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Details for Benchmark: FV0182

N 35° 23.467 W 120° 36.367 (NAD 83)

Altitude: 1002.78

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:
S 156
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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Wow. Looking at the old photos, those trees sure grew in the last few years. Mark is in great shape hidden under the trees there.

[Photos:]
photoS 156 Up Close
photoS 156 Setting View
The camera is facing southwest towards Encina Avenue. The mark is just to the left of my flashlight beam.

Found at N35 23.480 W120 36.396.

[Photos:]
photoFV0182 - Santa Margarita, Ca
photoFV0182 - Santa Margarita, Ca
View East from near the RR tracks

Found in good condition as described. Will file recovery report with NGS.

[Photos:]
photoFV0182 "S 156" Close-Up
photoFV0182 "S 156" View E from Encina Avenue
Witness post and concrete post are visible in the right-center of picture.

Documented History (by the NGS)

01/01/1933 by CGS (MONUMENTED)
01/01/1968 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1968 AT SANTA MARGARITA. AT SANTA MARGARITA, 0.05 MILE NORTHEAST ALONG STATE HIGHWAY 58, THENCE 0.1 MILE SOUTHEAST ALONG ENCINA AVENUE FROM THE POST OFFICE, AT THE CROSSING OF THE SOUTHERN PACIFIC COMPANY RAILROAD, 41 1/2 FEET NORTHEAST OF THE CENTER LINE OF THE AVENUE, 46.6 FEET SOUTHEAST OF THE SOUTHEAST RAIL, 140 FEET NORTHWEST OF THE CENTER LINE OF H STREET, 71 FEET NORTHWEST OF TELEPHONE POLE 9451, 23 FEET EAST OF A RAILROAD CROSSING SIGN POST, 1.6 FEET NORTHEAST OF A WITNESS POST, ABOUT LEVEL WITH THE AVENUE, AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.8 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.
01/30/1989 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1989 RECOVERED IN GOOD CONDITION WITH THE FOLLOWING EXCEPTIONS. DELETE--71 FEET NORTHWEST OF TELEPHONE POLE 9451, AND 23 FEET EAST OF A RAILROAD SIGN POST.

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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