I was wondering about the underground stream you mentioned in your backyard, could you describe what you know about it?
The stream is rather small, bubbles up in my yard for about two feet depositing a good amount of water then goes underground, bubbles up four houses down (about 150' away) and they have significant flooding in their yard year round, then goes underground, until it emerges in the field behind our houses in the form of a pond. County records show the area at the back edge of my yard as documented wetland. When there is a lot of rain or snow, the ground is too saturated from the stream I get severe flooding in the backyard. My ditch follows the stream along the backyard, then up the side of the house to the street. The water in the stream has a sulphur odor and porous soil characteristic of a wetland stream.