2009-03-08

HR0475 - Z 246

County: MADERA
State: CALIFORNIA

PUBLISHED DATA
Lat: N 37° 09.067
Long: W 119° 30.317
Altitude: 1005.6
Coordinates may not be exact. Altitude is VERTCON and location is SCALED.

Designation: Z 246
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.

Documented History (by the NGS)
1/1/1935 by CGS (MONUMENTED)

1/1/1943 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1943 6.7 MI S FROM NORTH FORK. IN FRESNO COUNTY, 6.7 MILES SOUTH ALONG THE AUBERRY ROAD FROM THE SIERRA INN AT NORTH FORK, MADERA COUNTY, 42 FEET SOUTHEAST OF THE CENTERLINE OF THE ROAD, AND 5 FEET NORTHWEST OF A SAN JOAQUIN POWER COMPANY DYNAMO MONUMENT. A STANDARD DISK, STAMPED Z 246 1935 AND SE IN THE TOP OF A CONCRETE POST.


FOUND DATA
Lat: N 37° 09.082
Long: W 119° 30.314
Alt: NA

The description calls for a standard disk, stamped "Z 246 1935", set in a concrete post, 5 feet northwest of a San Joaquin Power Dynamo Monument. (The standard disk was assumed to be a USC&GS disk similar to others in the area.) Found USGS mark stamped "1009 F" at 18:20, March 8, 2009 in good condition, set in the westerly corner of the Dynamo Monument. The monument is in a fenced area covered in tall grass. A disk set in a concrete post could not be seen. Go to description is adequate. There is some damage to the southerly edge of the found USGS mark, but it is still useable for survey purposes.

Published NAD83 coordinates are located about 94 feet south of the found WGS84 coordinates. WGS84 coordinates for the mark found by 2 minute occupation approximately 8 feet northwest of the monument, with 7 strong satellites and 1 WAAS satellite.

Benchmark detail. It's a USGS mark, not the USC&GS mark I was looking for.


Coordinates outside the fence.


The Dynamo and monument. The USGS mark can be seen on the westerly corner of the granite.


The Dynamo and monument. The USGS mark can be seen on the westerly corner of the granite.


Plaques on the Dynamo monument.


One of the original Dynamos.


One of the original pumps.


The Dynamo and monument.


The Dynamo and monument. Note the date in the concrete at the bottom of the picture: October 11, 1938.


The A.G.Wishon Powerhouse, Kerckhoff Lake, California

HR0478 - J 703

County: FRESNO
State: CALIFORNIA

MARK NOT FOUND

PUBLISHED DATA
Lat: N 37° 07.717
Long: W 119° 30.933
Altitude: 1719.9
Coordinates may not be exact. Altitude is VERTCON and location is SCALED.

Designation: J 703
Marker Type: bench mark disk
Setting: in rock outcrop
Stability: Most reliable and expected to hold position/elevation well.

Documented History (by the NGS)
1/1/1943 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1943 5.3 MI N FROM AUBERRY. 5.3 MILES NORTH ALONG THE NORTH FORK ROAD FROM THE POST OFFICE AT AUBERRY, FRESNO COUNTY, ON THE WEST SIDE OF A SPRING, 21 FEET NORTH OF A 12-INCH IRON CULVERT, NEAR A SMALL WATERFALL, IN A ROCK OUTCROP, AND LEVEL WITH THE ROAD. A STANDARD DISK, STAMPED J 703 1943.

1/1/1964 by USGS (MARK NOT FOUND)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1964 MARK NOT FOUND.


FOUND DATA
Lat: NA
Long: NA
Alt: NA

MARK NOT FOUND

Searched for it at 18:00, March 8, 2009. The benchmark was not located and believed to be destroyed. A small waterfall near the published coordinates was located, but there is evidence to indicate that the road may have been re-graded and widened slightly.

No new coordinates were taken.

HR0480 - H 703

County: FRESNO
State: CALIFORNIA

PUBLISHED DATA
Lat: N 37° 07.050
Long: W 119° 30.333
Altitude: 2196.6
Coordinates may not be exact. Altitude is VERTCON and location is SCALED.

Designation: H 703
Marker Type: bench mark disk
Setting: in a boulder
Stability: May hold, but of type commonly subject to surface motion.

Documented History (by the NGS)
1/1/1943 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1943 3.8 MI N FROM AUBERRY. 3.8 MILES NORTH ALONG THE NORTH FORK ROAD FROM THE POST OFFICE AT AUBERRY, FRESNO COUNTY, NEAR THE MIDDLE OF A HORSESHOE CURVE, 150 FEET WEST OF AN OLD ROAD, 40 FEET SOUTH OF A GROUP OF BOULDERS, 18 FEET WEST OF A FENCE LINE, AND IN THE TOP OF A LONE BOULDER. A STANDARD DISK, STAMPED H 703 1943.


FOUND DATA
Lat: N 37° 07.026
Long: W 119° 30.314
Alt: 2199

Found USC&GS mark stamped "H 703 1943" at 17:35, March 8, 2009 as described and in good condition. Go to description is adequate. Approximately 18 feet west of the centerline of Powerhouse Road, and 10 feet north of the centerline of a dirt road heading west.

Published NAD83 coordinates are located about 173 feet northwest of the found WGS84 coordinates. WGS84 coordinates for the mark found by 3 minute occupation with 6 strong satellites and 1 WAAS satellite.

Benchmark detail.


Benchmark and the GPSr.


View southeasterly. The mark is set in the top of the rock adjacent to the dirt road.


View southerly down Powerhouse Road. The mark is set in the top of the rock.


View westerly across Powerhouse Road. The mark is set in the top of the rock.


View northerly up Powerhouse Road. The mark is set in the top of the rock.


View easterly. The mark is set in the top of the rock adjacent to the dirt road.

HR0481 - C 247

County: FRESNO
State: CALIFORNIA

REVISITED

PUBLISHED DATA
Lat: N 37° 06.250
Long: W 119° 30.183
Altitude: 2240.5
Coordinates may not be exact. Altitude is VERTCON and location is SCALED.

Designation: C 247
Marker Type: bench mark disk
Setting: in a boulder
Stability: May hold, but of type commonly subject to surface motion.

Documented History (by the NGS)
1/1/1935 by CGS (MONUMENTED)

1/1/1943 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1943 2.7 MI N FROM AUBERRY. 2.7 MILES NORTH ALONG THE NORTH FORK ROAD FROM THE POST OFFICE AT AUBERRY, FRESNO COUNTY, 25 FEET WEST OF THE CENTERLINE OF THE ROAD, AND IN THE TOP OF A LARGE BOULDER. A STANDARD DISK, STAMPED C 247 1935.

1/1/1978 by USGS (GOOD)
RECOVERY NOTE BY US GEOLOGICAL SURVEY 1978 AUBERRY POST OFFICE, 0.45 MI. NORTH OF, ALONG AUBERRY RD., THENCE 2.55 MI. NW ALONG POWERHOUSE RD. 34 FT. SOUTH OF NORTH END OF WOODEN FENCE, 27 FT. WEST OF CENTERLINE OF RD., 10 FT. EAST OF FENCE, ABOUT 4 FT. HIGHER THAN CENTERLINE OF RD. IN A LARGE BOULDER. A STANDARD TABLET STAMPED C 247 1935.


FOUND DATA
Lat: N 37° 06.255
Long: W 119° 30.227
Alt: 2233

REVISITED

Found USC&GS mark stamped "C 247 1935" at 17:25, March 8, 2009 as described and in good condition. Go to description is adequate.

Published NAD83 coordinates are located about 214 feet east of the found WGS84 coordinates. WGS84 coordinates for the mark found by 3 minute occupation with 7 strong satellites and 2 WAAS satellites.

Benchmark detail.


Benchmark and the GPSr.


View northerly up Powerhouse Road. The mark is set in the middle of the large rock at the lower center of the image.


View easterly across Powerhouse Road. The mark is set in the middle of the large rock at the lower right of the image.


View southerly down Powerhouse Road. The mark is set in the middle of the large rock at the lower center of the image.