Onshore Wind TurbineNYISO · Lewis Countyplant:plant-56290

Maple Ridge Wind Farm

EDP - Energias de Portugal, S.A. - Lewis County - NYISO

Maple Ridge Wind Farm is a 321.2 MW onshore wind facility on the Tug Hill Plateau in Lewis County, New York, spanning the towns of Lowville, Martinsburg, Harrisburg, and Watson. It consists of 195 Vestas V82-1.65 MW wind turbines. The project is jointly owned by EDP Renewables North America and Avangrid Renewables (each holding approximately 50%) and operates as an independent power producer in the NYISO balancing area. The facility interconnects at 230 kV to the Niagara Mohawk transmission system. Originally developed by PPM Energy and Zilkha Renewable Energy and announced for construction in April 2005, the project was built in phases with Phase I (231 MW, 140 turbines) commencing operations in January 2006 and Phase II (91 MW, 55 turbines) commencing operations in September 2007. Construction created hundreds of jobs and the facility generates approximately 1.2 TWh annually, sufficient to power approximately 138,000 New York homes. The project spans approximately 21,000 acres, with the turbine footprint occupying less than 1% of total acreage, allowing concurrent agricultural and wildlife use on landowner property.

Overview

Key fields

Nameplate capacity
321.2 MW

Canonical EIA plant baseline.

Registry anchor
Plant 56290

plant-56290

Structured profile

Technology
Onshore Wind Turbine
Operator
Horizon Wind Energy LLC

Units and generators

Operating generator records and technology attributes reported through EIA-860.

GeneratorCapacityTechnologyOperationStatus
1137 MW
137 MW summer
Onshore Wind Turbine
Wind · WT
Dec 2005Operating
1A61.1 MW
61.1 MW summer
Onshore Wind Turbine
Wind · WT
Jan 2006Operating
233 MW
33 MW summer
Onshore Wind Turbine
Wind · WT
Jun 2006Operating
390.1 MW
91 MW summer
Onshore Wind Turbine
Wind · WT
Dec 2006Operating

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity
321.2 MW
Onshore Wind Turbine
National rank
#47
of 1,362 operating peers
NY rank
#1
of 32 operating peers

Monthly generation

Download CSV
Latest 12 months
588 GWh
Reported net generation
Latest report
Apr 2026
EIA-923 monthly filing
2025 capacity factor
24.8%
Using current reported nameplate capacity
May 2023: 46.4 GWh2023-05Jun 2023: 23.2 GWhJul 2023: 32.9 GWhAug 2023: 39.2 GWhSep 2023: 18.9 GWhOct 2023: 49.2 GWhNov 2023: 66.4 GWh2023-11Dec 2023: 59.9 GWhJan 2024: 45.9 GWhFeb 2024: 67.3 GWhMar 2024: 73.1 GWhApr 2024: 63.7 GWhMay 2024: 43.7 GWh2024-05Jun 2024: 48.3 GWhJul 2024: 25.4 GWhAug 2024: 37.3 GWhSep 2024: 32.4 GWhOct 2024: 57.2 GWhNov 2024: 68.8 GWh2024-11Dec 2024: 73.4 GWhJan 2025: 83 GWhFeb 2025: 63.4 GWhMar 2025: 101 GWhApr 2025: 71.7 GWhMay 2025: 46.3 GWh2025-05Jun 2025: 53.1 GWhJul 2025: 32.9 GWhAug 2025: 34.7 GWhSep 2025: 28 GWhOct 2025: 39.3 GWhNov 2025: 57.6 GWh2025-11Dec 2025: 87 GWhJan 2026: 70.4 GWhFeb 2026: 42.2 GWhMar 2026: 45.1 GWhApr 2026: 51.4 GWh2026-04

Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.

Grid and market context

Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.

Nearby substations

HIFLD infrastructure inventory
IN SERVICE · 230 kV
4.0 km
IN SERVICE · 115 kV
8.0 km
IN SERVICE · 115 kV
8.0 km
IN SERVICE · 115 kV
8.0 km
IN SERVICE
15.9 km

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Transactions and agreements

Construction Announcement
Apr 5, 2005
PPM Energy and Zilkha Renewable Energy announced the start of construction of the Maple Ridge Wind Farm (formerly called Flat Rock Wind Power Project). Announcement indicated commercial operation expected by end of 2005.
PPM Energy · Zilkha Renewable Energy
avangrid.com
Construction Completion
2005
120 Vestas V82 wind turbines constructed in Phase I project area.
PPM Energy · Zilkha Renewable Energy · Vestas Wind Systems A/S
tethys.pnnl.gov
Construction Phase
May 1, 2006
Remaining 75 turbines in Phase IA and Phase II began construction.
PPM Energy · Zilkha Renewable Energy · Vestas Wind Systems A/S
tethys.pnnl.gov
Project Dedication
Sep 26, 2006
Maple Ridge Wind Farm dedicated in Lowville, New York. Project confirmed as New York's largest wind facility built that year. Phase I: 140 turbines (231 MW); Phase II turbines under construction to bring total to 195 turbines and approximately 320 MW.
PPM Energy · Horizon Wind Energy · New York State officials
avangrid.com
Construction Completion
Dec 2006
Construction of remaining 75 Phase IA and Phase II turbines completed (May–December 2006).
PPM Energy · Horizon Wind Energy · Vestas Wind Systems A/S
tethys.pnnl.gov

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

Drag organizations to explore the network. Select a node to pin its details and available page link.

AssetEquipmentContractor

Parties and identifiers

RelationshipEntityBasis
Equipment supplierVestas Wind Systems A/STurbine manufacturer and supplier
Construction contractorNorthland AssociatesWind-turbine foundation contractor
Grid selectionplant:plant-56290Canonical asset page /nyiso/assets/plant/maple-ridge-wind-farm.

Reporting portfolio

EIA reporting entity
Flat Rock Windpower, LLC
Entity 54684
Operating portfolio
1 plants
1 states
Reported capacity
321.2 MW
Onshore Wind Turbine

Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

  1. Phase I turbine constructiontethys.pnnl...

    120 Vestas V82 wind turbines constructed in Phase I project area.

  2. Maple Ridge construction announcedavangrid.com

    PPM Energy and Zilkha Renewable Energy announced the start of construction of the Maple Ridge Wind Farm (formerly called Flat Rock Wind Power Project). Announcement indicated commercial operation expected by end of 2005.

  3. Generator enters operationEIA-860

    EIA-860 lists generator 1 with this operating date.

  4. Generator enters operationEIA-860

    EIA-860 lists generator 1A with this operating date.

  5. Phase IA and II construction beginstethys.pnnl...

    Remaining 75 turbines in Phase IA and Phase II began construction.

  6. Generator enters operationEIA-860

    EIA-860 lists generator 2 with this operating date.

  7. Maple Ridge Wind Farm dedication ceremonyavangrid.com

    Maple Ridge Wind Farm dedicated in Lowville, New York. Project confirmed as New York's largest wind facility built that year. Phase I: 140 turbines (231 MW); Phase II turbines under construction to bring total to 195 turbines and approximately 320 MW.

  8. Phase IA and II turbine construction completedtethys.pnnl...

    Construction of remaining 75 Phase IA and Phase II turbines completed (May–December 2006).

  9. PPM Energy rebranded to Iberdrola Renewablesavangrid.com

    PPM Energy rebranded as Iberdrola Renewables, Inc. as part of Iberdrola corporate structure consolidation.

  10. Iberdrola USA and UIL Holdings merge to form Avangridavangrid.com

    Iberdrola USA and UIL Holdings Corporation merged to form Avangrid, Inc., consolidating Iberdrola's U.S. renewable energy assets under Avangrid Renewables.

Common questions about Maple Ridge Wind Farm

Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.

How big is Maple Ridge Wind Farm?

Maple Ridge Wind Farm has a reported capacity of 321.2 MW. Source: EIA Form 860M.

What kind of plant is Maple Ridge Wind Farm?

Maple Ridge Wind Farm is a Onshore Wind Turbine facility in Lewis County, NY, participating in the NYISO market.

Where is Maple Ridge Wind Farm located?

Maple Ridge Wind Farm is in Lewis County, NY, inside the NYISO balancing area.

Who operates Maple Ridge Wind Farm?

Maple Ridge Wind Farm is operated by Flat Rock Windpower, LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does Maple Ridge Wind Farm generate?

Maple Ridge Wind Farm reported 588 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

How does Maple Ridge Wind Farm compare to other plants?

By capacity, Maple Ridge Wind Farm ranks #47 of 1,362 operating plants of the same technology nationally. It ranks #1 of 32 in NY.

Asset analyst
plant:plant-56290

Ask about Maple Ridge Wind Farm

Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.