Pump a Reasonable amount of Propane gas into Mole hole wait 1-2 minuets then drop in M-80, that will get them every time, just remember you gotta clear the area kinda fast.
Breaking News!
A Tulsa OK man was arrested today on charges of Domestic terrorism.
A person identified only as "27 Man" was being held on charges of conspiracy to obtain expolsives, detonation of a weapon of mass destruction, and various weapons violations.
When asked for comments, his only reply was, "They told me it'd work!".
General Attorney Holder was reported as saying "We have removed another dangerous terrorist off the streets today", and went on to state that He, along with the help of D.H.S. secretary of the Department of Homeland Security Janet Napolitano, were confident that this was the end of another terrorist cell working within the borders of the United States of America.
"Another great victory for us" was his parting statement.
ETA:
Old Bears solution is really one of the best, and will get rid of them.
If you can't do that, get up early in the morning when they're most active and wait for them to open up a new hole.
When they do, flood their burrow through an older hole with water and they'll usually pop up out of the most recent hole.
Stand by with bat/airgun/dawg and enjoy.
Note:
This will not work if it's an extensive system they've built.