I've had problems all summer as I've only killed 1 and I know there are more. I water my grass about 3 times a week in the summer and the neighbors around me don't water at all. It's been a dry summer and I feel like every mole in our neighborhood is under my lawn.
Buddy of mine suggested spraying MoleMax. I just did it this last weekend and used 2 bottles when it suggested 1 bottle for every 10,000 sq. ft. to get these bastards gone. You will see increased mole activity for a day or two. It's been less then a week but I think it might be working. It says it only keeps them away for about 3-4 months but come spring I'll either spray the boundary or the entire lawn again. God speed my friend!