News
Southline Transmission Project brings power grid upgrades to southern Arizona
BENSON, Ariz. (KGUN) — A major transmission project is upgrading power infrastructure across southern Arizona to meet growing energy demands …
BENSON, Ariz. (KGUN) — A major transmission project is upgrading power infrastructure across southern Arizona to meet growing energy demands …
WILLCOX — The Willcox Chamber of Commerce and Agriculture hosted The State of the City, a networking event for local …
The American Southwest is a region rich in energy resources but transporting that power to communities that need it remains …
| Date | Title |
|---|---|
| February 2026 | New Mexico Overview |
| February 2026 | Arizona Overview |
| September 2024 | Western Interconnection Baseline Study |
| October 2023 | DOE Transmission Facilitation Program Event video |
| December 2022 | Landowner Open House Meeting Boards |
| 2016 | NEPA Environmental Review Documents |
| 2016 | NEPA Routing Report |
| 2016 | Record of Decision |
Building America's Next-Generation Infrastructure to Power Our Future.
Black Forest Partners and Grid United are co-developing Southline Transmission Project.
© 2026. Grid United LLC. All Rights Reserved.
Southline Transmission, LLC. invites the public to participate at a public hearing before the Arizona Power Plant and Transmission Line Siting Committee (Committee). Southline Transmission, LLC. is submitting an Application to amend the Certificate of Environmental Compatibility (CEC) granted by the Commitee in Line Siting Case No.173 (CEC 173) to obtain a CEC for the Apache to Vail Upgrade Route of the Southline Transmission Project.
January 12, 2026 | 1:00 PM – 5:30 PM
January 13 – 16, 2026, as needed | 9:00 AM – 5:00 PM
DoubleTree by Hilton Tuscon -Reid Park
445 South Alvernon Way, Tucson, AZ, 85711