Those are for the poles they put up (cat poles?). I was surprised how deep they go! Here are some pics I took (from my living room window) of them being placed at Duke & Water.
First they dug (drilled really) the hole, then put in the cylinder, then they filled it with concrete.
![[Image: yYoEMkU.jpg]](http://i.imgur.com/yYoEMkU.jpg)
First they dug (drilled really) the hole, then put in the cylinder, then they filled it with concrete.
![[Image: yYoEMkU.jpg]](http://i.imgur.com/yYoEMkU.jpg)
![[Image: DxBdf4f.jpg]](http://i.imgur.com/DxBdf4f.jpg)