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Details for Benchmark: DV1257

N 33° 38.509 W 112° 06.995 (NAD 83)

Altitude: 1335.93

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

Location:
In MARICOPA county, AZ View Original Datasheet
Designation:
BELL 2
Marker Type:
triangulation station disk
Setting:
set into the top of a prefabricated concrete post imbedded in the ground
Stability:
Mark of questionable or unknown stability.

Reference Points

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Finally located this one, might have been easier in the daylight. This Benchmark now has a bush growing over it, making it difficult to find, but it is still there.

found under dirt about 1 foot south of orange stake.
My coordinates were N33 38.511 W112 06.997

[Photos:]
photoclose-up of benchmark
photogps and benchmark
photolooking north

Found benchmark today in good condition.

[Photos:]
photoBenchmark with GPS
photoWide view looking south

The Benchmark is in good shape.

[Photos:]
photoDV1257
photoDV1257
photoDV1257

Drove right up to the area.

Found for Day 12 of Trifecta Challenge (Geocache: GC178R7, Benchmark: DV1257 and Waymark: WM1EHE).

[Photos:]
photoDV1257 wGPSr

Recovered station BELL 2 in good condition. There is now an orange carsonite witness post approximately one foot north of the station, which is now approximately 2 inches below grade. Reference marks not searched for.

[Photos:]
photoDV1257 BELL 2 closeup
photoDV1257 BELL 2 wide shot looking north
photoWith the GPSr

Found this one while running around! I have a DeLorme PN-40 which showed 7 feet off from listed coordinates. Stake in ground and starting to break.

Found this one on a lazy Sunday with no kids.

[Photos:]
photoThe Mark.
photoThe view North.
photoThe view South.

Recovered as described, in good condition.

[Photos:]
photoBELL 2 / DV1257
A close-up of the mark, with the GPSr.
photoBELL 2 / DV1257
A close-up of the mark alone.
photoBELL 2 / DV1257
A wide view of the general area, looking north.

First one I searched for. Have picture confirmation but not sure how to attach it.

OK - Now I know how :)

[Photos:]
photoDV1257

We were out for a bike ride and found this bench mark.

[Photos:]
photoLocal Area Closeup
photoLocal Area Longshot
photoBell 2 Details

Documented History (by the NGS)

01/01/1963 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1963 (CAA) STATION IS LOCATED ABOUT 13 MILES NORTH OF THE CENTER OF PHOENIX, ABOUT 3 MILES SOUTH OF THE VILLAGE OF ADOBE AND ON THE WEST SIDE OF STATE HIGHWAY 69. TO REACH THE STATION FROM THE INTERSECTION OF WEST CAMELBACK ROAD AND BLACK CANYON HIGHWAY IN PHOENIX, GO NORTH ON BLACK CANYON HIGHWAY (STATE HIGHWAY 69) FOR 8.7 MILES TO WEST BALL ROAD, CONTINUE NORTH ON STATE HIGHWAY 69 FOR 0.15 MILE TO STATION ON LEFT AS DESCRIBED. STATION MARK, A STANDARD TRIANGULATION DISK STAMPED BELL 2 1963, IS SET IN THE TOP OF A CONCRETE CYLINDER WHICH IS SET FLUSH WITH THE SURFACE OF THE GROUND. THE MARK IS 322 FEET NORTH OF THE CENTER OF A GRAVEL ROAD, 271 FEET WEST OF THE WEST EDGE OF STATE HIGHWAY 69, 170 FEET WEST OF ROAD SIGN PANCAKE HOUSE AND 1.5 FEET SOUTH OF THE WITNESS POST. REFERENCE MARK 3, A STANDARD REFERENCE DISK STAMPED BELL 2 NO. 3 1963, IS SET IN THE TOP OF A CONCRETE CYLINDER WHICH IS SET FLUSH WITH THE SURFACE OF THE GROUND. THE MARK IS 357 FEET NORTH OF THE CENTER OF BLADED ROAD, 256 FEET WEST OF THE WEST EDGE OF STATE HIGHWAY 69 AND 35 FEET NORTH OF THE WITNESS POST. REFERENCE MARK 4, A STANDARD REFERENCE DISK STAMPED BELL 2 NO 4 1963, IS SET IN THE TOP OF A CONCRETE CYLINDER WHICH IS SET FLUSH WITH THE SURFACE OF THE GROUND. THE MARK IS 288 FEET NORTH OF THE CENTER OF BLADED ROAD, 283 FEET WEST OF THE WEST EDGE OF STATE HIGHWAY 69 AND 38.5 FEET SOUTH OF THE WITNESS POST. AZIMUTH MARK, A STANDARD AZIMUTH DISK STAMPED BELL 1959, IS SET IN THE TOP OF A CONCRETE CYLNDER WHICH PROJECTS ABOUT 4 INCHES ABOVE THE GROUND. THE MARK IS 49 FEET NORTHEAST OF THE CENTER OF A IRRIGATION WATER PUMP, 43 FEET SOUTH OF THE CENTER OF WEST BELL ROAD, 21.5 FEET SOUTHEAST OF EAST POLE OF DOUBLE POWER POLES WITH 3 TRANSFORMERS, 14 FEET WEST OF THE CENTER OF DRIVE AND 2 FEET WEST OF THE WITNESS POST. HEIGHT OF LIGHT ABOVE STATION MARK 1 METER.
01/01/1963 by CGS (GOOD)
RECOVERY NOTE BY COAST AND GEODETIC SURVEY 1963 (CAA) THE STATION WAS RECOVERED AS DESCRIBED AND ALL MARKS WERE FOUND TO BE IN GOOD CONDITION. THE DISTANCE AND DIRECTION TO THE REFERENCE MARKS WERE CHECKED AND FOUND TO BE CORRECT. THE 1963 DESCRIPTION SUBMITTED EARLIER IS ADEQUATE.
01/01/1970 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1970 (LFS) THE STATION MARK, REFERENCE MARK 3 AND THE AZIMUTH MARK WERE RECOVERED. REFERENCE MARK 4 HAS BEEN DESTROYED. THE AZIMUTH MARK WOULD NOT SEE THE STATION DUE TO DEVELOPMENT IN THE AREA. AZIMUTH MARK NO. 2 AND REFERENCE MARK NO. 5 WERE ESTABLISHED AT THIS TIME. THE STATION IS LOCATED ABOUT 13 MILES NORTH OF THE CENTER OF PHOENIX AND ABOUT 0.05 MILE WEST OF INTERSTATE HIGHWAY 17 AT THE BELL ROAD INTERCHANGE. TO REACH THE STATION FROM INTERSTATE HIGHWAY 17 AND BELL ROAD, GO WEST ALONG BELL ROAD FOR ABOUT 0.1 MILE TO THE WEST FRONTAGE ROAD. TURN RIGHT ALONG A DIRT ROAD WHICH PARALLELS THIS ONE WAY STREET FOR 0.1 MILE TO THE STATION ON THE RIGHT. THE STATION MARK IS A STANDARD DISK STAMPED, BELL 2 1963. IT IS SET IN THE TOP OF A 12 INCH ROUND CONCRETE MONUMENT, WHICH PROJECTS 1/2 INCH. IT IS 211 FEET NORTHEAST OF POWER POLE 30T PS62947. 193 FEET EAST OF A POWER POLE WITH A TRANSFORMER, 114-1/2 FEET SOUTH OF HIGHWAY RIGHT OF WAY STATION 648+00 WHICH IS MARKED WITH A WHITE ANGLE IRON THAT PROJECTS 2 FEET, 26 FEET WEST OF THE FRONTAGE ROAD AND 2 FEET SOUTH OF THE WITNESS POST. REFERENCE MARK 3, IS A STANDARD DISK STAMPED, BELL 2 NO 3 1963. IT IS SET IN THE TOP OF A 12 INCH ROUND CONCRETE MONUMENT FLUSH WITH THE GROUND. IT IS 79-1/2 FEET SOUTH-SOUTHWEST OF HIGHWAY STATION 648+00, 38 FEET WEST OF THE CENTER OF THE FRONTAGE ROAD AND 37-1/2 FEET NORTH OF THE WITNESS POST. REFERENCE MARK 5, IS A STANDARD DISK STAMPED, BELL 2 1963 NO 5 1970. IT IS SET IN A DRILL HOLE IN THE EAST HEADWALL OF A 6 FOOT DRAINAGE DITCH. IT IS 58 FEET EAST OF THE WITNESS POST AND 30 FEET EAST OF THE CENTER OF THE WEST FRONTAGE ROAD. AZIMUTH MARK IS A STANDARD DISK SET IN TOP OF A 12 INCH ROUND CONCRETE MONUMENT AND STAMPED, BELL 1959. 0.5 MILE EAST ALONG BELL ROAD FROM INTERSTATE 17, 18 FEET NORTHEAST OF A 20 FOOT STAND PIPE, 43 FEET SOUTH OF CENTER LINE OF EAST BELL ROAD AND 2 FEET WEST OF WITNESS POST. AZIMUTH MARK NO. 2, IS A STANDARD DISK STAMPED, BELL 2 1963 NO 2 1970. IT IS SET IN A DRILL HOLE IN THE CONCRETE BASE OF THE FIRST LAMP POLE SOUTH OF THE BRIDGE OVER BELL ROAD, 78 PACES SOUTH OF THE SOUTHWEST CORNER OF THE BRIDGE AND ABOUT 15 FEET WEST OF THE CENTER OF THE EXIT LANE. AIRLINE DISTANCE AND DIRECTION FROM NEAREST TOWN--ABOUT 13 MILES NORTH OF PHOENIX.
01/01/1981 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1981 18.4 KM (11.45 MI) NORT FROM PHOENIX. 18.4 KM (11.45 MI) NORTH ALONG INTERSTATE HIGHWAY 17 FROM THE INTERSECTION OF GRAND AVENUE AT PHOENIX, 0.25 KM (0.15 MI) NORTH OF BELL ROAD, 0.2 KM (0.1 MI) WEST OF INTERSTATE 17, AT THE SOUTHWEST END OF A CURVE IN THE WEST FRONTAGE ROAD, 6.9 METERS (22.6 FT ) NORTHWEST OF THE CENTERLINE OF THE WEST FRONTAGE ROAD, 42.4 METERS (139 FT) SOUTHWEST OF THE CENTERLINE OF THE NORTHEAST DRIVEWAY TO A VERY SMALL TRAILER PARK, 31.5 METERS (103.5 FT) NORTHEAST OF THE CENTERLINE OF THE SOUTHWEST DRIVEWAY TO THE TRAILER PARK, 2.4 METERS (7.9 FT) SOUTHEAST OF A CHAIN LINK FENCE. THE MARK IS 2.2 METERS SE FROM A WITNESS POST. THE MARK IS 0.6 M BELOW THE FRONTAGE ROAD.
01/24/1997 by ATEAM (GOOD)
RECOVERY NOTE BY A TEAM PA INC 1997 (WRK) RECOVERED AS DESCRIBED IN NOTE OF 1962

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in November 1997.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • 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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