ View Original Datasheet
Designation:
417 C
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Tried to locate with Tausert. We found the canal headgate as described (but about 200 feet north of the coordinates), and found an SRP aluminum disk on the WEST headwall (stamped GRA 6-98 2E 7.4N) but did not find the AZDOT disk. After checking AZCachemeister's photo, I believe it was buried under gravel on the EAST headwall. Oh, duh!

Recovered as described, in good condition.

[Photos:]
photo417 C / DV1700
A close-up of the mark w/GPSr.
photo417 C / DV1700
A close-up of the mark alone.

Documented History (by the NGS)

01/01/1982 by AZDT (MONUMENTED)
DESCRIBED BY ARIZONA DEPARTMENT OF TRANSPORTATION 1982 IN TOLLESON. IN TOLLESON, FROM THE INTERSECTION OF INTERSTATE 10 TRAVEL NORTH ALONG 99TH AVENUE FOR 1.65 MI (2.66 KM) TO STATION ON LEFT, 27.5 FT (8.38 METERS) WEST OF THE CENTERLINE OF 99TH AVENUE, ON THE EAST SIDE OF A NORTH-SOUTH CANAL, A STANDARD AZDT ALUMINIUM CAP EPOXIED ON CANAL HEADGATE.

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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