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Details for Benchmark: GU0212

N 36° 46.650 W 120° 43.417 (NAD 83)

Altitude: 515.01

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

Location:
In FRESNO county, CA View Original Datasheet
Designation:
G 1074
Marker Type:
bench mark disk
Setting:
abutments and piers of large bridges
Stability:
Probably hold position/elevation well.

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Super easy one, drove right up to it. Found AC6118 a few feet away too, someone logged that one without getting this one. It's on top of the concrete barrier that holds the bridge railing, so you might miss it if you're focused downwards. I did not make a waypoint, and should have as NGS has this one SCALED. Yes, I'm new at this!

[Photos:]
photoGU0212 - Fresno County, CA
Set on the top of the concrete abutment, on the east end of the north side of the bridge over Interstate 5.
photoArea surrounding GU0212 and AC6118
GU0212 is on top of the concrete at the end of the guardrail. AC6118 is on the sidewalk below, just out of left side of the picture.

Documented History (by the NGS)

1/1/1967 by CGS (MONUMENTED)
1/1/1975 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1975 17.2 MI S FROM SOUTH DOS PALOS. 13.4 MILES SOUTH ALONG RUSSELL AVENUE FROM THE SOUTHERN PACIFIC COMPANY RAILROAD STATION AT SOUTH DOS PALOS, THENCE 3.75 MILES WEST ALONG SHIELDS AVENUE, 16 FEET NORTH OF THE CENTER LINE OF THE AVENUE, IN THE TOP OF THE EAST END OF THE NORTH CONCRETE GUARDRAIL OF SHIELDS AVENUE OVERPASS 42.253 OVER INTERSTATE HIGHWAY 5, 1.2 FEET WEST OF THE EAST END OF THE GUARDRAIL, AND ABOUT 3 1/2 FEET HIGHER THAN THE AVENUE. SEC 24, T13S, R 11E.
11/25/1988 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1988 RECOVERED IN GOOD CONDITION.

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 June 1991.
  • 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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