I am just starting to build a deck. I dug the holes for my posts. I live in Michigan, frost line is 42". I dug down to 48" with the intent of putting a 6" pole barn biscuit to use as the footing.
In 2-3 holes, they immediately filled with water after getting to depth. I'm not sure if the water table is just super high, or what's going on. It was not rain related as everything was dry during this time.
As I understand it, as long as the water is pooling under 42", it shouldn't be an issue. It's below the frost line, thus won't freeze. It's at the footing height or under, thus won't deteriorate the post.
Is that correct understanding? If for some reason the water is pooling above 42", what corrective actions can I take?
I was thinking I would dig down another 1' and fill it with gravel. Then put the biscuit on top of there. I'm just concerned that it will still result in water pooling above 42" though.