2009-03-10

GT1660 - 597 / GT2031 - 601

County: FRESNO
State: CALIFORNIA

THIS MARK IS IDENTIFIED IN WITH TWO NGS NUMBERS AND DATASHEETS
THIS MARK WAS ORIGINALLY VISITED ON FEBRUARY 16, 2003

PUBLISHED DATA FOR GT1660
Lat: N 36° 54.867
Long: W 119° 31.200
Altitude: 600
Coordinates may not be exact. Altitude is VERTCON and location is SCALED.

Designation: 597
Marker Type: survey disk
Setting: in a boulder
Stability: May hold, but of type commonly subject to surface motion.

Documented History (by the NGS)
Unknown by USGS (MONUMENTED)

1/1/1972 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1972 2.2 MI NE FROM ACADEMY. 2.2 MILES NORTHEAST ALONG STATE HIGHWAY 168 FROM THE JUNCTION OF MADSEN AVENUE AT ACADEMY, IN THE TOP OF A 10- BY 5-FOOT GRANITE BOULDER PROJECTING ABOUT 1/2 FOOT ABOVE THE GROUND, 24.0 FEET EAST OF THE CENTER LINE OF THE HIGHWAY, 91.30 FEET NORTH OF TRIANGULATION STATION LEE, 106 FEET NORTH-NORTHWEST OF A 24-INCH OAK TREE, 0.9 FOOT EAST OF A FENCE, AND ABOUT 1 FOOT HIGHER THAN THE HIGHWAY. SEC 1, T12S, R22E.


PUBLISHED DATA FOR GT2031
Lat: N 36° 54.905
Long: W 119° 31.223
Altitude: 184.7
Coordinates may not be exact. Altitude is VERTCON and location is ADJUSTED.

Designation: 601
Marker Type: survey disk
Setting: in a boulder
Stability:

Documented History (by the NGS)
1/1/1950 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1950 THE U.S. GEOLOGICAL SURVEY BENCH MARK IS 23 FEET EAST OF THE CENTER OF STATE HIGHWAY 168 AND 1 FOOT EAST OF A FENCE. IT IS SET IN A DRILL HOLE IN A LARGE, FLAT BOULDER THAT PROJECTS 1 FOOT ABOVE THE GROUND SURFACE. THE MARK IS 1.10 METERS LOWER THAN STATION LEE. THE MARK IS STAMPED 601 597 F.


FOUND DATA
Lat: N 36° 54.905
Long: W 119° 31.224
Alt: 586

Found USGS benchmark stamped "601 597 F" at 17:05, March 10, 2006 as described and in good condition. Go to description is adequate. The described oak tree remain and is now approximately 30"-33" in diameter at chest level.

Published NAD83 coordinates are located about 4 feet east of the found WGS84 coordinates. WGS84 coordinates for the mark found by 2.5 minute occupation with 9 strong satellites and 2 WAAS satellites.

Benchmark detail.


The benchmark and the GPSr.


View northerly at the benchmark setting.


View northerly up Morgan Canyon Road (State Route 168).


View east at the benchmark setting.


View southeasterly at the benchmark setting and the described Oak tree.


View southerly down Morgan Canyon Road (State Route 168) toward triangulation station GT1659.

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