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Details for Benchmark: DY2823

N 33° 44.653 W 118° 24.489 (NAD 83)

Altitude: 309

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

In LOS ANGELES county, CA View Original Datasheet
Marker Type:
NGS Benchmark
setting not listed - see description

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N 33° 44.653 W 118° 24.489

Followed the well worn trail to a scenic viewpoint and this benchmark. Disk was easily located and is in good condition at this time.

photoSAN PEDRO HILLS D 7 LA CO 1960 DY2823 LA County CA
photoSAN PEDRO HILLS D 7 LA CO 1960 DY2823 Location
View looking NW along Palos Verdes Drive West. Disk is not visible in this picture, but is directly adjacent to the concrete pad in the foreground.

We found it while caching nearby.

Still there!

photoIt says 1936, not 1960?

WOW, as others - found after finding nearby Vachman's. My first real station! I agree, this is a fantastic view!

Found as described.
Recovery report submitted to the NGS.

Note: station has 3 unique concrete pads emplaced around it, presumably to support surveying equipment taking station here. Benchmark DY2824 'NEBRASKA' (or what remains of it) is located several feet SW of this mark; all that's left is a heavily-chipped concrete marker (without brass plate).

This is arguably one of the finest views I've ever seen from a benchmark location in a built-up area. The mark is located on a former Nike antiaircraft missile site, now know as Point Vicente Park. There is a modest amount of parking several hundred yards east on the ridge at the Palos Verde City Offices (located in the missile base's former fire control center building - a great recycling of Cold War equipment into something useful today).

photoDY2823 SAN PEDRO HILLS D 7 LA CO 1960 (closeup) CA
photoDY2823 SAN PEDRO HILLS D 7 LA CO 1960 (view SW) CA
Looking across mark SW to Point Vicente Lighthouse (CY2826) and the Pacific Ocean. Note the 3 unique concrete pads for stabilizing surveying equipment occupying this station (one is in the low brush at left). DY2824 NEBRASKA is hiding in the deep grass just beyond the far center concrete pad in this photo, in front of the prickly pear cactus.
photoDY2823 SAN PEDRO HILLS D 7 LA CO 1960 (view NE) CA
Looking across the mark up the ridge towards the city offices, the windmill, and past the antenna pole.

Out for a walk and some benchmarking. Found this one right where it was supposed to be.

Close-up of the mark.
photoDY2823 Location
The area around the mark.

My friend, Foon, and I stumbled upon this one after finding 'Vacman's cache #1 - "Under the Rhombic"' (GCC373), but hadn't finished signing the log; we were lurking in the bushes and there it was! It is marked as a triangulation station, R.E. 2177, in 1936. Man! 70 years ago! Older than me...

TroupB-B and I stumbled upon this one after finding 'Vacman's cache #1 - "Under the Rhombic"' (GCC373). It is marked as a triangulation station, R.E. 2177, in 1936.

Found with DBC FOR LIFE in route to a geocache.

Fd in good condition 11-13-04. Thanks to Alfred Jones and his crew for setting it in '36

[This entry was edited by DBC FOR LIFE on Sunday, November 14, 2004 at 9:30:12 AM.]

Found next to a nearby cache and concrete bunker.
Johnny and Betty


We found this and agree with others -- it was marked 1936 and not 1960 with the markings RE 2177.But it matches the pictures.

Stumbled into this one while geocaching. My first logged benchmark. The title says 1960 but the mark says 1936. Interesting location with the bunker there which seems to now be under Coast Guard authority. Anyone know the story for that?

Found it in fine shape and no difficulty in finding it.

Stumbled on this some time ago but didn't know how to log it. Thought I'd try again. It's my 2nd benchmark! Coords are very close to mine.

photoBenchmark DY2823 wide shot; facing southeast

Found next to a nearby cache. My first benchmark.

photoSan Pedro Triangulation Station

This is in a nice historic location near a WWII coastal defense bunker. There's a letterbox nearby that uses this marker as a clue.

A very nice old disk, with lots of blue from the moist salt air. LA County Survey Control Systems disk, also stamped 1936, RE 2177. The coordinates are listed as adjusted and they were very close to what my GPSr showed.

Found this benchmark after my Tina, my girlfriend, and I found Vacmans #3 (under the rhombic) cache. Her first for both.

Found when placing Rhombic Cache

Documented History (by the NGS)

01/01/1960 by CGS (MONUMENTED)

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in June 1996. The horizontal coordinates are valid at the epoch date displayed above. The epoch date for horizontal control is a decimal equivalence of Year/Month/Day.
  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.)
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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