Deadling Extension: The deadline to submit your RFP packet has been extended to September 25th, 2026

 

Southwest Public Power Agency, Inc. (“SPPA”) is seeking submissions for additional capacity resources to supply the needs of its customers and comply with upcoming planning reserve margin requirements.

SPPA is issuing this 2026 All-Source Request for Proposals (RFP) to seek the following:

• Capacity projects, as needed, for Summer 2028 to address load forecast changes and support customer demand.
• Up to 250 MW, with a minimum size of 25 MW blocks, of resources which will provide reliable capacity to meet year-round peak needs, overnight energy, reserve margin and the growing demand needs of large-load data centers. 

RFP Instructions:

2026_SPPA_All-Source_RFP.pdf

Frenquently Asked Questions (FAQ):

 Would non-source specific energy-only offers be considered?

No.

What is the preferred POD for SPPA and where are the loads serviced by this RFP located?

All major trading points where more than one BA are interconnected is preferable such as Pinnacle Peak, Westwing, Duke, etc. With that said, SPPA will entertain projects connected to the APS or WAPA transmission system. SPPA has a limited need in TEP or SRP BA. 

Are existing projects eligible or only new builds?

Both.

Are the only offers being considered for Summer 2028, or will Annual 7x24 offers be considered for 2027-2029 as well?

Looking for long term resources

What are the requirements for generation to be designated as capacity for this RFP? Is there a preferred sample confirm we can review?

Markets +

 Section 1 specifies that SPPA is seeking capacity projects for summer 2028. Is this a hard cutoff for COD, or would SPPA consider projects with later CODs? If flexible, is there an outer limit (e.g., 2029, 2030)?

Yes.

For purposes of evaluating proposals in this RFP, what methodology will SPPA use to assess a resource's capacity contribution (e.g., nameplate-based derate, duration-based table, ELCC estimate)? If SPPA plans to use Markets+ methodology once it has been finalized, how will capacity value be assessed for this RFP in the interim?

Markets+ and EDAM

Does SPPA anticipate issuing any additional ASRFPs in the next few years? 

Most likely.

Could you please clarify the Point of Delivery that will be considered for the SPPA All Source RFP ?

All points of delivery would be considered.

Does SPPA have a preferred month for project CODs in the summer of 2028? Would May be given preference over June?

June would be unpreferred.

Should bidders submit all proposal materials via email, or will there be a submission portal after we submit the NOIR?

All proposals will be submitted via email. There is no portal for submissions.

Attachment C references a guarantee, cash, or letter of credit as acceptable forms of credit. Would SPPA also consider a surety bond? 

SPPA would consider a surety bond.