New permanent residential services, including mobile homes, are not charged for secondary underground service. Underground service can be installed upon request for barns, wells, shops, storage buildings, and other non-permanent residences, but a charge will be incurred by the member. This charge is determined by YEC’s engineering department. Changing existing overhead service to underground will incur a higher charge. Underground service lines are more expensive to install than overhead services, but do not require as much maintenance.