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Details for Benchmark: DX1561

N 33° 36.133 W 117° 27.433 (NAD 83)

Altitude: 1408.1

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

Location:
In ORANGE county, CA View Original Datasheet
Designation:
G 313
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.

Must Read!

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I saw this when searching for a geocache. I did see a car down below in the canyon.

Saw this when placing the nearby geocache!

Found today with katrat13. Mark is in good shape.

Found while logging nano nation

Found this right next to "Nano Nation: Borderline" (GC1AK9H).

[Photos:]
photoP1000758 - Copy
Found this benchmark DX1561 (says "G313, 1935") right next to "Nano Nation: Borderline" (GC1AK9H).
photoP1000759 - Copy
They added a new guard rail by this dangerous corner.

Cool a two-fer!! Nice views but a little unnerving the way some of these So-Cali drivers come around the bends.

[Photos:]
photoBenchmark Find

Right next to a geocache so hard to miss...almost stepped on it.

Sometimes it helps to look at your feet. This was clear as day and in great condition.

Found it with the rest of the caching crew...Pacholik, JJG10101, and Boilermaker_82. Although we didn't have a camera, it is within a few feet of the county line marker in excellent condition.

Hey, it's been a while since I logged a benchmark. Spotted this one oh-so-close to a cache.

Yeah, what they said. It was 20 FEET WEST OF THE ORANGE-RIVERSIDE COUNTY-LINE SIGN, 19 FEET NORTH OF THE CENTERLINE OF THE HIGHWAY, AND 3-1/2 FEET SOUTH OF A CALIFORNIA STATE DIVISION OF HIGHWAYS MAINTENANCE-SECTION SIGN.

If not for the previous finder's log on the cache nearby, I wouldn't have known to find it. Very visible... and it looks like it won't be amongst the construction nearby.

Oh yeah... by the way... My first benchmark cache!

I came up here to get an FTF on a geocahe and find a benchmark only two feet away. Double score. Marker looks to be in pretty good condition.

Recovered as described.

[Photos:]
photoDX1561 in Orange County, CA
Disc closeup
photoDX1561 in Orange County, CA
Disc view, wider area
photoDX1561 in Orange County, CA
Disc & monument area

Stopped by on the way to work to check this one off my list. Easy to spot and nice close-by parking.

N 33° 36.133 W 117° 27.447

Just off the Ortega Highway, very near the county line.

[Photos:]
photoBM & GPSr
photoSurroundings

Documented History (by the NGS)

01/01/1935 by CGS (MONUMENTED)
DESCRIBED BY COAST AND GEODETIC SURVEY 1935 4.3 MI NE FROM SAN JUAN HOT SPRINGS. 4.3 MILES NORTHEAST ALONG STATE HIGHWAY 74 FROM SAN JUAN HOT SPRINGS, ORANGE COUNTY, 20 FEET WEST OF THE ORANGE-RIVERSIDE COUNTY-LINE SIGN, 19 FEET NORTH OF THE CENTERLINE OF THE HIGHWAY, AND 3-1/2 FEET SOUTH OF A CALIFORNIA STATE DIVISION OF HIGHWAYS MAINTENANCE-SECTION SIGN. A STANDARD DISK, STAMPED G 313 1935 AND SET IN THE TOP OF A CONCRETE POST.
01/01/1958 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1958 RECOVERED IN GOOD CONDITION.

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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