Hi! Our septic tank field goes slightly downhill from the tank. The end of the field is about 100 ft. from the tank and has a huge "hole" filled with gravel. That area has now become a wet spot and sometimes trickles into the dirt road in front of the house. We had the tank pumped a couple weeks ago. The area dried up for a couple of days, then, bam!, became wet again. We have a 1,200-gal. tank and there are two of us at home. The field "line" to the end is greener, so water is seeping out along the perforated line. What's our problem and how do we repair it Thank you!

First your leaching field may be too small or plugged or collasped.
How old is the system
Next try a couple of boxes of enzyme digester like Rid-X
this may reopen plugged lines but not damaged lines
also dye test your toilets
Use red food coloring place a few drops in the tank just before you go to bed and see if it is in the toilet bowl the next moring if so than your toilet is leaking a steady stream of water into your tank
if not
the water table may be filling your tank