I had moles in the yard for a few years and nothing I did seemed to get rid of them, until... One day I noticed a man using one of those portable road roller machines that you usually see them using when paving road to "roll the lawn" in the neighborhood. Being tried of bumping around the yard with the lawn mower, I stopped by and asked his price. Since it was reasonable I asked if he could roll my lawn after he was finished. No more moles after that. The lawn rolling most likely collapsed all their little tunnels, along with the little trouble makers that lived in them. Getting rid of the moles was not the reason I had the lawn rolled, but it was a nice side benefit. I have the lawn rolled every few years due to frost heaves and haven't seen any evidence of moles since. To get rid of the mole you may need a road roller instead of those little rollers that you can push or drag behind a riding mower. You'll need something heavy enough to collapse the tunnels. Oh and mowing the lawn is no longer a bumpy experience :)

Jott