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Details for Benchmark: EV2546

N 34° 22.733 W 117° 41.400 (NAD 83)

Altitude: 6866.3

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

Location:
In LOS ANGELES county, CA View Original Datasheet
Designation:
RS
Marker Type:
survey 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 in good condition while out grabbing the nearby geocahe

Found the nearby geocache last week and didn't notice the benchmark. Came back this week to finish off the 2 for 1 here.

[Photos:]
photoThe mark
photoIn situ

Easy grab on a summer day.

Found it this time with my camera. Second time here.

[Photos:]
photoBM
photoBM Area

Found this while out looking for a geocache. Enjoyed the day and the history here.

saw this while searching for the nearby cache

[Photos:]
photonear big pines arch

Papa B7 found the nearby cache, but I found the benchmark. It's nice to share :)

I logged my first bench mark with BabyT71. We stumbled upon it by accident but I is still worth logging. This is so cool.

[Photos:]
photoHere it is

Found it today while searching for the nearby cache. Cool!

BenH57, Interbang, and I stumbled upon this benchmark while looking for [url=http://coord.info/GC2AEJT]Big Pines Arch[/url].

[Photos:]
photoBenchmark EV2546 near Big Pines Arch

Found while searching for the nearby cache. Thanks for sharing!

N 34° 22.739 W 117° 41.400

34°22.739'N
117°41.4'W

[Photos:]
photoBenchmark
photoLocation View 1
Benchmark is within lightened circular area at bottom of photo, with Big Pine Lodge / Ranger Station in background.
photoLocation View 2
Benchmark is within lighten circular area at bottom of photo with stone lookout tower in background.
photoLocation View 3
Lookout Tower and Big Pine Lodge / Ranger Station. Benchmark is just behind tower on the right, with step leading up to it.
photoLocation View 4
Benchmark is not viewable, but withing lightened circular area at top of steps to the right of Lookout Tower.

Found in good condition.

[Photos:]
photoBM is lower right in front of Tower

This survey disk is in very good condition, both stable and legible.

[Photos:]
photoEV2546
Designation: RS

Recovered after a nice morning 7 mile or so hike. Located as described.

[Photos:]
photoEV2546 near Wrightwood, CA
Disc closeup
photoEV2546 Disc near Wrightwood, CA
Disc Area
photoEV2546 Disc near Wrightwood, CA
View of Disc area, looking Southeast, across the road (Route 2), Angeles Crest Highway.
photoEV2546 Disc near Wrightwood, CA
Disc area, and view of a nice stone tower next to the disc

We were up here with family checking on some caches in the area, so stopped by to find this benchmark.

[Photos:]
photoBenchmark
Wrightwood Benchmark
N 34° 22.740 W 117° 41.401

2:12 pm
Found Bench Mark
This was an easy find, as it is right next to the Ranger Station, and is nice and buffed clean.

RayClone

[Photos:]
photoBench Mark
Buffed Clean!

Documented History (by the NGS)

01/01/1924 by USGS (MONUMENTED)
01/01/1971 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1971 AT BIG PINES. AT BIG PINES, AT THE NORTHWEST EDGE OF THE FRONT LAWN OF BIG PINES RANGER STATION, 29 FEET NORTHEAST OF THE CENTER LINE OF STATE HIGHWAY 2, 15.8 FEET WEST OF THE WEST CORNER OF THE HEADQUARTERS BUILDING, 8.9 FEET SOUTHEAST OF THE EAST CORNER OF A MONUMONT, ABOUT 5 FEET HIGHER THAN THE HIGHWAY, AND SET IN THE TOP OF A CONCRETE POST FLUSH WITH THE GROUND. SEC 2, T3N, R8W.
01/01/1971 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1971 RECOVERED IN GOOD CONDITION.
01/01/1977 by NGS (GOOD)
RECOVERY NOTE BY NATIONAL GEODETIC SURVEY 1977 RECOVERED IN GOOD CONDITION.

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 1993. * This is a READJUSTED BENCH MARK height. Code A indicates a distribution rate of 0.0 thru 1.0 mm/km. The height was derived from older observations constrained to new heights in a crustal motion area. The height is approximate in relation to other heights in its vicinity.
  • 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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