HR0596 "NN701 1943"

Spent the day in Madera County exploring some of the back-roads in and around the community of Raymond, California.  Found a few benchmarks while I was at it.

Located in rural Madera County, California, this USGS mark lies on the east side of Road 613 on the top of the northeast wing-wall for a small culvert bridge.  The USGS mark stamped "NN701 1943" was found at 09:20, 16 November 2019 as described and in generally good condition. Go to description is adequate to find the mark.

The southeast wing-wall has a 1940 Works Projects Administration (WPA) stamp on it, meaning this was a product of Franklin D. Roosevelt's New Deal agency.

Published NAD83 coordinates are located about 218 feet southeasterly of the found WGS84 coordinates. WGS84 coordinates for the mark found by 4 minute occupation with 8 strong satellites and 1 WAAS satellite.

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Found Details for Benchmark: HR0596
N 37° 14.959 W 119° 55.498 (WGS 84)
Altitude: 949
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Published Details for Benchmark: HR0596
N 37° 14.933 W 119° 55.467 (NAD 83)
Altitude: 939.6

Coordinates may not be exact. Altitude is VERTCON and location is SCALED.

Location: In Madera County, CA
Designation: NN 701
Marker Type: bench mark disk
Setting: massive structures
Stability: Probably hold position/elevation well.
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Documented History (by the NGS)
01 Jan 43 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1943 2.8 MI N FROM RAYMOND. 2.8 MILES NORTH ALONG THE ROAD TO MARIPOSA FROM THE POST OFFICE AT RAYMOND, IN THE NORTHEAST CORNER OF THE EAST HEADWALL OF A CONCRETE BRIDGE, 15 FEET EAST OF THE CENTER OF ROAD AND ON A LEVEL WITH THE ROAD.

HR0596 "NN701 1943" - Benchmark detail.
HR0596 "NN701 1943" - Benchmark and GPSr.
HR0596 "NN701 1943" - Benchmark setting in the northerly end of the east wingwall of a small bridge on Road 613.  View southeasterly.
HR0596 "NN701 1943" - Benchmark setting in the northerly end of the east wingwall of a small bridge on Road 613.  View southerly along Road 613.
HR0596 "NN701 1943" - Benchmark setting in the northerly end of the east wingwall of a small bridge on Road 613.  View northerly along Road 613.
HR0596 "NN701 1943" - Benchmark setting in the northerly end of the east wingwall of a small bridge on Road 613.  View northerly along Road 613.
HR0596 "NN701 1943" - "Works Projects Administration - 1940" identification stamped into the headwall.
HR0596 "NN701 1943" - Benchmark coordinates.


Control Text
  • 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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