Recently approved slate of transmission projects will deliver cost-effective benefits

As electricity demand in the U.S. continues to grow, modernizing the transmission system is critical to ensure long-term grid reliability while expanding access to low-cost energy resources like wind, solar, and storage.

In December 2024, the Midcontinent Independent System Operator, a regional electric grid manager, approved Tranche 2.1-a $21.8 billion investment in 24 new transmission projects across the upper Midwest. The projects are part of a plan MISO develops annually to identify maintenance and upgrades for its infrastructure.

It is estimated that Tranche 2.1 would reduce curtailment i...