NYSIO website
The creation of the New York Independent System Operator (NYISO) was authorized by FERC in 1998 and launched on Dec. 1, 1999. The NYISO footprint covers the entire state of New York. NYISO is responsible for operating wholesale power markets that trade electricity, capacity, transmission congestion contracts, and related products, in addition to administering auctions for the sale of capacity. NYISO operates New York’s high-voltage transmission network and performs long-term planning.
List of Orders
Docket No.
Date Issued
Company
Title
ER24-1915-000 04/17/25
New York Independent System Operator
Order on Compliance
Docket No.
Date Issued
Company
Title
ER24-95-000 07/25/24
New York Independent System Operator, Inc. Order On Compliance Filing
Docket No.
Date Issued
Company
Title
EL22-64-000 09/21/2023
New York Independent System Operator, Inc. Order on Show Cause Proceeding
ER21-2460-003 04/20/2023
New York Independent System Operator, Inc.
Order On Compliance Filing
ER22-2350-000 04/20/2023
New York Independent System Operator, Inc. Order on Compliance Filing
EL22-15-001 01/19/2023
New York Independent System Operator, Inc. and New York Power Authority
Order on Compliance
Docket No.
Date Issued
Company
Title
ER21-502-004 12/15/2022
New York Independent System Operator, Inc.
Order on Remand
ER21-2460-002 10/24/2022
New York Independent System Operator
Order Addressing Arguments Raised on Rehearing
EL21-7-000 09/22/2022
Cricket Valley Energy Center, LLC and Empire Generating Company, LLC v. New York Independent System Operator, Inc. Order Denying Complaint
ER21-2460-000 06/17/2022
New York Independent System Operator, Inc.
Order on Compliance Filing
ER20-1718-002 02/17/2022
New York Independent System Operator, Inc.
Order Addressing Arguments Raised on Rehearing Setting Aside Prior Order and Accepting Tariff Revisions
Docket No.
Date Issued
Company
Title
EL21-49-001 11/18/21
Hecate Energy Greene County 3 LLC v. Central Hudson Gas & Electric Corporation and New York Independent System Operator, Inc. Rehearing Order Addressing Arguments Raised on Rehearing
EL21-49-000 07/15/21
Hecate Energy Greene County 3 LLC v. Central Hudson Gas & Electric Corporation and New York Independent System Operator, Inc. Order Denying Complaint
ER20-716-004 06/17/21
New York Independent System Operator, Inc. Settlement 2 of 2
Settlement Letter Order
EL20-65-000 04/15/21
New York Independent System Operator, Inc. Order on Petition for Declaratory Order
EL16-92-004 02/18/21
New York State Public Service Commission, et. al. Order Addressing Arguments Raised on Rehearing, and Setting Aside Prior Order, in Part
2020
Docket No.
Date Issued
Company
Title
EL19-86-001 10/15/20
New York State Public Service Commission and New York State Energy Research and Development Authority
Order Addressing Arguments Raised on Rehearing
ER16-1404-001 07/16/20
New York Independent System Operator, Inc.
Order on Rehearing and Compliance
ER20-922-000 04/16/20
New York Independent System Operator
Order Granting Waiver
ER19-1949-000 02/20/20
New York Independent System Operator, Inc.
Order on Compliance
EL13-62-001 02/20/20
Independent Power Producers of New York, Inc.
Order Granting in Part and Denying in Part Clarification and Rehearing
EL19-86-000 02/20/20
New York State Public Service Commission and New York State Energy Research and Development Authority
Order Denying Complaint
EL16-92-001 02/20/20
New York State Public Service Commission, et. al.
Order Granting in Part and Denying in Part Rehearing and Clarification and Rejecting Compliance Filing as Moot
ER16-1404-000 02/20/20
New York Independent System Operator, Inc.
Order on Compliance
ER19-2276-000 01/23/20
New York Independent System Operator, Inc.
Order Accepting Tariff Revisions and Directing Compliance Filing and Informational Report
EL18-188-000 01/23/20
NRG Curtailment Solutions, Inc. v. New York Independent System Operator, Inc.
Order on Paper Hearing
ER18-1743-002 01/23/20
New York Independent System Operator, Inc.
Order Denying Rehearing
2019
Docket No.
Date Issued
Company
Title
EL18-189-000 12/19/19
Independent Power Producers of New York, Inc.
Order Denying Complaint
EL19-39-001 12/19/19
Light Power & Gas of NY LLC
Order on Rehearing
ER17-905-002 12/19/19
New York Independent System Operator, Inc.
Order Denying Rehearing
EL19-39-000 06/20/19
Light Power & Gas of NY LLC v. New York Independent System Operator, Inc.
Order Denying Complaint
EL19-30-000 05/16/19
LS Power Grid New York, LLC and LS Power Grid New York Corporation I
Order Granting Abandoned Plant Incentive in Part and Rejecting in Part
EL18-33-000 04/18/19
New York Independent System Operator, Inc.
Order on Paper Hearing
ER16-120-007 03/21/19
New York Independent System Operator, Inc.
Order on Compliance
ER17-1561-002 02/21/19
New York Independent System Operator, Inc.
Order Dismissing Request for Waiver as Moot and Accepting Effective Date
ER18-1598-001, EL18-77-000 02/21/19
New York Independent System Operator, Inc.
Order Accepting Revisions to Stated Transmission Rates in Response to the Commission's Order to Show Cause and Terminating Section 206 Proceeding
2018
Docket No.
Date Issued
Company
Title
EL18-188-000 12/20/18
NRG Curtailment Solutions, Inc.
Order on Complaint, Denying Tariff Waiver, and Establishing Paper Hearing
ER15-2059-002, ER13-102-008 02/15/18
New York Independent System Operator, Inc.
Order Granting, in Part, and Denying, in Part, Rehearing, and Clarification, and Requiring Further Compliance
ER17-156-002 02/15/18
New York Independent System Operator, Inc.
Order Conditionally Accepting Tariff Revisions and Requiring Further Compliance
2017
Docket No.
Date Issued
Company
Title
EL18-33-000 12/21/17
New York Independent System Operator, Inc.
Order Instituting Section 206 Proceeding and Paper Hearing
ER16-120-001, ER16-120-003, EL15-37-002 11/16/17
New York Independent System Operator, Inc.
Order on Compliance and Rehearing
ER15-572-000, ER15-572-002, ER15-572-006 11/16/17
New York Transco, LLC
Letter Order Accepting Settlement Agreement
ER17-1310-001 11/16/17
New York Independent System Operator, Inc., New York Public Service Commission
Order Accepting Tariff Revisions
ER16-835-000 01/19/17
New York Independent System Operator, Inc.
Letter Order Approving Settlement
2016
Docket No.
Date Issued
Company
Title
ER17-144-000 11/17/16
New York Independent System Operator, Inc.
Order Granting Waiver
ER16-120-000 and EL15-37-001 04/21/16
New York Independent System Operator, Inc.
Order on Compliance and Rehearing
ER15-572-001, -004 03/17/16
New York Transco, LLC
Letter Order on Partial Settlement and Compliance
EL15-84-001 03/17/16
Caithness Long Island II, LLC
Order Denying Rehearing
ER16-168-000, -001 02/18/16
New York Independent System Operator, Inc.
Order Accepting Proposed Tariff Revisions Subject To Condition
2015
Docket No.
Date Issued
Company
Title
EL14-26-000 11/19/15
New York Independent System Operator, Inc.
Order On Compliance Filing
ER12-1653-005 11/19/15
New York Independent System Operator, Inc.
Order On Compliance Filing
EL12-98-001 and EL12-98-002 11/19/15
Hudson Transmission Partners, LLC
Order On Rehearing, Clarification, And Compliance Filing
ER13-366-004, -005 and ER13-367-002 04/16/2015
Southwest Power Pool, Inc.
Order On Rehearing and Compliance Filing
EL11-50-001 04/16/2015
Astoria Generating Company L.P and TC Ravenswood, LLC
Order On Clarification and Rehearing
EL11-42-001, ER12-2414-000, 001 & 002 04/16/2015
Astoria Generating Company L.P.; et al . Vs. New York Independent System Operator, Inc.
Order On Clarification, Rehearing, And Compliance Filing
EL13-62-000 03/19/2015
Independent Power Producers of New York, Inc.
Order Denying Complaint
EL07-39-006, ER08-695-004, and ER10-2371-000 03/19/2015
New York Independent System Operator, Inc.
Order On Clarification, Rehearing, And Compliance Filing
ER14-543-001 03/19/2015
New York Independent System Operator, Inc.
Order Denying Rehearing
ER14-543-000 03/19/2015
New York Independent System Operator, Inc.
Order Establishing Hearing And Settlement Judge Procedures
ER15-37-000 02/19/15
New York Independent System Operator, Inc.
Order Instituting Section 206 Proceeding and Directing Filing to Establish Reliability Must Run Tariff Provisions
