U.S. Energy Department Launches $5 Billion Effort to Expand Existing Transmission Capacity

The U.S. Energy Department on Sept. 24 announced its intention to fund 31 transmission upgrade projects across 26 states through its Speed to Power through Accelerated Reconductoring and other Key Advanced Transmission Technology Upgrades, or SPARK, initiative providing $1.9 billion in federal funding alongside $3.35 billion in recipient cost-sharing. The funding package, totaling $5.25 billion, is expected to strengthen grid reliability, lower electricity costs, and expand transmission capacity serving roughly 100 million customers by upgrading existing power lines rather than relying primarily on new transmission corridors.

The selected projects are expected to upgrade more than 1,500 miles of transmission lines by replacing existing conductors with higher-capacity equipment, while deploying grid-enhancing technologies across nearly 21,000 miles of the electric system. Together, these improvements are projected to unlock more than 23 gigawatts of additional electricity capacity, helping accommodate rising demand from households, businesses, and large industrial customers.

The initiative advances the administration’s broader energy agenda by emphasizing upgrades within existing rights-of-way instead of pursuing lengthy greenfield transmission projects that often require years of permitting and land acquisition. By expanding the capability of infrastructure already in service, the department expects the projects to reduce congestion, improve operational efficiency, and help utilities deliver electricity more reliably during periods of high demand.

Beyond increasing capacity, the upgrades are designed to improve resilience against extreme weather, reduce wildfire risks, and strengthen the security of the nation’s electric grid. Reconductoring existing lines can also shorten construction timelines compared with building entirely new transmission corridors, allowing additional capacity to reach the grid more quickly.

SPARK is funded through the Grid Resilience and Innovation Partnerships program, which supports projects that modernize critical electric infrastructure. Alongside the funding announcement, the department released an analysis of responses to its Speed to Power request for information, using industry feedback to help shape future funding opportunities and identify ways to accelerate transmission upgrades across the U.S.