SEMCO ENERGY Gas Company reminds customers to call MISS DIG (811) at least 3 days prior to doing any digging or excavation. With more people at home this spring, SEMCO has experienced an increase in line hits caused by people digging before calling MISS DIG. Michigan Law requires that if you plan to dig or excavate you must notify MISS DIG (811) at least 3 days in advance. It’s one phone call, it’s free and it could save your life.