Information on this page is for customers in
{{ town-name }}
Open Access Transmission Information
Information pertaining to FERC Order 890 and 676-E
Eversource owns and maintains electrical transmission facilities (local transmission) available for use to FERC jurisdictional wholesale customers (non-retail).
Eversource also has use rights to the transmission capacity of the Phase I/II HVDC Transmission Facilities, a transmission interconnection that connects the Hydro-Québec TransÉnergie control area to the New England control area. Transmission service is available to eligible customers over these transmission facilities under separate Open Access Transmission Tariffs, as noted below.
An eligible customer interested in obtaining Point-to-Point or Network Service should review the Business Practice document for the applicable service to determine what is required to apply for service.
For more information, visit the North American Energy Standards Board website.
Documents are applicable to all of Eversource’s service area unless otherwise noted.
OASIS
Performance Metrics (PDFs)
Connecticut, Western Massachusetts and New Hampshire
- Transmission Study Metrics Schedule 21
- Transmission Service Request Metrics Schedule 20A
- Transmission Service Request Metrics Schedule 21
Eastern Massachusetts
- Transmission Study Metrics Schedule 21
- Transmission Service Request Metrics Schedule 20A
- Transmission Service Request Metrics Schedule 21
Business Practices, Waivers and Exemptions (PDFs)
Schedule 20A
- Connecticut, Western Massachusetts and New Hampshire Business Practices
- Eastern Massachusetts Business Practices
- Business Practice Amendments
- Planning Redispatch
- Waivers and Exemptions
- Creditworthiness Review Process
Schedule 21
- Connecticut, Western Massachusetts and New Hampshire Business Practices
- Eastern Massachusetts Business Practices
- Business Practice Amendments
- Planning Redispatch
- Waivers and Exemptions
- Creditworthiness Review Process
Available Transfer Capability
ATC Methodology Contact
TransmissionInterconnectionInquiries@eversource.com
Schedule 20A
- Current Available Transfer Capability Implementation Document (ATCID) (PDF)
- Current CBM Implementation Document (CBMID) (Doc)
- Current TRM Implementation Document (TRMID) (PDF)
- Current Load Forecast Descriptive Statement (PDF)
- Postback Methodology (PDF)
- Load Forecast
- Attachment C - Methodology to Assess Available Transfer Capability (PDF)
- Mathematical Algorithms for the Calculation of ATC (PDF)
- Total Transfer Capability (TTC) Data
Schedule 21 (PDFs)
- Connecticut, Western Massachusetts and New Hampshire Current Available Transfer Capability Implementation Document (ATCID)
- Eastern Massachusetts Current Available Transfer Capability Implementation Document (ATCID)
- Connecticut, Western Massachusetts and New Hampshire Current CBM Implementation Document (CBMID)
- Eastern Massachusetts Current CBM Implementation Document (CBMID)
- Connecticut, Western Massachusetts and New Hampshire Current TRM Implementation Document (TRMID)
- Eastern Massachusetts Current TRM Implementation Document (TRMID)
- Postback Methodology
- Connecticut, Western Massachusetts and New Hampshire Mathematical Algorithms for the Calculation of ATC
- Eastern Massachusetts Mathematical Algorithms for the Calculation of ATC
- Connecticut, Western Massachusetts and New Hampshire TTC/ATC/TRM/CBM values for non-PTF Transmission Path
Additional FERC Order 890 Related Items
Schedule 20A
- Capacity Reassignment Application for Firm Service (Doc)
- Conditional Firm Service (PDF)
- Description of Network Resources (PDF)
- Energy and Generation Imbalance (PDF)
- Transmission Studies (PDF)
- Transmission Planning Strawman (PDF)
- Attachment K - FERC Compliance Filing of December 7, 2007 (PDF)
- Attachment K - FERC Compliance Filing of August 13, 2008 (PDF)
- ATC and TTC methodology for HVDC-TF
- Schedule 20A amendment filing 11/6/09 (PDF)
Schedule 21 (PDFs)
- Capacity Reassignment Application for Firm Service (Doc)
- CEII Disclosure
- Conditional Firm Service
- Description of Network Resources
- Energy and Generation Imbalance
- Transmission Planning Strawman
- Attachment K - FERC Compliance Filing of December 7, 2007
- Attachment K - FERC Compliance Filing of August 13, 2008
- Local Transmission Studies List
CEII Contact
TransmissionInterconnectionInquiries@eversource.com
Other Information and Documents (PDFs)
- Participating Transmission Owners Administrative Committee (PTO-AC) Guidelines for Handling CEII Materials and CEII Requests
- Credit and Security Requirements for Generator Interconnections
- Local Transmission System Plan
- Mirant Kendall LLC Substation Agreement
Northern Pass Transmission (PDFs)
Notices
- A 2016 affiliate disclosure notice (PDF)
- B 2017 affiliate disclosure notice (PDF)
- C 2019 affiliate disclosure notice (PDF)
- Notice on phase I/II availability (PDF)
- Posted discount for LTS (PDF)
- Discount for LS Berkshire Wind Power Cooperative Corp (PDF)
- Discount for LS Berkshire Wind Power Cooperative Corp effective 11/13/2019 (PDF)
- Discount for local service VEC notice (PDF)
- Congestion relief offers
- Discretion
- Personnel
- Sch20A ATCID Notice 8-24-12 (PDF)
- Sch20A ATCID Notice 3-31-11 (PDF)
- Transfer Agreement 2015 (PDF)
- Intention to respond to NESCOE RFI (PDF)
- ISO Participant Support
- FERC order no 2003/2006 posting requirements (PDF)
- Transmission ATC and TTC methodology 9PDF)
- Large generator interconnection request
- April 20 2010 Posted Path Notification (PDF)
- November 16, 2010 Waterbury Generation Waiver (PDF)
- Local Transmission service application
- Transmission Tariff