Q. Last summer, we built a fence around our back yard. We started by having the property marked for utilities, twice, then rented two different augers to try to dig the holes, making sure we stayed well away from the utility markings... While making one of the holes deeper, I struck an electric line that feeds our house. - DOUGLAS EDMUNDS, Bolingbrook, Ill. A. Dear Douglas: If only you'd dug a little faster, your case would've been a slam dunk...