SPP

Map of SPP areas, which include Oklahoma, Kansas, Nebraska, and parts of South Dakota, North Dakota, Montana, Missouri, Arkansas, and Texas.

Founded as an 11-member tight power pool in 1941, Southwest Power Pool (SPP) achieved RTO status in 2004, ensuring reliable power supplies, adequate transmission infrastructure, and competitive wholesale electricity prices for its members. Based in Little Rock, Ark., SPP manages transmission in portions of fourteen states: Arkansas, Iowa, Kansas, Louisiana, Minnesota, Missouri, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, South Dakota, Texas and Wyoming. Its membership is comprised of investor-owned utilities, municipal systems, generation and transmission cooperatives, state authorities, independent power producers, power marketers and independent transmission companies.

In 2007, SPP began operating its real-time Energy Imbalance Service (EIS) market. In the same year, SPP became a FERC-approved Regional Entity. The SPP Regional Entity serves as the reliability coordinator for the NERC region, overseeing compliance with reliability standards.

In March 2014, SPP implemented its Integrated Marketplace that includes a day-ahead energy market, a real-time energy market, and an operating reserve market. SPP’s Integrated Marketplace also includes a market for Transmission Congestion Rights. The SPP Integrated Marketplace co-optimizes the deployment of energy and operating reserves to dispatch resources on a least-cost basis.

In 2015, SPP expanded its footprint incorporating the Western Area Power Administration – Upper Great Plains (WAPA-UGP) region, the Basin Electric Power Cooperative, and the Heartlands Consumer Power District. The expansion nearly doubled SPP’s service territory by square miles, adding more the 5,000 MW of peak demand and over 7,000 MW of generating capacity. WAPA-UGP is the first federal power marketing administration to join an RTO.

List of Orders

Click on the categories below to view additional information.

Docket No.	Date Issued	Company	Title
EL26-68-000	06/18/26	Southwest Power Pool, Inc.	Order Instituting Proceeding Under Section 206 of the Federal Power Act \| News Release \| Fact Sheet \| Presentation
ER26-407-001	05/21/26	Southwest Power Pool, Inc.	Order Addressing Arguments Raised on Rehearing
ER25-177-000	03/19/26	Southwest Power Pool, Inc.	The order accepts Southwest Power Pool, Inc.’s proposed revisions to its tariff to implement a System Support Resource program to ensure the reliability of the transmission system when a generating resource seeks to retire.
EL25-106-000	01/22/26	New England Power Generators Association v. ISO New England	Order Addressing Arguments Raised on Rehearing
ER24-2026-001	01/22/26	Southwest Power Pool	Order on Compliance

Docket No.	Date Issued	Company	Title
ER16-1341-003	09/18/25	Southwest Power Pool, Inc	Order on Refund Plan
ER22-1697-003	09/18/25	Southwest Power Pool, Inc	Order on Compliance Filing
ER24-2026-000	06/26/25	Southwest Power Pool	Order on Compliance
ER24-1658-003	04/17/25	Southwest Power Pool, Inc.	Letter Order Accepting Proposed Tariff Revisions
ER24-2184-000	03/20/25	Southwest Power Pool, Inc.	Order Accepting Tariff Revisions, Subject to Condition
ER24-2906-000	03/20/25	Southwest Power Pool, Inc.	Order Accepting Tariff Revisions
ER24-2397-001	03/20/25	Southwest Power Pool, Inc.	Order Addressing Arguments Raised on Rehearing
ER24-1658-000	01/16/25	Southwest Power Pool, Inc.	Order Accepting Proposed Tariff, Subject to Condition
ER24-1317-000	01/16/25	Southwest Power Pool, Inc.	Order Accepting and Suspending Proposed Tariff Revisions, Consolidating Proceedings, and Establishing Paper Hearing Procedures
ER25-138-000	01/16/25	Southwest Power Pool, Inc	Order Accepting Tariff Revisions

Docket No.	Date Issued	Company	Title
ER24-1221-001	10/17/24	Southwest Power Pool, Inc.	Order on Compliance Filing
ER24-2570-000	09/19/24	Southwest Power Pool, Inc	Order Accepting Tariff Revisions
ER24-289-000	07/25/24	Southwest Power Pool, Inc.	Order on Compliance Filing
ER24-1775-000	07/25/24	Southwest Power Pool, Inc.	Letter Order accepting proposed Tariff Revisions
ER24-1775-000	07/25/24	Southwest Power Pool, Inc.	Letter Order accepting proposed Tariff Revisions
ER22-1697-002	06/27/24	Southwest Power Pool, Inc	Order Addressing Arguments Raised On Rehearing And Granting Clarification In Part
ER24-1221-000	05/23/24	Southwest Power Pool, Inc.	Order on Compliance Filing

Docket No.	Date Issued	Company	Title
ER22-2339-001	12/19/23	Southwest Power Pool, Inc.	Order on Compliance Filing
ER22-1846-004	12/19/23	Southwest Power Pool, Inc.	Order Addressing Arguments Raised on Rehearing
ER23-2183-000	12/19/23	Southwest Power Pool, Inc.	Order Rejecting Tariff Revisions
ER22-2339-000	05/18/23	Southwest Power Pool, Inc.	Order on Compliance Filing
EL22-59-001	04/20/23	Tenaska Clear Creek Wind, LLC v. Southwest Power Pool, Inc. Midcontinent Independent System Operator, Inc. Associated Electric Cooperative, Inc. Tennessee Valley Authority	Order Addressing Arguments Raised on Rehearing
ER22-2371-001	02/16/23	Southwest Power Pool, Inc.	Letter Order Approving Settlement
EL21-77-003	02/16/23	Tenaska Clear Creek Wind, LLC v. Southwest Power Pool, Inc.	Order Addressing Arguments Raised on Rehearing and Denying Motion for Stay
EL22-30-001	02/16/23	Southwestern Public Service Company v. Southwest Power Pool, Inc.	Order Addressing Arguments Raised on Rehearing
ER22-709-003	02/16/23	Southwest Power Pool, Inc.	Order Addressing Arguments Raised on Rehearing
EL22-54-001	01/19/23	Southwest Power Pool, Inc.	Order Addressing Arguments Raised on Rehearing
RM22-3-000 ER18-2358-006 ER19-1357-004 ER20-1313-001 consolidated	01/19/23	Southwest Power Pool, Inc. GridLiance High Plains LLC	Order Addressing Arguments Raised on Rehearing and Granting Clarification

Docket No.	Date Issued	Company	Title
EL22-59-000	12/15/22	Tenaska Clear Creek Wind, LLC v. Southwest Power Pool, Inc., Midcontinent Independent System Operator, Inc., Associated Electric Cooperative, Inc. and Tennessee Valley Authority	Order Denying Complaint and Petition
EL19-77-00	11/17/22	Oklahoma Gas and Electric Company v. Southwest Power Pool, Inc.	Order on Complaint
ER18-2404-001	11/17/22	Southwest Power Pool, Inc.	Order Addressing Arguments Raised On Rehearing And Denying Request For Remedial Relief
EL19-93-000	11/17/22	Western Farmers Electric Cooperative v. Southwest Power Pool, Inc.	Order on Complaint
EL19-96-000	11/17/22	Cimarron Windpower II, LLC v. Southwest Power Pool, Inc.	Order on Complaint
EL19-93-00	11/17/22	Western Farmers Electric Cooperative v. Southwest Power Pool, Inc.	Order on Complaint

2021

Docket No.	Date Issued	Company	Title
ER18-2404-000	03/18/2021	Southwest Power Pool, Inc.	Order Denying Waiver Request
ER19-477-000	03/18/2021	Southwest Power Pool, Inc.	Order Denying Waiver Request
ER18-99-004	02/18/2021	Southwest Power Pool, Inc. Settlement	Order Rejecting Contested Settlement
ER20-945-002	02/18/2021	Southwest Power Pool, Inc.	Letter Order on Compliance Filing
ER15-2115-008	02/18/2021	Southwest Power Pool, Inc.	Letter Order Approving Uncontested Settlement Agreement

2020

Docket No.	Date Issued	Company	Title
ER18-2358-004	11/19/20	Southwest Power Pool, Inc	Order Addressing Arguments Raised on Rehearing
ER20-644-000	07/16/20	Southwest Power Pool, Inc.	Order on Compliance
ER20-1617-000	07/16/20	Southwest Power Pool, Inc.	Order Accepting Tariff Revisions
ER19-460-005	07/16/20	Southwest Power Pool, Inc.	Order on Compliance
ER19-2522-002	07/16/20	Southwest Power Pool, Inc.	Order on Compliance
ER19-1954-001	06/18/20	Southwest Power Pool, Inc.	Order on Compliance
EL19-92-000	06/18/20	Southwest Power Pool, Inc.	Order on Section 206 Investigation
EL16-91-001	05/21/20	Southwest Power Pool, Inc.	Order Granting Rehearing and Dismissing Compliance Filing
ER15-2115-004	02/20/20	Southwest Power Pool, Inc.	Order on Rehearing and Clarification
ER15-2028-003	02/20/20	Southwest Power Pool, Inc.	Order on Rehearing and Clarification
ER16-1341-003	02/20/20	Southwest Power Pool, Inc.	Order Denying Motion
ER16-1341-004	02/20/20	Southwest Power Pool, Inc.	Order on Rehearing and Clarification
ER19-1954-000	01/23/20	Southwest Power Pool, Inc.	Order on Complaints
EL19-62-001	01/23/20	City Utilities of Springfield, Missouri v. Southwest Power Pool, Inc.	Order on Rehearing and Clarification

2019

Docket No.	Date Issued	Company	Title
EL19-11-001	12/19/19	American Wind Energy Association and The Wind Coalition v. Southwest Power Pool, Inc.	Order on Rehearing, Compliance, and Section 205 Filing
ER19-2681-000	11/21/19	Southwest Power Pool, Inc.	Order Accepting Tariff Revisions
ER19-1910-000	11/21/19	Southwest Power Pool, Inc.	Letter Order Approving Uncontested Settlement Agreement
ER19-1357-000, ER18-2358-001	10/17/19	GridLiance High Plains LLC, and Southwest Power Pool, Inc.	Order Establishing Hearing and Settlement Judge Procedures and Consolidating Proceedings
ER19-460-001	10/17/19	Southwest Power Pool, Inc.	Order on Compliance Filing and Instituting Section 206 Proceeding
ER19-2273-000	09/19/19	Southwest Power Pool, Inc. and Sunflower Electric Power Corporation	Order Accepting Proposed Tariff Revisions and Establishing Hearing and Settlement Judge Procedures
EL17-89-000	09/19/19	American Electric Power Service Corporation v. Midcontinent Independent System Operator, Inc. and Southwest Power Pool, Inc.	Order Establishing Briefing Procedures
EL18-26-000	09/19/19	EDF Renewable Energy, Inc. v. Midcontinent Independent System Operator, Inc., Southwest Power Pool, Inc. and PJM Interconnection, L.L.C	Order on Complaint and Technical Conference
EL17-89-000	09/19/19	American Electric Power Service Corporation v. Midcontinent Independent System Operator, Inc. and Southwest Power Pool, Inc.	Order On Complaint And Establishing Refund Effective Date
ER15-2115-000	06/20/19	Southwest Power Pool, Inc.	Order on Contested Settlement
ER15-2028-000	06/20/19	Southwest Power Pool, Inc.	Order on Contested Settlement
ER17-1568-002	04/18/19	Southwest Power Pool, Inc.	Order Granting Requests for Extension of Effective Dates
EL19-11-000	04/18/19	American Wind Energy Association The Wind Coalition v. Southwest Power Pool, Inc.	Order on Complaint
ER18-2318-000	03/21/19	Southwest Power Pool, Inc.	Order on Compliance filing for Order No. 844
ER16-204-004	01/17/19	Southwest Power Pool, Inc.	Opinion No. 562-A; Order Denying Rehearing

2018

Docket No.	Date Issued	Company	Title
ER19-166-000	12/20/18	Southwest Power Pool, Inc.	Letter Order on Tariff Revisions
EL18-194-000	12/20/18	Nebraska Public Power District v. Tri-State Generation and Transmission Association, Inc. and Southwest Power Pool, Inc.	Order Denying Complaint
ER18-1632-001	10/18/18	Southwest Power Pool, Inc.	Order Accepting Tariff Revisions
EL16-110-002, EL17-69-001	05/17/18	Buffalo Dunes Wind Project, LLC, Enel Green Power North America, Inc., Alabama Power Company, and Southern Company Services, Inc. v. Southwest Power Pool, Inc.	Order Denying Rehearing
ER17-1575-002	05/17/18	Southwest Power Pool, Inc.	Order Denying Rehearing
ER16-204-001	05/17/18	Southwest Power Pool, Inc.	Opinion No. 562 Order On Initial Decision
ER17-2229-001	04/19/18	Southwest Power Pool, Inc.	Order Denying Rehearing
ER18-99-000	03/15/18	Southwest Power Pool, Inc.	Order Accepting Proposed Tariff Revisions, Subject to Refund, and Establishing Hearing and Settlement Judge Procedures
EL18-20-000	03/15/18	Indicated SPP Transmisson Owners v. Southwest Power Pool, Inc.	Order Denying Complaint
ER17-2495-000	01/18/18	Southwest Power Pool, Inc.	Letter Order Approving Repricing Request

2017

Docket No.	Date Issued	Company	Title
ER17-426-000, ER17-426-002	12/21/17	Southwest Power Pool, Inc.	Letter Order Approving Uncontested Settlement
ER17-1741-000, ER17-1741-001	12/21/17	Southwest Power Pool, Inc.	Letter Order Approving Uncontested Settlement
ER17-2027-000, ER17-2027-001	12/21/17	Southwest Power Pool, Inc.	Order Accepting Tariff Revisions
ER18-208-000	12/21/17	Southwest Power Pool, Inc.	Order Accepting Service Agreement
EL18-35-000	12/21/17	Southwest Power Pool, Inc.	Order Instituting Section 206 Proceeding and Paper Hearing
ER17-1482-000	11/16/17	Southwest Power Pool, Inc.	Order Accepting Tariff Revisions, Subject to Condition
ER17-889-000	11/16/17	Southwest Power Pool, Inc.	Order on Service Agreement
EL16-91-000, EL18-19-000	10/19/17	Southwest Power Pool, Inc.	Order On Paper Hearing And Instituting Section 206 Proceeding, Establishing Refund Effective Date, And Consolidating Proceedings
ER17-1575-000, -001	10/19/17	Southwest Power Pool, Inc.	Order Rejecting Tariff Revisions And Denying Request For Rehearing And Clarification
EL17-69-000	10/19/17	Buffalo Dunes Wind Project, LLC, Enel Green Power North America, Inc., Alabama Power Company, and Southern Company Services, Inc. Vs Southwest Power Pool, Inc.	Order on Complaint
EL17-11-000	10/19/17	Alabama Power Company v. Southwest Power Pool, Inc.	Order on Complaint
ER16-1286-002, EL16-110-001	10/19/17	Southwest Power Pool, Inc.	Order Granting Clarification
EL16-110-000	10/19/17	Southwest Power Pool, Inc.	Order on Paper Hearing
ER17-772-000, -001, -002	09/20/17	Southwest Power Pool, Inc.	Order On Compliance Filing
ER17-520-000	09/20/17	Southwest Power Pool, Inc.	Order Accepting Tariff Revisions
ER17-1333-000	09/20/17	Southwest Power Pool, Inc.	Order on Tariff Filing
ER16-204-001	02/23/17	Southwest Power Pool, Inc.	Initial Decision

2016

Docket No.	Date Issued	Company	Title
ER12-959-007	07/21/16	Southwest Power Pool, Inc.	Order On Remand
ER16-791-000	07/21/16	Southwest Power Pool, Inc.	Order Granting In Part, And Denying In Part, Motion For Clarification
EL16-91-000	07/21/16	Southwest Power Pool, Inc.	Order Instituting Section 206 Proceeding and Commencing Paper Hearing Procedures and Establishing Refund Effective Date
ER16-1774-000	07/21/16	Southwest Power Pool, Inc.	Order Accepting Tariff Revisions Implementing Formula Rates and Establishing Hearing and Settlement Judge Procedures
ER16-13-002	07/21/16	Southwest Power Pool, Inc.	Letter Order on Compliance Filing
ER16-209-001	06/16/16	Southwest Power Pool, Inc.	Order Granting Clarification and Denying Rehearing
ER14-2850-006 and ER14-2851-006	05/19/16	Southwest Power Pool, Inc.	Letter Order Approving Settlement
EL12-60-001 and ER12-1586-002, -003	04/21/16	Southwest Power Pool, Inc., Western Area Power Administration, Basin Electric Power Cooperative, Heartland Consumers Power District and Southwest Power Pool, Inc.	Order on Clarification, Rehearing, and Compliance
ER14-2850-004 and ER14-2851-004	04/21/16	Southwest Power Pool, Inc.	Letter Order Approving Settlement
ER16-139-000, -001	03/17/16	Southwest Power Pool, Inc.	Letter Order Accepting Tariff Revisions
ER16-636-000	03/17/16	Southwest Power Pool, Inc.	Order Granting Tariff Waiver Request
ER14-1174-000, EL11-34-002, EL14-21-000 & EL14-30-000	01/21/16	Midcontinent Independent System Operator, Inc. v. Southwest Power Pool, Inc.	Letter Order on Uncontested Settlement
ER14-1174-001, EL11-34-003, EL14-21-001 & EL14-30-001	01/21/16	Midcontinent Independent System Operator, Inc. v. Southwest Power Pool, Inc.	Order Dismissing Requests For Rehearing As Moot

Quick Links

Contact Information

Mark Armamentos

Telephone: 202-502-8103

Email: [email protected]

Recent News

Summaries | June 2026 Commission Meeting

FERC Launches Aggressive Targeted Action to Speed Large Load Integration

Fact Sheet | FERC Takes Action to Supercharge America’s Grid for Efficiency, Reliability, and a Bold Energy Future

Upcoming Events

List of Orders

Quick Links

Contact Information