Help. I have a frigging mole!!?

I have done some web research and determined the huge piles of dirt on my beautiful lawn are from a mole: volcano like, not horse shoe shaped. In the mornings, sometimes I can see the little dirt mounds moving - so he's an active booger. So far, I have thrown gas "bomb" (they look like giant firecrackers) into his ramps and runways. Yesterday he was active and I located the hole and direction of the tunnel and stuck a garden hose in there for 1 hour. The next morning, he mounded dirt on top of the hose that was still in the hole!! He's a terrorist. What can I do?