SPP anticipates further expansion of its RTO service territory in the west and will integrate additional members beginning in 2027. Other western entities interested in joining SPP’s growing RTO ...

SPP, which has operated as an RTO since 2004, currently has 110 member companies in its Eastern Interconnection service territory of 552,885 square miles.

On March 30, 2025, FERC approved revisions to Southwest Power Pool, Inc.’s (“SPP”) Open Access Transmission Tariff (“Tariff”) and Governing Documents to allow nine entities (“Expansion ...

SPP's RTO footprint, which received initial FERC approval in October 2004, will grow to cover 17 states with this expansion.

The approval of SPP’s RTO West plan “is another major milestone for the market evolution in the Western part of the U.S.,” FERC Commissioner Judy Chang said.

The RTO expansion is separate from SPP’s day-ahead market for the Western Interconnection, which was approved by FERC earlier this year. That effort, known as Markets+, is set to launch in 2027.

Expanding the Southwest Power Pool Regional Transmission Organization into the Western Interconnection could produce a net total of $55 million to $73 million per year in savings depending on ...

SPP said it had engaged with parties interested in evaluating the benefits and requirements of RTO membership since October 20, 2020 and expansion of the SPP RTO was scheduled to go live on April ...

WESTMINSTER, CO (Sept. 21, 2022) — Expanding the Southwest Power Pool Regional Transmission Organization into the Western Interconnection could produce a net total of $55 million to $73 million ...

The Southwest Power Pool on Tuesday hosted what amounted to an online mixer for the air regulators from the 14 states in which SPP ensures electric system reliability and operates electricity markets.

Central U.S. power grid operator Southwest Power Pool (SPP) said on Wednesday that it had filed for approval to add western entities under its tariff to provide full regional transmission ...