SPP Website
SPP Member List
Cost-Benefit Analysis
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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
