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Details for Benchmark: AH4828

N 38° 49.450 W 121° 11.433 (NAD 83)

Altitude: 407.4

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

Location:
In PLACER county, CA View Original Datasheet
Designation:
H 566 RESET
Marker Type:
vertical control disk
Setting:
pavements (street, sidewalk, curb, apron, etc.)
Stability:
Mark of questionable or unknown stability.

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N 38° 49.470 W 121° 11.429

Found thanks to GB's coords but I tweaked them a little. Right outside a door on the horizontal surface. This is at an elementary school so it's recommended to find this on weekends. I was there on a Sunday and no one around.

[Photos:]
photoBM AH4828

Went out tonight with my NCEES Trackable and found this benchmark. Since it was after school there wasn't any one around. I spotted the benchmark quickly.

[Photos:]
photoRG at Benchmark AH4828
photoBenchmark AH4828

Out grabbing some benchmarks. Found at N38° 49.473 W121° 11.433

*´¨) Thanks for the cache
¸.•´¸.•*´¨) ¸.•*¨)
(¸.•´¸.•*(¸.•' garybech AKA Circled "GB"

[Photos:]
photoH566

Still there, right where it was noted on the last log. Nothing to add.

[Photos:]
photoRight There where it should be
In great condition.
N 38° 49.473 W 121° 11.433

My eTrex Legend put me at a spot roughly 50' south of the benchmark when using the NAD83 coordinates on this page. Claiming 30-foot accuracy, it displayed the WGS84 coordinates just above and an elevation of 396 feet. The benchmark is in good condition.

[last edit: 6/25/2002 9:25:34 PM PST]

[Photos:]
photoSite
The benchmark can be seen at the base of the column just left of the door. The center plaque on the monument at far left notes the school was dedicated in 1924 and rededicated in 1975, which is about when this and nearby buildings appear to have been built. This would explain this mark's "RESET" designation.
photoH566 RESET - 1975

Documented History (by the NGS)

01/01/1975 by NGS (MONUMENTED)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1975 (LAC) 7.55 MILES (12.15 KM) NORTHEAST ALONG THE SP CO RR FROM THE STATION AT ROSEVILLE, AT LOOMIS UNION GRAMMAR SCHOOL, ABOUT 295 FEET (89.9 M) SOUTHEAST OF THE JUNCTION OF TAYLOR AND KING ROADS, ABOUT 400 FEET (121.9 M) SOUTHEAST OF THE CROSSING OF KINGS ROAD, SET IN THE TOP OF THE CONCRETE APRON AT THE WEST ENTRANCE TO THE ADMINISTRATION BUILDING OF THE SCHOOL, 4.5 FEET (1.4 M) NORTH OF THE CENTER OF THE DOORWAY, 1.1 FOOT (0.3 M) WEST OF THE WEST SIDE OF THE BUILDING.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The orthometric height was computed from unverified reset data.
  • The geoid height was determined by GEOID99.

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