SouthCoast Wind 1

ISO-NE-1116BetaActiveOffshore WindISO-NELBNL + Live

1,200 MW generation in MA · In queue since April 2021 · Proposed COD December 2031

BA: ISISO/RTO: ISONENERC: NPCCRC: ISNE

1,200 MW

Capacity

Components

Offshore Wind

5y 3m

In Queue

IA Executed

IA Phase

Signed Mar 2024

Status

Project statusUnder constructionUtility Dive · 2025-10-21

Latest activityproduct_announcementGreentechLead · 2025-01-25

Interconnection

Queue → IA

2y 11m

IA → COD

7y 9m

Total Duration

2y 11m

Construction75%

Queue EntryApr 13, 2021

Interconnection request submitted to ISO/RTO

TCS Study

ISO-NE is transitioning to cluster studies per FERC Order 2023.

Typical: 25–30 months (recent)

Interconnection AgreementMar 26, 2024

Interconnection agreement executed — binding commitment to build

Typical: 30–60 days (negotiation)

ConstructionCurrent

Project under construction

Typical: 36–60 months

Commercial Operation

Proposed COD: 2031-12-31

Cross-source intelligence

Beta

Low confidence·3 sources·as of 2026-06-01

Expected COD

2031

From queue filing

Developer

—

Status

Active

Active — IA Executed (March 2024), but federal permit under threat from Trump administration revocation efforts as of September 2025

Financing

Unannounced

Key milestones

IA executedMar 26, 2024

Interconnection Agreement executed with ISO-NE

source

Permit approvedSep 2025Most recent

BOEM permit subject to Trump administration revocation order

source

Project lifecycle

as of 2025-10-21

PhaseCluster studyUtility Dive · 2025-10-21

Phase history

2024-10ia_pending2025-10Cluster study

OperationalNoUtility Dive · 2025-10-21

Technologyoffshore_wind±GreentechLead · 2025-01-25

DeveloperOW Ocean WindsNantucket Current · 2024-10-29

Permit decisionGrantedNantucket Current · 2024-10-29

About

SouthCoast Wind 1 is a proposed 1200 MW offshore wind generation project located in Massachusetts. The development project is in the ISO-NE interconnection queue as entry ISO-NE-1116, with a queue entry date of April 13, 2021, and a proposed commercial operation date of December 31, 2031. The interconnection agreement for the project has been executed. The point of interconnection is at Brayton Point, making use of QP 837 to connect.

The SouthCoast Wind 1 project has been the subject of recent news coverage, with four articles categorized as regulatory, grid, and industry-related.

Generated from interconnection queue and public data sources

ISO-NE Queue

Development Risk

Realization risk from now to commercial operation — financing close, EPC and tax-equity counterparty mix, and COD probability vs the proposed date. The diligence view that determines whether the deal actually closes. Powered by InfraSure's development-stage modeling stack.

Available on the InfraSure platform

See the full development-risk decomposition for this project.

P(COD by stated date)

Financing close probability

EPC + tax-equity counterparty

Project Details

State

County

—

Grid Region

ISO New England

Market

ISO/RTO Member

Developer

—

Utility

—

Entity

ISO-NE

Service Type

NRIS

Point of Interconnection

Brayton Point making use of QP 837 to connect

Data Source

LBNL + Live

ApplicantSouthCoast WindWBUR · 2025-09-19

CompanyReutersGreentechLead · 2025-01-25

AgencyBureau of Ocean Energy Management±WBUR · 2025-09-19

RulingOrder±WBUR · 2025-09-19

Risk Analytics

Composite operating-phase risk view — what this asset's risk profile will look like once it commissions. Climate hazards across its operating life, expected generation variability, and offtake counterparty exposure, decomposed into a single decision-grade score. Powered by InfraRisk.

Available on the InfraSure platform

See the full risk decomposition + scenarios for this project.

Climate hazards (8+)

Generation variability (P10/P50/P90)

Offtake + transmission counterparty

Generation Forecast

Forward generation outlook — first-year production estimate and 10-year P50 trajectory, with probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.

Available on the InfraSure platform

See the full forecast + scenario decomposition for this project.

10-year P50 forecast

First-year output estimate

Weather + policy scenarios

Financial Forecast

Forward revenue, DSCR projection, and financing-close risk — conditioned on commercial operation. First-year DSCR, 10-year cashflow, and counterparty exposure across price and policy scenarios. Powered by InfraSure's asset cashflow stack.

Available on the InfraSure platform

See the full revenue + DSCR projection for this project.

10-year revenue projection

First-year DSCR

Financing close risk

Market Context

Approximate

ISO / RTO: ISO-NE
Trading Hub: .H.INTERNAL_HUB
Hub Confidence: MEDIUM

This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.

Insights & Articles (4)Beta