What is it?

[Team Fawlty]

Found this one a while ago. Any idea what it is?

Cook Cty Monument

 

Brendan

[Bill93]

I can't specifically identify it, but I'd say it is definitely a horizontal control point set by someone. It could be the agencies involved at Argonne Laboratory, the county, the state highway department since is close to a road, or even the railroad.

 

I'd think from the picture it was concrete, not stone as it says in the Waymarking description.

[Team Fawlty]

I changed the descr to concrete. I don't know why I thought it was stone. Argonne used to be located in these woods about a half mile SSW.

 

Brendan

[+Kewaneh & Shark]

It is most likely a right-of-way marker for the adjacent road/highway. The State of California DOT used similar concrete posts as right-of-way markers in the first part of the 1900's. They began to transition to underground monuments (pipes & 'T' bars) in the 40's & 50's.

 

Similar markers were also used in my area as County Line markers. This is a marker on the County Line between Fresno & Tulare Counties in California.

 

 

Hope this helps.

 

- Kewaneh

[Team Fawlty]

Thanks. It is actually on a peak 50' higher than and 300' from the road on forest preserve property. The forest preserve uses standard ROW markers similar (but shorter) to the ones you showed. It has a triangle on the top surrounding a hole as though it was used for triangulation.

 

Brendan

[+Shorelander]

I always assumed it was a Cook-DuPage county border marker. It looks like the boundary currently follows the Des Plaines River, but maybe it didn't always.

[Team Fawlty]

I always assumed it was a Cook-DuPage county border marker. It looks like the boundary currently follows the Des Plaines River, but maybe it didn't always.

 

That's a good call - some research is in order.

 

Brendan