As one of 91ÖÆÆ¬³§â€™s largest, long-time clients, the partnership with Enbridge was established working with Union Gas in 1999 – a company that was later acquired by Enbridge to form Enbridge Gas Inc. 91ÖÆÆ¬³§ is proud to be one of Enbridge’s preferred contractors, working closely within the Alliance to reduce the cost of construction while delivering consistently with a high level of quality and strong safety performance.