MISO’s MTEP24 transmission plan is making history as the largest transmission portfolio ever undertaken in the United States. This ambitious plan covers 488 projects stretching more than 5,000 miles across 15 states. These projects include local reliability improvements, the Long Range Transmission Planning (LRTP) Tranche 2.1 initiatives, and Joint Targeted Interconnection Queue (JTIQ) projects with Southwest Power Pool (SPP).

What’s Included in MTEP24?

MTEP24 is part of MISO’s ongoing effort to adapt the grid for the future as part of its Reliability Imperative. With energy demands and resources evolving rapidly, these projects are designed to keep the lights on for 45 million people—both today and for decades to come.

Here’s a quick breakdown of what’s included:

• Local Reliability Projects: 459 projects covering 932 miles. These focus on improving infrastructure and supporting growing energy needs across all 15 states in MISO’s region.
  
  
• Regional (LRTP) Projects: 24 regional projects that span 3,631 miles in the Midwest. This includes a robust 765kV transmission backbone for the future grid.
  
  
• Interregional (JTIQ) Projects: Five projects totaling 490 miles along the MISO-SPP shared border. These projects pave the way for 28 GW of new energy generation.

Why Does This Matter?

MISO’s CEO, John Bear, stressed the urgency of acting now to address the changing energy landscape. Vice President Aubrey Johnson also highlighted the importance of LRTP projects in ensuring the grid remains reliable for years to come.

The MTEP24 plan reflects a monumental collaborative effort. Over 300 stakeholder meetings brought together MISO members, stakeholders and staff to create a robust plan.

Looking Ahead

This landmark investment is more than just a response to today’s challenges—it’s a proactive step toward a more reliable and resilient energy grid for future generations. To dive deeper into the details, check out the full MTEP24 report.

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Hear from MISO's Vice President of System and Resource Planning, Aubrey Johnson, as he discusses the Long Range Transmission Planning journey.