Power Grid Rates Updated for Missouri Basin Potential SPP Join
Published Date: 7/11/2025
Notice
Summary
The Upper Great Plains region is updating its electricity transmission rates if it joins a new power group called Southwest Power Pool. These new rates will replace the old ones starting now and will last until 2030. This change affects customers who use these power services and could impact their bills depending on how the region expands its participation.
Analyzed Economic Effects
2 provisions identified: 0 benefits, 0 costs, 2 mixed.
Interim transmission and ancillary rates approved
You may be affected if you buy transmission or ancillary power services from the Upper Great Plains Pick-Sloan Missouri Basin Program–Eastern Division. The document confirms, approves, and places into effect on an interim basis new provisional formula rates for UGP’s transmission and ancillary services under the Southwest Power Pool Open Access Transmission Tariff.
New rates replace extended schedules through 2030
If the Upper Great Plains region expands its participation in the Southwest Power Pool in the Western Interconnection, the new formula rates under Rate Schedules WAUGP-ATRR, WAUGP-DCTIE-IMEU, and WAUGP-AS1 will supersede the extended formula rates under WAUGP-ATRR, WAUGP-AS1, WAUW-AS3, WAUW-AS4, WAUW-AS5, WAUW-AS6, and WAUW-AS7. The extended formula rates being superseded expire on September 30, 2030.
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Key Dates
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