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Southwest Power Pool (SPP) has approved an $8.6 billion investment to expand and modernize its electric transmission network across a 14-state region, marking one of the largest grid development initiatives in its history.

The 2025 Integrated Transmission Plan (ITP) outlines new and upgraded high-voltage lines designed to enhance reliability, support economic growth, and meet rising electricity demand. The plan includes a regional 765-kilovolt (kV) transmission backbone, intended to deliver more power over longer distances with higher efficiency and lower energy loss.

According to SPP, the projects are expected to return between $12 and $18 in regional benefits for every $1 invested, representing the most cost-effective portfolio in the organization’s planning history.

The initiative also aims to accommodate growing power needs driven by population growth, industrial expansion, and new energy technologies. SPP projects that electricity demand in its region — including Oklahoma — could increase by as much as 100% over the next decade.

Lanny Nickell, SPP President and CEO, said the plan “addresses grid reliability, enables economic growth, and supports strategic national interests.” Casey Cathey, Vice President of Engineering, added that the projects will ensure the grid is “ready for the demands of tomorrow.”

The transmission expansion will be developed over several years, with construction timelines varying by project.

Source: okenergytoday.com