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Details for Benchmark: AB8246

N 34° 06.200 W 117° 46.167 (NAD 83)

Altitude: 1063.56

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

Location:
In LOS ANGELES county, CA View Original Datasheet
Designation:
UF 225
Marker Type:
bench mark disk
Setting:
light structures
Stability:
Mark of questionable or unknown stability.

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Nice and clean today because of the rain. Thanks.

Recovered this benchmark successfully as described. It is in good condition.

[Photos:]
photoAB8246

Looking for benchmarks while visiting my dad. This was an easy find.

[Photos:]
photouf 225

I found this benchmark in good condition today. I used shell1fish's coordinates which were very good.

[Photos:]
photoUF 225
photoUF 225 showing catch basin
N 34° 06.205 W 117° 46.133

Found as described. There are some surface scratches on the disk, but otherwise it is in good condition. The markings are clearly legible.

[Photos:]
photoClose-up of UF 225 - AB8246 Benchmark
photoLocation of of UF 225 - AB8246 Facing West

found while searching for a nearby cache. looks like its doing well.

Recovered as described.

[Photos:]
photoAB8246 Disc in La Verne, CA
photoAB8246 Area in La Verne, CA

Right next to a cache. Found it.

Benchmark was in good condition.

[This entry was edited by Raggs on Sunday, February 27, 2005 at 11:54:01 AM.]

[Photos:]
photoAB8246 Benchmark - 1.JPG

Documented History (by the NGS)

01/01/1994 by MWDSC (MONUMENTED)
DESCRIBED BY METRO WATER DISTR SO. CALIFORNIA 1994 (JDG) LA VERNE, FROM THE INTERSECTION OF WHEELER AVENUE AND BONITA AVENUE PROCEED EASTERLY ALONG BONITA AVE TO D STREET, PROCEED NORTHERLY ALONG D STREET TO 6TH STREET, MONUMENT IS LOCATED ON THE NORTHEAST CORNER OF INTERSECTION, 62 FEET (18.9 M) EAST OF D STREET, 16 FEET (4.9 M) NORTH OF 6TH STREET, 42 FEET (12.8 M) SOUTHEAST OF POWER POLE NUMBER 517870E, 14 FEET (4.3 M) SOUTH OF 6 FT (1.8 M) HIGH CHAIN-LINK FENCE, SET 3-1/4 IN. MWDSC BRASS DISK STAMPED UF 225 1994 FLUSH IN THE SOUTHWEST OF A 5 FT (1.5 M) BY 5 FT (1.5 M) CONCRETE CATCH BASIN. REFERENCE MWD FB 2002 01 134.

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 February 1997.
  • 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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