# Roaring Brook, LLC

NYISO wind_power_plant · https://askthegrid.com/nyiso/assets/plant/roaring-brook-llc

Roaring Brook Wind Farm is a 79.7 MW onshore wind project located in Martinsburg, Lewis County, New York. The facility comprises 20 turbines—five Gamesa G114 units rated at 2.6 MW each and fifteen Siemens Gamesa SG145 units rated at 4.5 MW each—representing the first installation of that SG145 configuration in North America. It is owned by Avangrid Renewables LLC through its subsidiary PPM Roaring Brook, LLC, and is operated by Avangrid Power LLC.

## Key facts

- Technology: Onshore Wind Turbine
- Power capacity: 79.7 MW

## Grid and market context

- ISO/RTO: NYISO
- Balancing authority: NYISO

## Source-backed facts

- Technical.site acres: 4700 acres — dailyenergyinsider.com · confidence: review_required
- Identity.regulators.ferc market rate docket: ER20-2830-000 — federalregister.gov · confidence: review_required
- Operations.market resource ids: PTID 323790; NYISO Gold Book E323790 — nyiso.com · confidence: review_required
- Equipment.rotor diameter meters: 145 meters — siemensgamesa.com · confidence: review_required
- Equipment.blade length meters: 71 meters — siemensgamesa.com · confidence: review_required
- Transactions.transmission line ownership pct: 19.86 percent — documents.dps.ny.gov · confidence: review_required

## Timeline

- 2020-01-21 — Joint Petition for Transmission-Line Ownership Transfer
  Joint petition filed by Flat Rock Windpower LLC, Flat Rock Windpower II LLC, and PPM Roaring Brook, LLC requesting PSC approval to transfer a 19.86% ownership interest in the 230 kV transmission line from Flat Rock entities to Roaring Brook.
  Source: documents.dps.ny.gov (https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B4E709648-589A-4BD5-8568-B208180D0EC2%7D)
- 2020-06-12 — PSC Order Approving Transmission-Line Ownership Transfer
  New York Public Service Commission issued Order Approving Transfers (Cases 20-E-0033 and 03-T-0515), authorizing the transfer of a 19.86% undivided ownership interest in the 230 kV transmission line from Flat Rock entities to PPM Roaring Brook, LLC. This transaction pertained to interconnection infrastructure, not ownership of the wind generating facility itself.
  Source: documents.dps.ny.gov (https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B6023A785-A716-48D8-9FD5-EF00E954E9FF%7D)
- 2022-01-04 — Operational Status Announcement
  Public report announced that Avangrid Renewables' Roaring Brook Wind Farm, comprising 20 turbines across approximately 4,700 acres in Martinsburg, NY, had recently gone into operation and would generate more than 229,000 MWh annually, enough to power over 31,000 homes.
  Source: dailyenergyinsider.com (https://dailyenergyinsider.com/news/33307-avangrid-renewables-roaring-brook-wind-farm-operational-in-ny-state/)

## Sources

- [dailyenergyinsider.com](https://dailyenergyinsider.com/news/33307-avangrid-renewables-roaring-brook-wind-farm-operational-in-ny-state/) — dailyenergyinsider.com · tier public_source
- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B4E709648-589A-4BD5-8568-B208180D0EC2%7D) — documents.dps.ny.gov · tier authoritative
- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B6023A785-A716-48D8-9FD5-EF00E954E9FF%7D) — documents.dps.ny.gov · tier authoritative
- [federalregister.gov](https://www.federalregister.gov/documents/2020/09/14/2020-20167/ppm-roaring-brook-llc-supplemental-notice-that-initial-market-based-rate-filing-includes-request-for) — federalregister.gov · tier authoritative
- [nyiso.com](https://www.nyiso.com/documents/20142/3006151/M-03-TCC-Att%20F-v2022-01-26-Spring-Redline.pdf/d8dc1d59-76b7-d7a7-4774-faf912a08cfe) — nyiso.com · tier authoritative
- [siemensgamesa.com](https://www.siemensgamesa.com/global/en/home/press-releases/190425-siemens-gamesa-news-onshore-order-usa-turbine-sg-4-5-145.html) — siemensgamesa.com · tier public_source
- [thewessongrp.com](https://www.thewessongrp.com/projects/roaring-brook-wind-farm) — thewessongrp.com · tier public_source

## Data quality

- Exact EIA plant identity is well-established: Roaring Brook, LLC, plant ID 61041, with Avangrid Power LLC as the current utility/operator (as of 2024) and Avangrid Renewables LLC as the former operator (2016–2023). The reviewed evidence documents the 20-turbine, 79.7 MW final operating configuration, which differs from an earlier proposed design with 39 turbines. The earlier proposal should not be used as the basis for current asset description. The 2020 PSC-approved transaction pertained to ownership of a 19.86% interest in an associated 230 kV transmission line (for interconnection), not to ownership or sale of the wind generating facility itself. The plant is operated as a single-owner facility classified as an independent power producer (IPP) selling generation into competitive wholesale markets administered by NYISO. Equipment detail is precisely documented: 5 Gamesa G114 units at 2.6 MW each and 15 Siemens Gamesa SG 4.5-145 units at 4.5 MW each, with 352.7-foot hub height and 145-meter rotor diameter.

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Canonical page: https://askthegrid.com/nyiso/assets/plant/roaring-brook-llc

Source: Ask the Grid — https://askthegrid.com/