Powering Strong Communities

MISO Board Approves $9 Billion Transmission Portfolio

The Board of Directors for the Midcontinent Independent System Operator on Dec. 7 approved the 2023 MISO Transmission Expansion Plan.

The 2023 MISO Transmission Expansion Plan (MTEP23) is the largest transmission expansion plan in MISO’s history both by volume and investment -- excluding the two years of accounted Multi-Value Projects/Long Range Transmission Planning portfolios.

The $9 billion in transmission enhancements will fund 572 projects addressing aging infrastructure, new load and added generation due to retiring traditional resources. These projects total over 700 miles of new or upgraded lines.  

Unlike typical MTEP cycles in which investment is spread across the region, $3.9 billion (or 43% of the total investment) is planned for projects in Louisiana and Texas, MISO said. This is largely in response to an increase in generation retirements and load associated with economic development.  

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