KANSAS CITY — SPP state regulators have approved a policy that establishes criteria for developing joint transmission projects with other RTOs to cost-effectively address persistent market-to-market (M2M) congestion.
SPP intends to use the targeted market efficiency projects (TMEPs) to resolve M2M congestion that has resulted in millions of dollars of charges on its seam with MISO. SPP’s neighbor already uses TMEPs on its PJM seam.
The cost of each project would be allocated between SPP and MISO based on the ratio of historical congestion costs, adjusted for M2M settlement effects. The interregional cost allocation would be recovered through the regionwide annual transmission review requirements.
Louisiana and Texas voted against the policy over cost-allocation concerns during the SPP Regional State Committee’s Aug. 4 meeting. Attorney Dana Shelton, proxy for Louisiana Public Service Commissioner Mike Francis, expressed concern about “the allocation on a regionwide basis in the absence of showing a regionwide benefit.”
Minnesota Public Utilities Commissioner John Tuma questioned the reluctance to talk about market efficiencies, saying TMEPs will benefit only SPP’s ratepayers.
“This concept is about creating market-to-market benefits for our ratepayers. I think exploring it is only in our best interest at this stage,” he said. “Minnesota has joined this organization because we are one of those seams organizations, and we do see the benefit of these [M2M] efforts. Is this a big one? No … but it’s the kind of thing that will help us out in the long run.”
The TMEPs would apply only to M2M flowgates along the MISO seam with a minimum of at least $1 million in historical congestion costs. Staff are proposing a $20 million project cap with an in-service time frame of three years and a four-year payback of avoided congestion costs.
SPP’s Clint Savoy told the RSC that RTO staff is trying to filter the list of constraints they want to fix as part of the biennial joint system study with MISO. He said staff will use historical market data to find operating days when constraints bound in the day-ahead market. They will calculate the production cost for the entire market, remove the constraint and rerun the production cost analysis.
“The change in production cost is essentially the benefit that SPP receives, so it’s a reduction in the production cost for the market as a whole,” Savoy said.
The committee agreed with staff’s recommendation to stop moving a tariff change (RR681) that allocates costs of seams projects outside the FERC Order 1000 interregional process. Instead, it remanded the issue back to the Cost Allocation Working Group to address stakeholder concerns and asked it to provide an update during the RSC’s November meeting.
The Markets and Operations Policy Committee rejected the proposal during its July meeting with only 54.9% approval. Members were uncomfortable about whether the projects would be subject to the grid operator’s competitive process screening. (See “Seams Cost Allocation Rejected,” SPP MOPC Briefs: July 15-16, 2025.)
The RSC also granted CAWG’s request to delay the annual stakeholder review of the Safe Harbor Limit, which sets designated resources’ eligibility for base-plan funding at costs less than or equal to $180,000/MW. The working group said the delay was necessary because of “significant changes in SPP processes.”
Bylaw Change for Western RTO
The RSC approved an amendment to its bylaws that will allow western commissioners to join the committee upon the RTO’s expansion into the West in 2026. The expansion will make the Arizona, Colorado and Utah commissions eligible to add representatives to the committee.
Commissioners will be able to vote on proposed policy or tariff changes and other matters only if the proposal applies to the interconnection where their state is located. As Nebraska, New Mexico and South Dakota straddle both interconnections, those states will be limited to one vote if the proposal applies to both regions.
The Western commissioners will be eligible to join the RSC after April 1, 2026, when the RTO expansion goes live. Staff said vendors are successfully building and testing market systems, with member testing to begin in September.
Three Western commissioners sat in on the meetings: Arizona’s Kevin Thompson, New Mexico’s Greg Nibert and Wyoming’s Mike Robinson. Missouri’s Glen Kolkmeyer also was a guest although his chair, Kayla Hahn, represents the state on the RSC.
The committee also endorsed a three-person Nominating Committee consisting of RSC President Patrick O’Connell, South Dakota’s Kristie Fiegen and Tuma that will recommend the 2026 leadership during the November meeting. It also approved a 2026 budget that passes $1 million for the first time ($1.18 million) by including an extra $500,000 for consulting services and making allowances for increased membership.
Employee No. 3 Speaks out
Bruce Rew, who recently announced his pending retirement from SPP as senior vice president of operations, was greeted with a round of applause before one of his last updates during the Joint Stakeholder Briefing following the RSC meeting. (See SPP’s Rew to Retire After 35 Years in Operations.)
“Bruce reminds us he was Employee No. 3. I’m not sure 1 and 2 are still alive, but Bruce has had a remarkable career at SPP,” board Vice Chair Ray Hepper said, teasing the 35-year veteran. “So this may be among your last opportunities to really chew on Bruce in a board meeting.”
Rew said SPP has issued only one resource advisory thus far in 2025, which lasted two days in April, compared with five in 2024. During that period, demand peaked for the year at 56.6 GW, about 1,500 MW below the all-time high. Despite the demand but with negative LMPs, staff were able to export almost 5 GW of energy to MISO and PJM June 25-26 when the RTOs’ solar power vanished during the evening hours.
“As we gain more and more solar, that’s something that we’re going to continue to manage operationally to make sure that we’re prepared for that as well,” Rew said. “We potentially could have that same experience if we get 5 or 10,000 MW of solar.”
It will be a while yet. The grid operator recently added its first gigawatt of solar capacity, complementing its 35.6 GW of wind capacity. It has added more than 3 GW of capacity in the past year, pushing its registered capacity past 100 GW.
SPP has published a report on the April 26 load shed event near Shreveport, La., one of three in the footprint this year. The report analyzes the event, identifies the main causes, examines SPP’s response and provides recommendations and improvements to prevent similar incidents in the future. (See SPP Addresses 3rd Load Shed Since March 31.)
SPP Lays out Market Principles
Carrie Simpson, SPP vice president of markets, followed Rew to the podium and discussed the priorities for market design changes set in a staff white paper that is circulating: price discovery and transparency, economic efficiency, reliability effectiveness and system performance.
Referencing the 5 GW of exports to MISO and SPP, Simpson called it the result of a “healthy seam.”
“It’s a good indication … that our pricing was supporting the rest of the interconnection, because people were able to buy from us and sell into MISO and PJM,” she said. “Had these exports not occurred, our LMPs would have been significantly even lower because we would have had to back down even more generation. And so just a good indication of the market working well and the signals being available to participants to take action and move power where it was needed or more efficiently needed in the interconnection.”



