DALLAS--(BUSINESS WIRE)--Transwestern Pipeline Company, LLC (Transwestern), a subsidiary of Energy Transfer LP (NYSE: ET), today announced the launch of a binding open season for an expansion of its system in Texas, New Mexico and Arizona to transport supplies of natural gas in the Permian Basin to markets in the Desert Southwest. The open season begins at 12:00 p.m. CDT on September 26, 2025, and ends at 12:00 p.m. CDT on October 25, 2025. The Desert Southwest expansion project is a combinatio. ...