Simply put, trapping the moles that are currently damaging your lawn or landscaping may not be an end-all or permanent solution to a mole problem. Because recolonization is likely, trapping is the only way to keep up with a mole problem. In some Northern states, especially Michigan and Wisconsin, mole tunnels can be used by more than one species of mole. Trapping records show both Eastern and Star-nose taken from the same tunnel system. Current damage also can give no indication as to the number of moles that will have to be trapped out.
Most experts describe two tunnel types.
These tunnels resemble varicose veins and seem to stem-out in all direction. The damage is heavy and will come and go seasonally. A permanent tunnel may be constructed to connect these feeding areas. These tunnels are usually placed along or under man-made borders such as timbers or foundations. Bolt runs will connect two feeding areas and will appear fairly straight.