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Mid-America Interconnected
Network , MAIN
- MAIN Reliability Region
- MAIN OASIS
- Alliant [ALT]
- Ameren [AMRN] - move to SERC
- Associated Electric Cooperative, Inc. [AECI]
- Central Illinois Light Company [CIL]
- City Water, Light and Power [DWLP]
- Commonwealth Edison Company [CE]
- see Exelon on Multi-Regional Companies page
- Entergy [EES]
- Illinois Power [IP]
- Southern Illinois Power Cooperative [SIPC]
- Upper Peninsula Power Company [UPP]
- Wisconsin Electric Power [WEP]
- Wisconsin Public Service Corporation [WPS]
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