HR0525 "Y696 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 USC&GS mark lies in the wing-wall foundation of an old bridge over the Chowchilla River. The bridge has been replaced with newer, higher bridge with a different alignment. The older bridge wing-walls and other foundation remnants can be seen below the northerly side of the new bridge. The USC&GS mark stamped "Y696 1943" was found at 09:45, 16 November 2019 as described and in generally good condition. Go to description is generally adequate to find the mark with the knowledge that the bridge has been replaced.
Published NAD83 coordinates are located about 35 feet southeasterly of the found WGS84 coordinates. WGS84 coordinates for the mark found by 3 minute occupation with 7 strong satellites and 1 WAAS satellite.
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Found Details for Benchmark: HR0525
N 37° 15.602 W 119° 56.774 (WGS 84)
Altitude: 577
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Published Details for Benchmark: HR0525
N 37° 15.600 W 119° 56.767 (NAD 83)
Altitude: 597.2
Coordinates may not be exact. Altitude is VERTCON and location is SCALED.
Location: In Madera County, CA
Designation: Y 696
Marker Type: bench mark disk
Setting: set into the top of a round concrete monument
Stability: May hold, but of type commonly subject to surface motion.
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Documented History (by the NGS)
01 Jan 43 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1943 5 MI N FROM RAYMOND. 5 MILES NORTH ALONG THE ROAD TO MARIPOSA FROM THE POST OFFICE AT RAYMOND, AT A LARGE BRIDGE OVER THE CHOWCHILLA RIVER IN THE NORTHWEST WINGWALL OF CONCRETE FOUNDATION, 22 FEET NORTH OF THE CENTER OF ROAD AND LEVEL WITH THE ROAD.
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HR0525 "Y696 1943" - Benchmark detail.
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| HR0525 "Y696 1943" - Benchmark setting in the northerly end of the west wingwall of the original bridge over the Chowchilla River. View northeasterly. |
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| HR0525 "Y696 1943" - Benchmark setting in the northerly end of the west wingwall of the original bridge over the Chowchilla River. View easterly toward the new bridge. |
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| HR0525 "Y696 1943" - Benchmark setting in the northerly end of the west wingwall of the original bridge over the Chowchilla River. View northerly. |
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| HR0525 "Y696 1943" - Benchmark setting in the northerly end of the west wingwall of the original bridge over the Chowchilla River. View westerly from the new bridge. |
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| HR0525 "Y696 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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