MISO operates the transmission system and a centrally dispatched market in portions of 15 states in the Midwest and the South, extending from Michigan and Indiana to Montana and from the Canadian border to the southern extremes of Louisiana and Mississippi. The system is operated from three control centers: Carmel, Indiana; Eagan, Minnesota; and Little Rock, Arkansas. MISO also serves as the reliability coordinator for additional systems outside of its market area, primarily to the north and northwest of the market footprint.
MISO was not a power pool before organizing as an ISO in December 2001. It began market operations in April 2005. In January 2009, MISO started operating an ancillary services market and combined its 24 separate balancing areas into a single balancing area. In 2013, the RTO began operations in the MISO South region, including the utility footprints of Entergy, Cleco, and South Mississippi Electric Power Association, among others, in parts of Arkansas, Mississippi, Louisiana, and Texas.
List of Orders
Click on the categories below to view additional information.
| Docket No. | Date Issued | Company | Title |
|---|---|---|---|
| ER24-2797-001 | 06/26/25 | Midcontinent Independent System Operator | Order Addressing Arguments Raised on Rehearing |
| 04/17/25 | Midcontinent Independent System Operator, Inc. |
Letter Order Accepting Proposed Tariff Revisions |
|
| ER24-1586-001 | 03/20/25 | Midcontinent Independent System Operator, Inc. | Montana Dakota (waiver request) Rehearing ER24-1586-001 |
| ER22-1640-003 | 01/16/25 | Midcontinent Independent System Operator, Inc. Advisory |
Order On Compliance Filing |
| Docket No. | Date Issued | Company | Title |
|---|---|---|---|
| 07/25/24 | Midcontinent Independent System Operator, Inc |
Order on Compliance Filing |
|
| ER23-2977-000 | 06/27/24 | Midcontinent Independent System Operator, Inc | Order Accepting Tariff Revisions |
| ER24-340-001 | 04/25/24 | Midcontinent Independent System Operator, Inc. | Order Addressing Arguments Raised on Rehearing. |
| ER24-1225-000 | 04/25/24 | California Independent System Operator Corporation. | Order Accepting Tariff Revisions |
| Docket No. | Date Issued | Company | Title |
|---|---|---|---|
| ER22-2363-000 | 06/15/23 | Midcontinent Independent System Operator, 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 |
| ER19-776-002 | 02/16/23 | Midcontinent Independent System Operator, Inc. | Opinion No. 580-A; Order Addressing Arguments Raised On Rehearing |
| ER22-495-002 | 02/16/23 | Midcontinent Independent System Operator, Inc. | Order Addressing Arguments Raised on Rehearing and on Compliance |
| Docket No. | Date Issued | Company | Title |
|---|---|---|---|
| ER22-477-002 | 12/15/22 | Midcontinent Independent System Operator, Inc. | Order Addressing Arguments Raised on Rehearing |
| ER22-477-002 | 12/15/22 | Midcontinent Independent System Operator, Inc. | Order Addressing Arguments Raised on Rehearing |
| EL15-70-003 | 12/15/22 | Public Citizen, Inc. v. Midcontinent Independent System Operator, Inc. | Order Granting Motion |
| EL15-70-003 | 06/16/22 | Public Citizen, Inc. v. Midcontinent Independent System Operator, Inc. | Order on Remand, Establishing Paper Hearing Procedures, and Directing Staff Report and Briefing |
| ER22-461-000 | 01/20/22 | Midcontinent Independent System Operator, Inc. | Order on Waiver Requests and Tariff Revisions |
| Docket No. | Date Issued | Company | Title |
|---|---|---|---|
| ER21-2348-000 | 09/23/21 | Midcontinent Independent System Operator, Inc. | Letter Order Approving Uncontested Settlement |
| ER20-2322-000 | 06/17/21 | Midcontinent Independent System Operator, Inc. Advisory 1 of 1 | Order On Agreements |
| ER20-2352-000 | 06/17/21 | Midcontinent Independent System Operator, Inc. Advisory 1 of 1 | Order Rejecting Agreements |
| ER20-2364-000 | 06/17/21 | Midcontinent Independent System Operator, Inc. Advisory 1 of 1 | Order Conditionally Accepting Agreements Subject to Further Compliance Filing |
| ER21-834-001 | 05/20/21 | Midcontinent Independent System Operator, Inc. | Order Accepting Unexecuted Facilities Service Agreement |
| ER21-836-001 | 05/20/21 | Midcontinent Independent System Operator, Inc. | Order Accepting Unexecuted Facilities Service Agreement |
| ER21-837-001 | 05/20/21 | Midcontinent Independent System Operator, Inc. | Order Accepting Unexecuted Facilities Service Agreement |
| ER20-2436-000, ER20-2437-000, ER20-2437-001 | 04/15/21 | Midcontinent Independent System Operator, Inc. | Order Conditionally Accepting Agreements |
| EL17-89-000 | 04/15/21 | American Electric Power Service Corporation v. Midcontinent Independent System Operator, Inc. and Southwest Power Pool, Inc. | Further Order on Complaints Following Briefing and Technical Conference |
| ER20-1892-000 | 03/18/21 | Midcontinent Independent System Operator, Inc. | Order Granting Waiver Request |
| ER21-679-000 | 03/18/21 | Midcontinent Independent System Operator, Inc. | Order Accepting Tariff Revisions, Subject to Condition |
| ER21-722-000 | 02/18/21 | Midcontinent Independent System Operator, Inc. | Order Accepting Unexecuted Facilities Service Agreement |
| ER21-721-000 | 02/18/21 | Midcontinent Independent System Operator, Inc. | Order Accepting Unexecuted Facilities Service Agreement |
| ER21-720-000 | 02/18/21 | Midcontinent Independent System Operator, Inc | Order Accepting Unexecuted Facilities Service Agreement |
| ER20-598-002 | 02/18/21 | Midcontinent Independent System Operator, Inc. | Letter Order Approving Uncontested Settlement |
2020
| Docket No. | Date Issued | Company | Title |
|---|---|---|---|
| ER21-161-000 | 12/17/20 | Midcontinent Independent System Operator, Inc. | Letter order accepting MidAmerican Energy Company’s 10/20/2020 filing of proposed revisions to its formula rate template under ER21-161-000 |
| ER20-1901-000 | 11/19/20 | Midcontinent Independent System Operator, Inc. | Order Granting Waiver Request |
| EL14-12-015 | 11/19/20 | Association of Businesses Advocating Tariff Equity, et al. v. Midcontinent Independent System Operator, Inc., et al. |
Order Addressing Arguments Raised on Rehearing, And Setting Aside Prior Order, In Part (Opinion No. 569-B) |
| ER18-1611-000 | 10/15/20 | Midcontinent Independent System Operator, Inc. | Order Granting Waiver Request |
| ER20-359-003 | 10/15/20 | Midcontinent Independent System Operator, Inc. | Order Addressing Arguments Raised on Rehearing |
| ER20-938-002 | 10/15/20 | Midcontinent Independent System Operator, Inc. | Order Addressing Arguments Raised on Rehearing and Setting Aside Prior Order, in Part |
| ER20-1078-001 | 10/15/20 | Midcontinent Independent System Operator, Inc. and Ameren Illinois Company | Order Addressing Arguments Raised on Rehearing and Clarification |
| EL15-68-005 | 09/17/20 | Midcontinent Independent System Operator, Inc. | Order on Compliance and Addressing Arguments Raised on Rehearing |
| ER20-276-002 | 09/17/20 | Midcontinent Independent System Operator, Inc. | Order Addressing Arguments Raised on Rehearing |
| ER20-170-002 | 09/17/20 | Midcontinent Independent System Operator, Inc. | Order Addressing Arguments Raised on Rehearing |
| ER19-1823-003 | 09/17/20 | Midcontinent Independent System Operator, Inc. | Order Addressing Arguments Raised on Rehearing |
| ER19-1823-002 | 06/18/20 | Midcontinent Independent System Operator, Inc. | Order on Rehearing and Compliance |
| ER20-1079-000 | 05/21/20 | Midcontinent Independent System Operator, Inc., Ameren Transmission Company of Illinois | Letter Order Accepting Filing |
| ER20-1080-000 | 05/21/20 | Midcontinent Independent System Operator, Inc. | Letter Order Accepting Filing |
| EL16-99-001 | 05/21/20 | Midcontinent Independent System Operator, Inc | Order Granting Rehearing and Dismissing Compliance Filing |
| EL15-70-002 | 03/19/20 | Public Citizen, Inc. v. Midcontinent Independent System Operator, Inc |
Order Denying Rehearing |
| ER20-855-000 | 03/19/20 | Midcontinent Independent System Operator, Inc. | Order Accepting Proposed Depreciation Rates and Establishing Hearing and Settlement Judge Procedures |
| ER11-4081-006 | 03/19/20 | Midcontinent Independent System Operator, Inc. | Order Dismissing Request for Rehearing |
| ER18-462-001 | 03/19/20 | Midcontinent Independent System Operator, Inc. | Order on Compliance |
2019
| Docket No. | Date Issued | Company | Title |
|---|---|---|---|
| EL15-68-003 | 12/19/19 | Midcontinent Independent System Operator, Inc. | Order on Briefing, Compliance, and Rehearing |
| ER19-1823-001 | 12/19/19 | Midcontinent Independent System Operator, Inc. | Order on Compliance Filings |
| ER19-34-003 | 11/21/19 | Midcontinent Independent System Operator, Inc. | Order Denying Rehearing |
| ER19-465-000 and ER19-465-001 |
11/21/19 | Midcontinent Independent System Operator, Inc. | Order on Compliance Filing |
| ER18-136-004 | 10/17/19 | Midcontinent Independent System Operator, Inc. | Order Denying Rehearing |
| ER18-1899-004 | 10/17/19 | Midcontinent Independent System Operator, Inc. | Order Denying Rehearing |
| EL19-60-000 | 09/19/19 | City of Prescott, Arkansas v. Southwestern Electric Power Company and Midcontinent Independent System Operator, Inc. | Order on Complaint, Establishing Hearing and Settlement Judge Procedures, and Establishing Refund Effective Date |
| 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 |
| EL15-70-000 | 07/18/19 | Public Citizen, Inc. v. Midcontinent Independent System Operator, Inc. |
Order Denying Complaints in Part |
| ER17-2323-002 | 06/20/19 | Midcontinent Independent System Operator, Inc. and Ameren Illinois Company | Order on Rehearing |
| ER19-875-000, ER19-875-001 | 06/20/19 | Midcontinent Independent System Operator, Inc. | Order on Proposed Tariff Revisions |
| EL18-138-000 EL18-157-000 EL18-158-000 EL18-159-000 EL18-164-000 EL18-165-000 EL18-167-000 EL19-16-000 |
05/16/19 | Midcontinent Independent System Operator, Inc. | Order Accepting in Part and Rejecting in Part Compliance Filing and Terminating Section 206 Proceeding |
| EL16-108-000 EL17-29-000 EL17-54-000 |
05/16/19 | Tilton Energy LLC, American Municipal Power, Inc., Dynegy Marketing and Trade, LLC and Illinois Power Marketing Company v. Midcontinent Independent System Operator, Inc. |
Order on Complaint, Establishing Hearing and Settlement Judge Procedures, Establishing Refund Effective Date, and Consolidating Proceedings |
| ER18-2397-000 | 03/21/19 | Midcontinent Independent System Operator, Inc. | Order on Compliance filing for Order No. 844 |
2018
| Docket No. | Date Issued | Company | Title |
|---|---|---|---|
| ER18-2340-001 | 12/20/18 | Midcontinent Independent System Operator, Inc. | Order Accepting Generator Interconnection Agreement |
| ER18-2273-000 | 11/15/18 | Midcontinent Independent System Operator, Inc. | Letter Order Granting Tariff Waiver |
| EL14-12-003 | 11/15/18 | Association of Businesses Advocating Tariff Equity v. Midcontinent Independent System Operator, Inc. | Order Directing Briefs |
| ER14-2154-006, ER15-277-005 | 09/20/18 | Midwest Independent Transmission System Operator, Inc. | Order on Initial Decision |
| ER10-1791-004 | 09/20/18 | Midwest Independent Transmission System Operator, Inc. | Order on Rehearing and Clarification |
| EL18-17-000 | 06/21/18 | Midcontinent Independent System Operator, Inc. | Order on Paper Hearing |
| ER18-783-000 | 03/15/18 | MISO Transmission Owners | Order Granting Request for Waiver |
| ER17-156-002 | 02/15/18 | Midcontinent Independent System Operator, Inc. | Order On Compliance Filing |
| ER17-2113-000 | 01/18/18 | Midcontinent Independent System Operator, Inc. | Letter Order Granting a One-time Waiver Request |
2017
| Docket No. | Date Issued | Company | Title |
|---|---|---|---|
| ER17-2097-001 | 12/21/17 | Midcontinent Independent System Operator, Inc. | Order Accepting Tariff Revisions |
| EL16-112-001, ER17-892-000 | 11/16/17 | Coalition of MISO Transmission Customers v Midcontinent Independent System Operator, Inc. |
Order on Compliance Filing and Requests for Rehearing and Clarification |
| ER17-1014-000 | 11/16/17 | Midcontinent Independent System Operator, Inc. | Order on Tariff Filing |
| EL16-12-002, ER16-1817-002 | 10/19/17 | Internal MISO Generation vs Midcontinent Independent System Operator, Inc. | Order on Rehearing |
| ER14-1242-006, ER14-2860-003, ER14-2862-003 | 10/19/17 | Midcontinent Independent System Operator, Inc. | Order on Initial Decision |
| ER16-1817-003 and ER16-1346-002 | 10/19/17 | Midcontinent Independent System Operator, Inc. | Order on Compliance |
| EL16-99-000 and EL17-43-000 | 10/19/17 | Midcontinent Independent System Operator, Inc. | Order On Paper Hearing And Instituting Section 206 Proceeding, Establishing Refund Effective Date, And Consolidating Proceedings |
| ER17-1000-000, -001 and ER17-1013-000, -001 | 10/19/17 | Midcontinent Independent System Operator, Inc. | Order On Tariff Filings And Denying Request For Rehearing And Clarification |
| ER16-471-001 | 10/19/17 | Midcontinent Independent System Operator, Inc. | Order Denying Rehearing |
| EL18-17-000 | 10/19/17 | Midcontinent Independent System Operator, Inc. | Order Instituting Section 206 Proceeding And Commencing Paper Hearing Procedures And Establishing Refund Effective Date |
| ER17-1332-000 | 09/20/17 | Midcontinent Independent System Operator, Inc. | Letter Order Accepting Tariff Revisions |
| ER17-1305-000 | 09/20/17 | Midcontinent Independent System Operator, Inc. | Letter Order Accepting Tariff Revisions |
| ER17-1304-000 | 09/20/17 | Midcontinent Independent System Operator, Inc. | Letter Order Accepting Tariff Revisions |
| ER17-1303-000 | 09/20/17 | Midcontinent Independent System Operator, Inc. | Letter Order Accepting Tariff Revisions |
| ER17-1302-000 | 09/20/17 | Midcontinent Independent System Operator, Inc. | Letter Order Accepting Tariff Revisions |
| ER17-387-001 | 09/20/17 | Midcontinent Independent System Operator, Inc. | Order Rejecting Cost Allocation Proposal |
| EL13-88-001, ER16-1967-000, ER16-1969-000, -001 | 01/19/17 | Northern Indiana Public Service Company v. Midcontinent Independent System Operator, Inc. and PJM Interconnection, L.L.C. PJM Interconnection, L.L.C. Midcontinent Independent System Operator, Inc. |
Order on Rehearing and Compliance |
2016
| Docket No. | Date Issued | Company | Title |
|---|---|---|---|
| ER05-6-124, EL04-135-126, EL02-111-145, EL03-212-140 | 11/17/16 | Midwest Independent Transmission System Operator, Inc. Midwest Independent Transmission System Operator, Inc. PJM Interconnection, LLC Midwest Independent Transmission System Operator, Inc. PJM Interconnection, LLC Ameren Services Company |
Order Approving Uncontested Settlement |
| ER16-2528-000 | 11/17/16 | Midcontinent Independent System Operator, Inc. | Order Accepting Termination of Agreement |
| ER11-1844-001, -002 | 09/22/16 | Midcontinent Independent System Operator, Inc. | Order On Initial Decision And Dismissing Rehearing As Moot |
| ER16-197-002 | 09/22/16 | Midcontinent Independent System Operator, Inc. | Order Granting Clarification |
| ER12-1265-005, -006 | 09/22/16 | Midwest Independent Transmission System Operator, Inc. | Order On Compliance |
| ER12-1266-005, -006 | 09/22/16 | Midwest Independent Transmission System Operator, Inc. | Order On Compliance |
| EL14-34-003, ER14-1724-003, EL15-7-001 et. al | 09/22/16 | Public Service Commission of Wisconsin v. Midcontinent Independent System Operator, Inc. Midcontinent Independent System Operator, Inc. Michigan Public Service Commission v. Mi.,l.idcontinent Independent System Operator, Inc. |
Order On Rehearing And Clarification And Order On Refund Report |
| EL14-12-001 | 07/21/16 | Association of Businesses Advocating Tariff Equity Coalition of MISO Transmission Customers Illinois Industrial Energy Consumers Indiana Industrial Energy Consumers, Inc. Minnesota Large Industrial Group Wisconsin Industrial Energy Group v. Midcontinent Independent System Operator, Inc. ALLETE, Inc. Ameren Illinois Company Ameren Missouri Ameren Transmission Company of Illinois American Transmission Company LLC Cleco Power LLC Duke Energy Business Services, LLC Entergy Arkansas, Inc. Entergy Gulf States Louisiana, LLC Entergy Louisiana, LLC Entergy Mississippi, Inc. Entergy New Orleans, Inc. Entergy Texas, Inc. Indianapolis Power & Light Company International Transmission Company ITC Midwest LLC Michigan Electric Transmission Company, LLC MidAmerican Energy Company Montana-Dakota Utilities Co. Northern Indiana Public Service Company Northern States Power Company-Minnesota Northern States Power Company-Wisconsin Otter Tail Power Company Southern Indiana Gas & Electric Company |
Order On Rehearing and Denying Motion For Partial Summary Disposition |
| EL15-45-001 | 07/21/16 | Arkansas Electric Cooperative Corporation Mississippi Delta Energy Agency Clarksdale Public Utilities Commission Public Service Commission of Yazoo City Hoosier Energy Rural Electric Cooperative, Inc. v. ALLETE, Inc. Ameren Illinois Company Ameren Missouri Ameren Transmission Company of Illinois American Transmission Company LLC Cleco Power LLC Duke Energy Business Services, LLC Entergy Arkansas, Inc. Entergy Gulf States Louisiana, LLC Entergy Louisiana, LLC Entergy Mississippi, Inc. Entergy New Orleans, Inc. Entergy Texas, Inc. Indianapolis Power & Light Company International Transmission Company ITC Midwest LLC Michigan Electric Transmission Company, LLC MidAmerican Energy Company Montana-Dakota Utilities Co. Northern Indiana Public Service Company Northern States Power Company-Minnesota Northern States Power Company-Wisconsin Otter Tail Power Company Southern Indiana Gas & Electric Company Midcontinent Independent System Operator, Inc. |
Order On Rehearing and Instituting Section 206 Proceeding and Commencing Paper Hearing Procedures and Establishing Refund Effective Date |
| ER12-678-006 | 07/21/16 | Midwest Independent Transmission System Operator, Inc. | Letter Order Approving Uncontested Settlement |
| ER12-678-004 and EL14-58-001 | 07/21/16 | Midwest Independent Transmission System Operator, Inc. | Order Granting Rehearing |
| ER12-2302-004 | 06/16/16 | Midcontinent Independent System Operator, Inc. | Order On Compliance |
| EL16-61-000 | 06/16/16 | Midcontinent Independent System Operator, Inc. | Order To Show Cause |
| ER12-715-004 | 05/19/16 | Midwest Independent Transmission System Operator, Inc. | Order Denying Rehearing |
| ER14-2619-004, ER14-2619-000 et al. | 05/19/16 | Illinois Power Marketing Company AmerenEnergy Resources Generating Company v. Midcontinent Independent System Operator, Inc. Midcontinent Independent System Operator, Inc. |
Letter Order Approving Uncontested Settlement |
| EL16-18-000 | 05/19/16 | Conway Corporation | Order Conditionally Accepting Proposed Revenue Requirements and Establishing Hearing and Settlement Judge Procedures |
| EL16-17-000 | 05/19/16 | City of West Memphis, Arkansas | Order Conditionally Accepting Proposed Revenue Requirements and Establishing Hearing and Settlement Judge Procedures |
| EL13-88-000 | 04/21/16 | Northern Indiana Public Service Company v. Midcontinent Independent System Operator, Inc. and PJM Interconnection, L.L.C. |
Order on Complaint and Technical Conference |
| EL07-86-012, EL07-88-012, and EL07-92-012 | 04/21/16 | Ameren Services Company Northern Indiana Public Service Company v. Midwest Independent Transmission System Operator, Inc. Great Lakes Utilities Indiana Municipal Power Agency Missouri Joint Municipal Electric Utility Commission Missouri River Energy Services Prairie Power, Inc. Southern Minnesota Municipal Power Agency Wisconsin Public Power Inc. v. Midwest Independent Transmission System Operator, Inc. Wabash Valley Power Association, Inc. v. Midwest Independent Transmission System Operator, Inc. |
Order Denying Rehearing |
| ER11-2275-002 | 04/21/16 | Midwest Independent Transmission System Operator, Inc. | Order on Rehearing |
| ER09-411-005 | 04/21/16 | Midwest Independent Transmission System Operator, Inc. | Order Denying Rehearing |
| ER11-2275-003 | 04/21/16 | Midwest Independent Transmission System Operator, Inc. | Order on Compliance Filing |
| ER11-2814-001, -002, -004; ER11-2815-001, -002, -003, -004, -006; ER11-3279-001, -002, -003 | 03/17/16 | PJM Interconnection, L.L.C. Midwest Independent Transmission System Operator, Inc. |
Order Denying Rehearing, Granting Clarification In Part, And Accepting Compliance Filings Subject To Condition |
| 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 |
| ER13-2157-004, -005 | 02/18/16 | Midcontinent Independent System Operator, Inc. | Order On Clarification, Rehearing And Compliance Filing |
| 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 |
| ER16-56-000 | 01/21/16 | Midcontinent Independent System Operator, Inc. | Order Accepting Tariff Revisions, Subject To Condition |
2015
| Docket No. | Date Issued | Company | Title |
|---|---|---|---|
| ER12-2302-002 and ER12-2302-003 | 12/17/15 | Midwest Independent Transmission System Operator, Inc. | Order On Rehearing And Compliance |
| ER15-548-001 | 12/17/15 | Midcontinent Independent System Operator, Inc. | Order Denying Request For Clarification And Denying Rehearing |
| ER15-2256-000 and EL14-25-000 | 12/17/15 | Midcontinent Independent System Operator, Inc. | Order On Compliance Filing |
| ER11-4081-002 | 11/20/15 | Midwest Independent Transmission System Operator, Inc. | Order On Compliance |
| ER11-4081-001 | 11/20/15 | Midwest Independent Transmission System Operator, Inc. | Order On Rehearing |
| EL10-86-004 | 11/19/15 | Jeffers South, LLC v. Midwest Independent Transmission System Operator, Inc. |
Order Denying Rehearing And Providing Guidance |
| ER12-678-005 | 10/15/15 | Midwest Independent Transmission System Operator, Inc. | Order Conditionally Accepting Compliance Filing |
| EL13-76-001, ER15-368-001, ER14-2619-001 et al | 10/15/15 | AmerenEnergy Resources Generating Company v. Midcontinent Independent System Operator, Inc. Illinois Power Marketing Company |
Order on Rehearing and Compliance Filings |
| ER15-943-002, ER15-948-001, ER15-943-001, ER15-946-001 | 10/15/15 | Midcontinent Independent System Operator, Inc., Illinois Power Marketing Company | Order Denying Rehearing and Accepting Compliance Filing |
| ER14-2022-001 | 10/15/15 | Midcontinent Independent System Operator, Inc. | Order Granting Waiver |
| EL15-66-000 and EL15-77-000 | 10/15/15 | Southern Company Services, Inc., KCP&L Greater Missouri Operations Company, The Empire District Electric Company, and Associated Electric Cooperative, Inc. v. Midwest Independent Transmission System Operator, Inc. and Morgan Stanley Capital Group, Inc. v. Midcontinent Independent System Operator, Inc. |
Order on Complaints |
| ER14-2952-003, ER14-2952-004, ER14-1243-004, ER14-1725-001, ER14-2180-001 | 09/17/15 | Midcontinent Independent System Operator, Inc. | Order Rejecting and Conditionally Accepting Tariff Revisions |
| ER15-1745-000 | 07/16/15 | Midcontinent Independent System Operator, Inc. | Letter Order Accepting Tariff Revisions |
| OA08-53-005 and ER15-133-000 | 07/16/15 | Midwest Independent Transmission System Operator, Inc. and Midcontinent Independent System Operator, Inc. | Order on Rehearing and Compliance |
| EL14-103-000 and EL14-104-000 | 02/19/15 | Tilden Mining Company L.C. and Empire Iron Mining Partnership v. Midcontinent Independent System Operator, Inc. and Wisconsin Electric Power Company Michigan Public Service Commission v. North American Electric Reliability Corporation and Wisconsin Electric Power Company | Order Dismissing Complaints |
| EL14-34-001, ER14-1242-003 et al. | 02/19/15 | Public Service Commission of Wisconsin v. Midcontinent Independent System Operator, Inc. Midcontinent Independent System Operator, Inc. Michigan Public Service Commission v. Midcontinent Independent System Operator, Inc. | Order on Rehearing, Accepting Compliance Filings, Rejecting Compliance Filings and Requiring Further Compliance, and Dismissing Complaint |
| ER13-2379-002, -003 | 01/22/15 | Midcontinent Independent System Operator, Inc. | Order on Compliance Filing |
| ER13-2379-001, ER13-2376-001 et al. | 01/22/15 | Midcontinent Independent System Operator, Inc., Northern Indiana Public Service Company, and Midwest Independent Transmission System Operator, Inc, et al. | Order on Compliance Filing |
| ER13-2375-002 | 01/22/15 | Midcontinent Independent System Operator, Inc., and Southern Indiana Gas & Electric Company | Order on Compliance Filing |
| ER13-2376-002 | 01/22/15 | Midcontinent Independent System Operator, Inc., and Northern Indiana Public Service Company | Order on Compliance Filing |