So I've got a 3 foot deep trench that I need to get footings formed up in this week. My concern is that there's a primary line, 7200 volts, about 6" under the bottom of the trench, and there's a good 4" of water in there. We're still waiting for the power company to run a new line, so eventually this will be dead, but currently it's live. Am I safe working in there or might I get bbq'ed?