[miamicuse]

Mystery concrete cylinder buried in my yard

I have a number of 20x20 paver step stones in the backyard.


Some of these stones have been pushed up by tree roots. So this weekend I removed about a dozen of these step stones to expose the roots to see if I can do something about it.


I found a round concrete disc about 12" in diameter under one of the step stones. I thought it's a round step stone. Turned out it's thicker...Turned out it's A LOT thicker. Like 14" thick.

Any idea what this may be? It's solid. It's not sitting on anything, nothing but sand sitting under it.


There are two dots on top, it may be a metal handle that rusted out?

 

[Nealtw]

May have been a post footing for a deck or roof or ?? The dots may have been rebar to connect it to somethng else.

 

[Nickd83]

Could have been the cover to an old septic tank, that was repurposed. I have one similar, but trapezoidal shaped in our yard, must weigh 100#

 

[joed]

Looks like a sonotube concrete pour. It probably had something attached to it like a like clothes line pole or flag pole. It looks like a couple of bolts have been cut off when it was abandoned.

 

[miamicuse]

hmmm...if these are footing or anchors for something, then I should have at least a pair of these buried right?

 

[joed]

depends what it was for if there are more than one.

 

[ktownskier]

It is an Alien Landing zone marking post. The dots on it were for a latching handle. When it rusted off, the Aliens put the stepping stone on it to prevent other Aliens from using it anymore.

That's my story, and I'm sticking to it.