OK all, I will give you the Rachael Carson special mole repellent. Mr Jim AKA Groundskprs has stated above that if you check mole tunnels do not stay long the foot steps drive them away. Well search old post and you will find that I have stated many times before that tacky lawn windmills on a wire rod will vibrate and drive them away. No I have no university studies on this only my own experience and many wives tales. Northern tool sells the introductory Al Gore Electric vibrating mole repellent. They work on 2 D cell battery and should last about 6 months. I have never tried the Al Gore Model but think it will work more than 50% but the Bush's will still win here in Florida.