A quick Google search for "mole rwpellent" turned up that moles do not like castor oil. You can make up your own solution (www.thriftyfun.com) or buy a premixed solution with a sprayer that attaches to your hose (www.bird-x.com/products/mole.html). (I have no connection with this pruduct and just gave it as an example.)

Traps are available (not for the squimish..they kill and trap at the same time) Also, there are gas bombs that look like flares available.