Impossible to tell if water could travel that far from a leak. I doubt 30' but it depends on how the pipe was buried and the surrounding soil. If directly in the ground probably not. If buried in sand or something to protect it somewhat, maybe. Did you check if the hole fills with the pump running? Another question...In Oklahoma, what about freeze damage? Don't know the climate issues that well. My gut feeling is the leak is close to the hole. Wish I could be of more help.
Al