1. Porterfield Surveying, Inc. 1610 N Imo Rd, Enid, OK 73703 Coordinate: 36.40894,-97.98196 Phone: (580) 233-0572
2. Porterfield Surveying Inc 1104 W Poplar Ave, Enid, OK 73703 Coordinate: 36.4105,-97.89265 Phone: (580) 233-0572