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Details for Benchmark: FV0144

N 35° 23.300 W 120° 34.817 (NAD 83)

Altitude: 1018.64

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

Location:
In SAN LUIS OBISPO county, CA View Original Datasheet
Designation:
Z 65
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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I passed this one up earlier as I headed south, but found it right away on my way back up north before heading east here. Mark is in great shape and easy to spot.

[Photos:]
photoZ 65 Up Close
photoZ 65 Setting
Looking east from the road towards the signs.

Found atN35 23.312 W120 34.843. Wooden highway maintenance post is no longer there. No witness post.

[Photos:]
photoFV0144 - Santa Margarita, Ca.
disk
photoFV0144 - Monument
photoFV0144 - View NE
photoFV0144 - View west

Found in good condition as described. NGS recovery report submitted.

[Photos:]
photoFV0144 "Z 65" Close-Up

Documented History (by the NGS)

01/01/1927 by CGS (MONUMENTED)
01/01/1968 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1968 1.8 MI E FROM SANTA MARGARITA. 1.8 MILES EAST ALONG STATE HIGHWAY 58 FROM THE POST OFFICE AT SANTA MARGARITA, AT THE JUNCTION OF POZO ROAD, 35 1/2 FEET SOUTHEAST OF THE CENTER LINE OF THE HIGHWAY, 43 FEET NORTHEAST OF THE CENTER LINE OF THE ROAD, 130 FEET NORTHWEST OF POWER POLE 25 WITH A GUY WIRE, 3.8 FEET SOUTHEAST OF A 6- BY 6-INCH WHITE WOODEN POST DESIGNATING HIGHWAY MAINTENANCE SECTIONS, 13.8 FEET NORTHEAST OF THE NORTHEAST END OF A 24-INCH PIPE CULVERT, 73 1/2 FEET SOUTHWEST OF TELEPHONE POLE 1, 2.3 FEET NORTHEAST OF A WITNESS POST, ABOUT LEVEL WITH THE HIGHWAY, AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.3 FOOT ABOVE THE GROUND.
01/01/1971 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1971 RECOVERED IN GOOD CONDITION.
01/01/1977 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 RECOVERED IN GOOD CONDITION.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was determined by differential leveling and adjusted by the National Geodetic Survey in June 1991.
  • The geoid height was determined by GEOID99.
  • The dynamic height is computed by dividing the NAVD 88 geopotential number by the normal gravity value computed on the Geodetic Reference System of 1980 (GRS 80) ellipsoid at 45 degrees latitude (G = 980.6199 gals.).
  • The modeled gravity was interpolated from observed gravity values.

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