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Details for Benchmark: DY0518

N 33° 53.850 W 118° 01.733 (NAD 83)

Altitude: 97.1

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

Location:
In LOS ANGELES county, CA View Original Datasheet
Designation:
K 778 RESET
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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Found as described. With NamGuy today.

Found near the NE corner of Stage Road & Valley View.

[Photos:]
photoK778_1.jpg
photoK778_2.jpg

Recovered exactly as described. Easy parking across Valley View Avenue.

[Photos:]
photoDY0518 Closeup in La Mirada, CA
photoDY0518 Looking Northwest up Stage Rd,
photoDY0518 looking South down Valley View Ave

I found a USCGS disk stamped 'K778 1945' one foot northeast of the northeast curb of Stage, ten feet southeast of the curb return leading to north-bound Valley View. The disk is kinda scratched, but it looks like the sidewalk was poured around it, so it may have been disturbed. I got N33/53.865 W118/1.731. I think it's more than a little unusual to find a re-set disk that's not marked 'RESET', but the description is just too good to be the wrong disk.
-Hopscotch

N 33° 53.865 W 118° 01.727

In good shape. elevations seems to have been ground off.

Documented History (by the NGS)

1/1/1945 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1945 3.3 MI E FROM NORWALK. 3.3 MILES EAST OF NORWALK, LOS ANGELES COUNTY, AT THE INTERSECTION OF VALLEY VIEW AVENUE, AND STATE ROAD, 31.5 FEET NORTH OF THE CENTERLINE OF THE ROAD, 87.5 FEET EAST OF THE CENTERLINE OF VALLEY VIEW AVENUE, 1.5 FEET BACK OF THE CURB, AND IN CONCRETE. A STANDARD DISK, STAMPED K 778 1945. NOTE-- THIS BENCH MARK WAS ESTABLISHED BY THE LOS ANGELES COUNTY SURVEYOR IN JANUARY 1956.
1/1/1970 by CA-037 (GOOD)
RECOVERY NOTE BY LOS ANGELES COUNTY CALIFORNIA 1970 RECOVERED IN GOOD CONDITION.
1/1/1987 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1987 RECOVERED IN GOOD CONDITION. NEW DESCRIPTION FOLLOWS. 2.1 KM (1.30 MI) SOUTH ALONG VALLEY VIEW AVENUE FROM THE INTERSECTION OF IMPERIAL HIGHWAY IN LA MIRADA, IN A CONCRETE POST IN THE NORTH SIDEWALK OF STAGE ROAD, 26.5 M (86.9 FT) EAST OF THE AVENUE CENTERLINE, 9.6 M (31.5 FT) NORTH OF THE ROAD CENTERLINE, 5.5 M (18.0 FT) WEST OF THE WEST END OF A BLOCK WALL, 1.8 M (5.9 FT) EAST OF THE NAIL DESIGNATED CY 2776 LA CO. NOTE--A COUNTY DESCRIPTION FOR THE ALIAS SAYS THE MARK WAS RESET BY LA CO ENGINEERS IN 1956. THE MARK IS ABOVE LEVEL WITH THE ROAD.

Control Text

  • The horizontal coordinates were scaled from a topographic map and have an estimated accuracy of +/- 6 seconds.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.
  • The geoid height was determined by GEOID99.

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