The Regional System Plan (RSP) is a comprehensive planning report on system needs and the resource and transmission facilities needed to maintain the reliability of New England’s power system over a 10-year horizon, while also accounting for market efficiencies and economic and environmental considerations. Developing an RSP at least once every three years is one of the ISO’s responsibilities as Regional Transmission Organization (RTO). To learn more, see Attachment K: Regional System Planning Process of the Open Access Transmission Tariff (Section II of the ISO Tariff).
Previous versions can be downloaded using the links below. Additional draft versions and discussion materials are posted on the Planning Advisory Committee webpage.
ISO New England maintains two informational lists related to transmission infrastructure projects: the Regional System Plan (RSP) Project List and the Asset Condition List.
The RSP Project List includes relevant design and cost information for a variety of transmission projects initiated through the regional system planning process overseen by ISO New England.
The Asset Condition List includes cost and other information on upgrades to or replacements of existing transmission facilities identified by facility owners to address asset degradation. While ISO-NE tracks these projects, it does not determine the need for any asset condition project or select transmission solutions to address asset condition needs.
See the RSP Project Lists and Asset Condition List Updates.
Related Information
The ISO develops the RSP in collaboration with the Planning Advisory Committee (PAC), and ongoing data and analyses are posted on the PAC webpage throughout the year as they become available. For your convenience, you can also view system studies and associated materials grouped as follows:
See descriptions of these types of transmission upgrades.
See Competitive Transmission for information and materials associated with the ISO New England’s request for proposals process for finding competitive solutions to identified transmission needs.
Some materials in this section contain CEII. Your browser cannot access them without the ISO’s prior approval. If you are not a market participant and wish to access this material, you will need to complete and submit a CEII Access Request Form in Ask ISO and receive the ISO’s approval. If you are a market participant and wish to access this material, contact your organization’s security administrator (SA) for the ISO’s Customer and Asset Management System (CAMS). Your SA must enter your name into the CAMS database and assign you the necessary roles and permissions. For further information, see the Request CEII Access page.
