# Altona

NYISO wind_power_plant · https://askthegrid.com/nyiso/assets/plant/altona

Altona is an operating 97.5 MW onshore wind facility in Clinton County, New York, commissioned in April 2009 and associated with EIA plant ID 56901 and NYISO PTID 323606. The facility comprises 65 GE 1.5 SLE-ESS turbines. Originally developed by Noble Environmental Power, it was acquired by Carlyle Group in 2018 through Valcour Wind Energy and subsequently by AES Corporation in December 2021. AES is pursuing a proposed repowering project to increase capacity to approximately 107.5 MW with up to 25 new turbines, expected to commence operation in 2028.

## Key facts

- Technology: Onshore Wind Turbine
- Power capacity: 97.5 MW

## Grid and market context

- ISO/RTO: NYISO
- Balancing authority: NYISO

## Source-backed facts

- Location.town: Town of Altona — documents.dps.ny.gov · confidence: review_required
- Generation.grid voltage kv: 34.5/230 kV — documents.dps.ny.gov · confidence: review_required
- Proposed.repowering.capacity mw: 107.5 MW — documents.dps.ny.gov · confidence: review_required
- Proposed.repowering.unit count: 25 turbines — documents.dps.ny.gov · confidence: review_required
- Proposed.repowering.expected operation date: 2028 — documents.dps.ny.gov · confidence: review_required
- Turbine.hub height m: 80 meters — aes.com · confidence: review_required
- Turbine.rotor diameter m: 77 meters — aes.com · confidence: review_required
- Turbine.blade length feet: 126 feet — aes.com · confidence: review_required
- Turbine.tip height feet: 389 feet — aes.com · confidence: review_required

## Timeline

- 2018-08-31 — Upstream ownership transfer executed
  Upstream ownership transfer from Noble Environmental Power to Zephyr Wind Energy, LLC.
  Source: documents.dps.ny.gov (https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B56CADA99-8630-405C-8EE6-CA097B533B01%7D)

## Sources

- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B007CA699-0000-CF12-9885-4FD24960DC71%7D) — documents.dps.ny.gov · tier authoritative
- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B56CADA99-8630-405C-8EE6-CA097B533B01%7D) — documents.dps.ny.gov · tier authoritative
- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7B702B7195-0000-CD53-B391-95D438A7F8B7%7D) — documents.dps.ny.gov · tier authoritative
- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7BA0916295-0000-C533-9728-DA9F2EA5C352%7D&DocTitle=Altona%20Wind_3-Day%20Notice%20of%20Intent%20to%20File%20Application) — documents.dps.ny.gov · tier authoritative
- [documents.dps.ny.gov](https://documents.dps.ny.gov/public/Common/ViewDoc.aspx?DocRefId=%7BF91FFCD4-3172-4BEC-86B8-7DE2DEDBB354%7D) — documents.dps.ny.gov · tier authoritative
- [aes.com](https://www.aes.com/sites/default/files/2022-05/Altona%20Wind%20Community%20Meeting%20Boards_FINAL.pdf) — aes.com · tier public_source
- [carlyle.com](https://www.carlyle.com/sites/default/files/reports/carlyleccr2019.pdf) — carlyle.com · tier public_source
- [ge.com](https://www.ge.com/news/press-releases/noble-environmental-power-overcomes-market-challenges-receives-long-term-capital-ge) — ge.com · tier public_source
- [prnewswire.com](https://www.prnewswire.com/news-releases/aes-completes-purchase-of-wind-generation-portfolio-from-carlyle-in-the-state-of-new-york-301439649.html) — prnewswire.com · tier public_source

## Data quality

- The disclosed original project financing amounts (>$200 million GE equity + ~$440 million syndicated debt = ~$640 million total) are portfolio-level figures for 330 MW across three windparks. No Altona-specific allocation was disclosed. The 2018 Zephyr-to-Carlyle and 2021 Carlyle-to-AES transactions were portfolio transactions. No Altona-specific acquisition price was disclosed in available sources. No completed turbine decommissioning date or retirement date for Altona's existing facility was identified. Decommissioning is described as a future component of the proposed repowering project. The proposed repowering project (107.5 MW, up to 25 turbines, expected operation 2028) is not yet approved or operational. The existing 97.5 MW facility with 65 turbines remains operating. Operator change: Noble Wind Operations LLC (2013–2019) → Valcour Operating Services, LLC (2020–2024); Valcour assumed operations in 2020 following the Zephyr-to-Carlyle transition.

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