Irby Construction Company, a wholly owned subsidiary of Quanta Services, Inc., excels in the processes required for major tra ... nsmission, substation and distribution line construction and has demonstrated that ability with successful projects completed throughout the U.S. and Canada. With more than three quarters of a century of electric construction experience, Irby is a pioneer in the power line industry. We are proud of our record-setting accomplishments and stand ready to meet the challenges of the future. read more