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Details for Benchmark: EV0896

N 34° 06.400 W 117° 13.150 (NAD 83)

Altitude: 1159.5

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

Location:
In SAN BERNARDINO county, CA View Original Datasheet
Designation:
HARLEM RM 2
Marker Type:
reference 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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N 34° 06.408 W 117° 13.180

Found the benchmark as described and in good condition. Found this one while on a BM Adventure with Ruznuz, today. #58

Found while out on an epic benchmark hunt with CraigsOutside. My picture is kind of crap, so I may come back another day to get a better shot when it's light out.

[Photos:]
photoHARLEM RM 2

Found with Supercheeseburger

Followed fellow Geo-cacher kewnsue's footsteps and NGS instructions and found this Benchmarker in good condition with my Geo-partner Dyer55. Both of us will be using my pictures for reference.

[Photos:]
photoEV0896
photoEV0896-1

I parked in front of this car lot and started searching. I was in the vacant field next to the lot. The owners of the car lot came by to drop off a few used cars. Knowing my lone motorcycle might give them concern I walked over to them and started up a convo. They told me there is anothe BM on the lot and they showed me where it was. Under a car. I took a pic the best I could but it is this benchmark

[Photos:]
photoEV0896

Documented History (by the NGS)

1/1/1928 by CGS (MONUMENTED)
1/1/1956 by NGS (GOOD)
DESCRIBED BY NATIONAL GEODETIC SURVEY 1956 0.1 MI E FROM NORTON AFB. 0.1 MILE EAST ALONG 3RD STREET FROM GATE 5 AT NORTON AIR FORCE BASE, IN A VACANT LOT, 70.8 FEET WEST OF HARLEM TRIANGULATION STATION, 79.3 FEET NORTH OF THE CENTER LINE OF THE STREET, 18.5 FEET NORTHEAST OF A FENCE CORNER POST, ABOUT LEVEL WITH THE STREET, AND SET IN THE TOP OF A CONCRETE POST PROJECTING 0.4 FOOT ABOVE THE GROUND.

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  • The NAVD 88 height was computed by applying the VERTCON shift value to the NGVD 29 height (displayed under SUPERSEDED SURVEY CONTROL.) The vertical order pertains to the superseded datum.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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