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Details for Benchmark: GU1086

N 36° 59.400 W 120° 06.550 (NAD 83)

Altitude: 255.2

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

Location:
In MADERA county, CA View Original Datasheet
Designation:
P 802
Marker Type:
bench mark disk
Setting:
massive structures
Stability:
Probably hold position/elevation well.

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Found while benchmarking in the Madera area.

P802 RECOVERED PER THE DESCRIPTION ON THE DATASHEET.

[Photos:]
photoG47-1
P802 AS SEEN FROM THE FENCE.
N 36° 59.421 W 120° 06.573

Found it at 18:30, 17 September 2003 as described and in good condition.

Original NAD83 coordinates were located about 0.03 miles southeasterly of the found WGS84 coordinates. WGS84 coordinates for the mark found by 3 minute occupation with 7 strong satellites and 2 WAAS satellites.

Keep on Caching!
- Kewaneh

[Photos:]
photoGU1086-1 - Madera County, California
The benchmark on the wall.
photoGU1086-2 - Madera County, California
The benchmark and the Magellan.

Documented History (by the NGS)

01/01/1947 by CGS (MONUMENTED)
01/01/1958 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1958 3.8 MI NW FROM MADERA. 3.2 MILES NORTHWEST ALONG THE SOUTHERN PACIFIC COMPANY RAILROAD FROM THE STATION AT MADERA, THENCE 0.6 MILE SOUTHWEST ALONG AN ASPHALT ROAD, IN R17E T11S S10, AT MADERA MUNICIPAL AIRPORT, AT AN ABANDONED CONTROL TOWER BUILDING (OCCUPIED BY GROUND OBSERVER CORPS), SET VERTICALLY IN THE NORTHWEST CONCRETE WALL, 0.8 FOOT SOUTHWEST OF THE NORTH CORNER OF THE BUILDING, AND ABOUT 2 1/2 FEET ABOVE THE GROUND.

Control Text

  • This mark is at Madera Municipal Airport (MAE)
  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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 geoid height was determined by GEOID99.

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