Skip to Content

Details for Benchmark: FV1991

N 35° 10.383 W 120° 45.350 (NAD 83)

Altitude: 15.11

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:
941 2110 A TIDAL
Marker Type:
tidal station disk
Setting:
stainless steel rod
Stability:
Most reliable and expected to hold position/elevation well.

Must Read!

Benchmarks may be on private property or in dangerous locations. Obey local laws. By using the services on Geocaching.com you agree to this disclaimer.

Found in good condition after a little effort.

stumbled across this one

Found at N35 10.363 W120 45.371

[Photos:]
photoFV1991 - Port San Luis, Ca
photoFV1991 - Setting

Found as described. Filed recovery report with NGS.

[Photos:]
photoFV1991 "941 2110 TIDAL A" Close-Up
photoFV1991 "941 2110 TIDAL A" View NE toward Avila
Marker is inside the white pvc pipe next to a rock at right of photo.
photoFV1991 "941 2110 TIDAL A" View E
Marker is in white pvc pipe at left of photo. Referneced hydrant is visible at right of photo.

Documented History (by the NGS)

01/01/1982 by NOS (MONUMENTED)
02/10/1989 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1989 2.1 KM (1.30 MI) WESTERLY ALONG AVILA ROAD FROM THE JUNCTION OF FRONT STREET IN AVILA BEACH, AT PORT SAN LUIS, 8.2 M (26.9 FT) SOUTHWEST OF THE CENTER OF A ROAD LEADING TO A SERVICE STATION AND BAIT SHOP, 6.0 M (19.7 FT) EAST OF THE CENTER OF THE MAIN ROAD LEADING TO THE HARBOR HEADQUARTERS, 3.1 M (10.2 FT) NORTH OF A FIRE HYDRANT, 3.0 M (9.8 FT) NORTHWEST OF A MANHOLE COVER, AND IS A DISK CRIMPED TO A STAINLASS STEEL ROD THAT IS ENCASED IN A 4-INCH PVC PIPE.

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.
  • This Tidal Bench Mark is designated as VM 951 by the Center for Operational Oceanographic Products and Services.
  • 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.

Advertising with Us

Return to the Top of the Page