SPP's new five-year strategic plan includes increasing its footprint in the Western Interconnection.

SPP continues to spread its footprint with an announcement Tuesday that it will operate Northwest Power Pool’s resource adequacy (RA) program in the Western Interconnection. The RTO will work with NWPP and its RA participants to help develop, implement and operate the program. As a program operator, SPP will perform forward-showing and operations program functions, …

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Arizona has joined Colorado, Nevada and Oregon in exploring membership in an RTO in the Western Interconnection.

SPP is closing to setting a date by which interested members of its WEIS market must commit to full RTO membership.