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High-voltage transmission is surging in the U.S. after a decade-long lull

Brief

High-voltage transmission is surging in the U.S. after a decade-long lull: 888 miles of 345 kV+ lines were completed in 2024 (vs. ~4,000 in 2013). Planned spending jumped—PJM from $920M (2021) to ~$12B (2025)—and utilities plan $1.4T by 2030 (about half T&D). Some former boosters resist public cost-sharing even as private demand (data centers, Permian) is ready to pay.

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