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Power plant capacity auction sees price surge in Missouri amid coal plant shutdown and transmission limits.

The Midcontinent Independent System Operator (MIS) has conducted its annual auction for power plant capacity, which saw prices rise to maximum levels in parts of Missouri for next fall and spring of 2025 due to a planned shutdown of a coal-fired power plant and limited transmission. The Planning Resource Auction measures supply for generating capacity against expected demand and is a component of overall electricity costs. Higher prices indicate that more capacity is needed. The North American Electric Reliability Corp. has identified areas at “high risk” of inadequate electricity supplies during periods of extreme cold and heat due to the retirement of aging fossil plants outpacing additions of new power supplies.

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