I have a low area on my lawn that really fills with water. During all of this rain we have had I would say the "mud pit" had about a six inches of standing water and about a foot or more of mud! I dug a trench about 18 inches wide and 18 inches deep. It runs along the edge and middle of the trouble area. The area to the side of the trench is pretty dry for the most part now. The trench is completely full of water. I have no place to run the water off to or I would. I dug a runoff hole to the side and it filled pretty quickly. My question.... Should I go ahead and fill the trench with gravel and a 4"pipe? Or should I try to make sure the trench is draining all out before I worry about filling it?