Litigation Updates & Reports

Updates Since May 07, 2026

Last update: May 30, 2026 5:21 pm
29
May
FERC Form 714

ISO-NE submits its 2025 FERC Form 714

29
May
Membership

New Member: Ruken Family Office Corporation; Termination: Lighthouse Naugatuck, LLC; Name Change: Veolia Flexible Energy Services North America, LLC (f/k/a Icetec Energy Services, LLC) 

29
May
IMM 2025 Annual Markets Report

IMM files annual report covering calendar year 2025

29
May
ISO-NE FERC Form 3-Q

ISO-NE submits its 2026 Q1 FERC 3-Q

29
May
DER-Related OATT Revisions

FERC accepts Revisions, eff. May 29, 2026

26
May
Membership

FERC accepts (i) the memberships of Boott Hydropower, Charles River Trading, and ENZEE Commodities; and (ii) the termination of the Participant status of Energy Storage Resources

26
May
Base ROE - Refund Obligation Extension

NESCOE supports Extension Respondents* May 8, 2026 request for Clarification and/or Rehearing

 

* Extension Respondents are:  MA AGO, MA DPU, CT AG, CT PURA, MOPA, NH OCA, RI Div, MMWEC, AIM, TEC, Power Options, IECG, and NHEC.

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22
May
2025-26 Transmission Rate Filing (NESCOE Eversource Formal Challenge)

Eversource answers NESCOE’s May 7 answer

21
May
Base ROE - Refund Obligation Extension of Time

NETOs answer Extension Respondents May 8 Request for Clarification and/or Rehearing, opposing the requested reporting requirements.

 

* Extension Respondents are:  MA AGO, MA DPU, CT AG, CT PURA, MOPA, NH OCA, RI Div, MMWEC, AIM, TEC, Power Options, IECG, and NHEC.

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21
May
Base ROE - Opinion 594

FERC issues an Allegheny Notice, noting that the TOs request for reh’g and VTransco’s supplemental request for reh’g of Opinion 594 may be deemed denied by operation of law, but noting that the request will be addressed in a future order

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21
May
New Base ROE (11.39%) - Attachment F Revisions
ER26-2389

In response to the April 30 filing by the TOs of a New Base ROE (11.39%) through Attachment F Revisions, the following parties filed comments, protests, and/or answers:  NEPOOL, Acadia, Consumer Advocates*, MMWEC/NHEC, NECOS, NESCOE, New England Governors, CT Industrial Energy Consumers, MOPA, State Entities**

 

* MA AGO, CT OCC, NH OCA, RI DPUC 
**CT PURA, CT DEEP, CT OCC, CT AG, MA DPU

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18
May
Opinion 594: DC Circuit Appeal

Eversource DC Circuit appeal of Opinion 594

18
May
Base ROE - Status Quo Ante ROE

NETOs appeal to DC Circuit FERC’s denial of reh’g, in Opinion 594, of its Oct 2017 denial of request to reinstate the status quo ante ROE 

15
May
Capital Projects Report - 2026 Q1

NEPOOL files comments supporting 2026 Q1 Report

15
May
CMP Attachment F App. F Wks Changes

FERC accepts CMP Attachment F revisions, eff. Apr 3, 2026

14
May
ISO-NE/NYISO Coordination Agreement Revisions

ISO-NE and NEPOOL jointly file proposed revisions to the ISO-NE/NYISO Coordination Agreement.  The revisions to the ISO-NE/NYISO Coordination Agreement (1) reflect the installation of NYISO owned tie-line meters; (2) update NERC and NPCC references;  and (3) include non-substantive changes to match ISO-NE’s currently-filed version with NYISO’s currently-filed version.

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13
May
Base ROE - Refund Obligation: Request for Stay

FERC denies Request for Stay of ROE refund requirement (refunds, with interest, for the period from Oct 16, 2014 to Mar 19, 2026 (the date of Opinion 594)).  In denying the Request for Stay, the FERC found that “Indicated NETOs have failed to establish that the [FERC]’s order to pay refunds … meets the standard of irreparable harm required to justify a stay.”  The FERC went on to say that, while it “need not reach whether granting a stay may substantially harm other parties or whether a stay is in the public interest, … we also find that neither of those factors would support a different outcome.”  Because the FERC denied the Request for Stay, the refund deadline remains May 20, 2027.

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13
May
Membership Suspension Notice - Interconnect Energy Storage

ISO-NE files notice of May 11, 2026 suspension of Interconnect Energy Storage from the New England Markets

13
May
203 Application: Vistra/Cogentrix (Nautilus Power et al.)

FERC requires ISO-NE IMM to provide Applicants with an unredacted copy of its Market Power Assessment Report pursuant to a  protective agreement (which is to contain additional conditions offered by Applicants to limit the categories of persons permitted to access the complete, non-public version of the Market Power Assessment Report (including excluding competitive duty personnel)).

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12
May
State Consumer Advocates' Eversource X-178 Complaint

State Consumer Advocates* file a complaint alleging that Eversource illegally categorized the X-178 transmission upgrade as an asset management project under section 3.08(f) of the TOA (rather than as a regional transmission project under section 2.06 of the TOA).  If properly categorized as an asset management project, State Consumer Advocates seek either modifications to the TOA or the establishment of a process for FERC review of challenges to a PTO’s classification of a project as an asset condition project under section 3.08(f).

 

* State Consumer Advocates are the ME OPA, CT OCC, RI Division, NH OCA and VT DPS.

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08
May
Capital Projects Report - 2026 Q1

ISO-NE files 2026 Q1 Report

08
May
ISO-NE Tariff Correction Mechanism Show Cause Order

ISO-NE responds to the Show Cause Order, by: (i) explaining potential changes to the Billing Policy that, if adopted, would address
the majority of the issues that the FERC raised in the Show Cause Order, (ii) explaining why it is not appropriate to modify certain, discrete, market settlement provisions that are at issue in this proceeding, and (iii) requesting that the FERC provide guidance with respect to adding a provision to the ISO’s Tariff to enable the extension of settlement deadlines by FERC  action to address settlement errors.

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08
May
Base ROE - Refund Obligation Extension of Time

Extension Respondents* seek clarification or reconsideration of the Apr 14 Extension Notice (regarding a requirement for the submission of reports by NETOs/ISO-NE on the status of their efforts to process the refunds ordered by Opinion 594)

 

* Extension Respondents are:  MA AGO, MA DPU, CT AG, CT PURA, MOPA, NH OCA, RI Div, MMWEC, AIM, TEC, Power Options, IECG, and NHEC.

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07
May
2025-26 Transmission Rate Filing (NESCOE Eversource Formal Challenge)
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