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Details for Benchmark: FV0142

N 35° 22.733 W 120° 34.117 (NAD 83)

Altitude: 1084.66

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:
J 903
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 stopped on the wrong side of the culvert and then had to walk down to where the benchmark was. The description is accurate, I just forgot how to follow directions. Mark was in good shape and didn't require too much shoveling.

[Photos:]
photoJ 903 Up Close
photoJ 903 Setting View
Looking southeast along the road and fenceline and towards the big tree. The mark is in front of the orange witness post.

Appreciate the two fer one.

Found at N35 22.741 W120 34.143. Monument is 23 feet northwest of a 13 foot diameter oak tree.

[Photos:]
photoFV0142 - Santa Margarita, Ca
photoFV0142 - Santa Margarita, Ca
Eye Level

Found in good condition. NGS recovery report submitted.

[Photos:]
photoFV0142 "J 903" Close-Up

Documented History (by the NGS)

01/01/1957 by CGS (MONUMENTED)
01/01/1968 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1968 2.8 MI SE FROM SANTA MARGARITA. 1.8 MILES EAST ALONG STATE HIGHWAY 58 FROM THE POST OFFICE AT SANTA MARGARITA, THENCE 0.95 MILE SOUTHEAST ALONG POZO ROAD, 222 FEET NORTHWEST OF THE CENTER OF THE JUNCTION OF A PRIVATE ROAD SOUTHWEST, 34 FEET SOUTHWEST OF THE CENTER LINE OF POZO ROAD, 153 FEET SOUTHEAST OF THE CENTER OF THE SOUTHWEST END OF A 36-INCH PIPE CULVERT, 21 FEET NORTHWEST OF A 36-INCH OAK TREE, 56.6 FEET NORTHWEST OF A TELEPHONE POLE, 1.9 FEET NORTHEAST OF A FENCE, 2.0 FEET SOUTHEAST OF A WITNESS POST, ABOUT 4 FEET LOWER THAN THE ROAD, 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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