QuestionI seem to have an underground natural well in one certain spot of my back yard. The water is constantly seeping up and making a big wet, muddy spot in the yard. Is there any way to stop the water from the well from coming up to ruin my lawn?
Answer I am not being evasive when I say "it depends".
First of all, are you sure that it is a natural spring or (artesian) well?
Here is a "Wikipedia" explanation.
"An artesian aquifer is a confined aquifer containing groundwater that will flow upward through a well without the need for pumping. Water may even reach the ground surface if the natural pressure is high enough, in which case the well is called a flowing artesian well. An aquifer provides the water for an artesian well. An aquifer is a layer of soft rock, like limestone or sandstone, that absorbs water from an inlet path. Porous stone is confined between impermeable rocks or clay. This keeps the pressure high, so when the water finds an outlet, it overcomes gravity and goes up instead of down.
The recharging of aquifers happens because the water table at its recharge zone is at a higher elevation than the head of the well."
That last paragraph is important; I do not know what you can do to 'cap' or utilise an artesian well. I suspect that it will need intervention by some regulatory agency.
If you have a sprinkler system there might be a leak in a 'hot' (supply) line. This kind of leak will be always flowing. To test this possibility, turn off the water at the source for a few days and see if the area dries out. The leak might be in a particular zone line and will flow only when the zone is 'ON'. Isolate this zone and see if the area dries out.
That is as much as I can help you on this mysterious problem.
