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Details for Benchmark: AE2530

N 41° 40.690 W 088° 02.211 (NAD 83)

Altitude: 672

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

Location:
In WILL county, IL View Original Datasheet
Designation:
WILL COUNTY GPS 224
Marker Type:
NGS Benchmark
Setting:
setting not listed - see description
Stability:
Most reliable and expected to hold position/elevation well.

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Still there and filled with water.

[Photos:]
photoSetting
photoAE2530-1
photoAE2530-2

Found after the Keepataw CITO event.

Ledad16 pointed this out to my at the CITO event, so I thought I'd take a look and add it as my second ever BenchMark. Very interesting.

Good thing lemon16 has a great memory. He told us that this benchmark was here as we parked nearby to attend the "Will County CITO at Keepataw Preserve" event.

spotted while out for the CITO event today.

found it

Found at the coordinates as described. See pics.

[Photos:]
photoAE2530 setting
photoAE2530

I found this one driving by.
I came back later looking for a cache so I got a closer look at the benchmark.

[Photos:]
photoCraig

my first BM! c+c Insisted th@ we find it!

I cannot believe that no one else has logged this benchmark as of yet. I found this benchmark while attempting to find Cacheopoly#4 - Go Vertical. The only reason that I thought to look is there is a metal rod indicating benchmark location.
The metal cap has lost a screw and water has seeped in - freezing around the post. Well, hope that it defrosts before it is needed.

Documented History (by the NGS)

01/01/1997 by ASCPC (MONUMENTED)
DESCRIBED BY AMERICAN SURVEYING CONSULTANTS PC 1997 (PS) FROM INTERSECTION OF IL RTE 53 AND JOLIET RD GO NORTH ON JOLIET RD 1 MI (1.6 KM) TO BLUFF ROAD GO RIGHT (EAST) 0.95 MI. STATION IS IN FRON OF KEEPATAW FOREST PRESERVE SIGN. STATION IS FLUSH WITH SURFACE AND IS STAINLESS ROD WITH SLEEVE WITH CAST CAP AND LID

Control Text

  • The horizontal coordinates were established by GPS observations and adjusted by the National Geodetic Survey in October 1999.
  • The orthometric height was determined by GPS observations and a high-resolution geoid model.
  • The X, Y, and Z were computed from the position and the ellipsoidal ht.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The ellipsoidal height was determined by GPS observations and is referenced to NAD 83.
  • The geoid height was determined by GEOID99.

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