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Details for Benchmark: HR0727

N 37° 42.983 W 119° 42.350 (NAD 83)

Altitude: 4876

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

Location:
In MARIPOSA county, CA View Original Datasheet
Designation:
176+20.06
Marker Type:
survey disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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As Wintertime noted, the survey marker is missing, but the hole is still there. My wife and I used our tape measure to confirm that this hole is indeed 200 feet east of the west end of the stone retaining wall.

The NGS has decided to officially record this survey marker as destroyed.

[This entry was edited by ltleelim on Thursday, June 19, 2008 at 4:15:49 PM.]

N 37° 42.989 W 119° 42.391

Right where the tape measure said it would be - must be gone!

[Photos:]
photo176+20.06 marker, Wawona Rd, Yosemite, CA
photo176+20.06 location, Wawona Rd, Yosemite, CA
N 37° 42.982 W 119° 42.350

A 1986 USGS survey reported: "The indentation on the top of the stone retaining wall where the disk had been remains, but the BM has been removed."

Indeed, the indentation is easily visible on the wall of the overlook. It's too bad the benchmark is gone, but how can you complain too much when you've still got a view like this to look at?

[Photos:]
photoFormer location of HR0727
Empty hole for benchmark is right under my GPS receiver, marked by yellow arrow.

Documented History (by the NGS)

01/01/1932 by (MONUMENTED)
01/01/1943 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1943 7.4 MI SW FROM OLD VILLAGE. 7.4 MILES SOUTHWEST ALONG THE YOSEMITE VALLEY ROAD FROM THE GENERAL STORE AT OLD VILLAGE, MARIPOSA COUNTY, IN YOSEMITE NATIONAL PARK, 200 FEET EAST OF THE WEST END OF A STONE RETAINING WALL, IN THE TOP OF THE RETAINING WALL, AND 25 FEET NORTH OF THE CENTERLINE OF THE ROAD. A UNITED STATES BUREAU OF PUBLIC ROADS STANDARD DISK, STAMPED 176+20.06 1317+42.21 1932.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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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