The board of Southwest Power Pool, the regional nonprofit company that oversees the transmission of electricity in 14 states, has approved an $8.6 billion plan to improve and expand that power grid.

"The 2025 Integrated Transmission Plan (ITP) identifies new and upgraded high voltage lines needed throughout the SPP footprint and which will produce the highest benefit-to-cost ratios in SPP's planning history," SPP said in a news release.

"The 2025 ITP addresses grid reliability, enables economic growth and supports strategic national interests," said Lanny Nickell, president and chief executive officer of SPP. "The plan reflects the power of collaboration and will deliver significant measurable benefits while readying our grid for the future."

SPP said the plan includes high-voltage tran

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