I have a spot in the rear corner of the yard which is perpetually green and stays "squishy" all year round even when the rest of the ground is frozen solid. I talked to the public works department and they told me that my development was put in with all public sewer so no chance of an old septic anywhere. Also, all sewer pipes go through the front yard. They also mentioned to me that it's more than likely a natural spring since they are very common in the area. I was hoping to use this area for a garden and was also thinking of building a small pole barn (16x24) nearby. As it stands now I'm worried that the garden will become a swamp and the pole barn will sink-is there anything I can do?