Re: wet soil under house
Based on your description it certainly sounds like this is the case.
I had the city shut off my water for a week, and my cellar dried up.
Could the water be leaking from the main supply underground and 'traveling' under the house?
It would seem your water meter must be inside the house ..... otherwise there would have been some large water bills.
It may be leaking outside the home at the point where it enters the cellar ( guessing that's where the line comes in ).
Likely that would be where the digging should start and working toward where it meets the city feed.
Depending on where you live will determine how deep the water line will be.
Hope this helps and good luck.
"" an ounce of perception -- a pound of obscure "