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Details for Benchmark: CG0849

N 31° 58.671 W 110° 13.574 (NAD 83)

Altitude: 3777.23

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

Location:
In COCHISE county, AZ View Original Datasheet
Designation:
M 430
Marker Type:
flange-encased rod
Setting:
stainless steel rod in sleve
Stability:
Most reliable and expected to hold position/elevation well.

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Found it

Found it.

N 31° 53.672 W 110° 13.573

Found in good shape, as described.

[Photos:]
photoCG0849

Found by chance after finding nearby marker on bridge. Good condition.

[Photos:]
photoCG0849 location
taken from frontage road looking at I-10
photoCG0849 marker open

Documented History (by the NGS)

01/01/1979 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1979 8.4 KM EAST FROM BENSON. THE MARK IS ABOVE LEVEL WITH EASTBOUND LANES OF HIGHWA. 8.4 KILOMETERS (5.25 MILES) EAST ALONG INTERSTATE HIGHWAY 10 FROM THE OCOTILLO STREET UNDERPASS AT BENSON, AT ADAMS PEAK WASH, SET BETWEEN THE EASTBOUND LANES AND THE FRONTAGE ROAD, 14.4 METERS (47.4 FEET) NORTH OF THE CENTERLINE OF THE FRONTAGE ROAD, 13.2 METERS (43.5 FEET) SOUTH OF THE CENTERLINE OF THE EASTBOUND LANES OF INTERSTATE 10, 9.4 METERS (31.1 FEET) EAST OF THE HIGHWAY SIGN READING ADAMS PEAK WASH, 7.0 METERS (23 FEET) NORTHWEST OF THE NORTHWEST CORNER OF A CONCRETE BRIDGE ON THE FRONTAGE ROAD, 6.5 METERS (21.6 FEET) SOUTHWEST OF THE SOUTHWEST CORNER OF THE INTERSTATE HIGHWAY BRIDGE, 2.3 METERS (7.7 FEET) WEST OF A RIGHT-OF-WAY FENCE AND 2.2 METERS (7.4 FEET) EAST OF A RIGHT-OF-WAY FENCE. THE MARK IS 0.6 METERS S FROM A WITNESS POST.
02/03/1992 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1992 THE STATION IS LOCATED ABOUT 8.4 KM (5.2 MI) EAST OF BENSON, AT ADAMS PEAK WASH, SET BETWEEN THE EASTBOUND LANES OF INTERSTATE HIGHWAY 10 AND THE FRONTAGE ROAD. OWNERSHIP-ARIZONA DEPARTMENT OF TRANSPORTATION. TO REACH THE STATION FROM THE JUNCTION OF INTERSTATE HIGHWAY 10, HIGHWAY 10 BUSINESS AND POMERENE ROAD, (EXIT 306), LOCATED ABOUT 4.8 KM (3.0 MI) EAST OF BENSON, GO SOUTH ON INTERSTATE BUSINESS 10 FOR 0.32 KM (0.20 MI) TO THE JUNCTION OF A FRONTAGE ROAD. TURN LEFT AND GO EAST ON THE FRONTAGE ROAD, (OLD HIGHWAY 86) FOR 4.8 KM (3.0 MI) TO THE STATION ON THE LEFT. STATION IS NEAR THE WEST END OF CONCRETE BRIDGE OF FRONTAGE ROAD OVER ADAMS PEAK WASH. ALSO, 5.0 KM (3.1 MI) EAST ALONG INTERSTATE 10 EASTBOUND FROM EXIT 306 TO ADAMS PEAK WASH AND THE STATION ON THE RIGHT, 1.1 KM (0.7 MI) EAST OF MILE POST 309. THE STATION IS A PUNCH MARK TOP CENTER OF A STAINLESS STEEL ROD IN A GREASE FILLED PVC SLEEVE ENCASED IN AN ALUMINUM LOGO CAP FLUSH WITH THE GROUND. LOCATED 14.4 M (47.2 FT) NORTH OF THE CENTERLINE OF THE FRONTAGE ROAD, 13.2 M (43.3 FT) SOUTH OF THE CENTERLINE OF INTERSTATE HIGHWAY 10 EASTBOUND LANES, 9.4 M (30.8 FT) EAST OF A SIGN READING ADAMS PEAK WASH, 7 M (23.0 FT) NORTHWEST OF THE NORTHWEST CORNER OF FRONTAGE ROAD BRIDGE, 6.5 M (21.3 FT) SOUTHWEST OF THE SOUTHWEST CORNER OF THE EASTBOUND LANE BRIDGE, 2.3 M (7.5 FT) WEST OF A WIRE FENCE, 2.2 M (7.2 FT) EAST OF A WIRE FENCE AND 0.31 M (1.02 FT) SOUTH OF A FIBERGLASS WITNESS POST.
01/27/1994 by NOS (GOOD)
RECOVERY NOTE BY NATIONAL OCEAN SERVICE 1994 (JDR) RECOVERED AS DESCRIBED. NOTE- MARK IS NORTH OF CARSONITE WITNESS POST.
12/19/1995 by CHANCE (GOOD)
RECOVERY NOTE BY JE CHANCE AND ASSOCIATES 1995 (MFY) RECOVERED AS DESCRIBED AND IN GOOD CONDITION.
11/05/1998 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1998 (CSM) RECOVERED AS DESCRIBED.

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in September 1992.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • 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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