Summit Midstream Makes Final Investment Decision on Expanding Double E Pipeline's Mainline Compression

07:40 AM EDT, 08/31/2026 (MT Newswires) -- Summit Midstream (SMC) said Monday that Double E has reached a final investment decision on a mainline compression expansion, with the project expected to enter service in Q4 2028. The expansion includes installing a bi-directional mainline compressor station on the Double E pipeline, increasing its forward-haul capacity to Waha, Texas, by 900 million cubic feet per day, the company said. The project is expected to cost $100 million, net to Summit's 70% stake in the pipeline, it said. ExxonMobil (XOM) owns the remaining 30% interest. Summit added that it signed a new long-term take-or-pay firm transportation deal with an investment-grade shipper for 200 million cubic feet per day, expanding total contracted firm capacity on Double E to about 2.2 billion cubic feet per day. The expansion will be funded by Summit Permian Transmission's existing term facility and a $50 million committed accordion facility, Summit said. Summit shares were down 2% in Monday's premarket activity.