October 13, 2017 To All Southern Natural Gas Shippers Re: Award of Firm Transportation Capacity in ROFR Open Season On September 13, 2017, Southern Natural Gas Company ("Southern") announced an open season to solicit bids for 3,574 dth/day of firm transportation capacity on Southern's south main system in Zone 3 that will become available effective September 1, 2018, subject to a right of first refusal (“ROFR”) by the current capacity holders. See Notice No. 701488 for details of the capacity that was posted. The open season concluded at 10:00 a.m. CCT on Wednesday, September 27, 2017. Southern did not receive bids for this capacity and the existing capacity holders elected not to retain the capacity after August 31, 2018. Therefore, this ROFR open season has concluded and no firm transportation capacity was awarded. The portion of the firm service agreements applicable to each package of capacity will terminate on August 31, 2018.