Mars Hill Wind Farm Project — Plant Summary
- EIA Plant ID
- 56448
- Capacity
- 42 MW
- Primary Fuel
- Wind
- Technology
- Onshore Wind Turbine
- Status
- Operating
- Location
- Aroostook, ME
- Operating Since
- 2007
- Generators
- 1
- Operator
- Evergreen Wind, LLC
- Parent Company
- —
- Annual Generation
- 118,868 MWh
- Capacity Factor
- 32.3%
- Balancing Authority
- New Brunswick System Operator
- ISO/RTO
- —
- NERC Region
- NPCC
Mars Hill Wind Farm Project
OperatingWind
Ranked #12 of 22 Wind plants in ME#979 of 1442 nationally
42 MW Wind operating in Aroostook, ME — New Brunswick System Operator
EIAGEMWD
42 MW
Nameplate Capacity
1
Generators
unit
Onshore Wind Turbine
Technology
2007
Operating Since
Location
Coordinates
46.5416, -67.8116
County
Aroostook, ME
Nearby Plants
- Mars HillSolar2.6 MW · 6.1 km
- ME - Novel (Lighthouse Ph I) Mars HillSolar2.5 MW · 8.4 km
- Easton CSG 1 LLCSolar3.3 MW · 13.5 km
Ownership & Operator
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Evergreen Wind, LLC | TerraForm Power Operating LLC [100%] | — |
| Owner(s) | Evergreen Wind, LLC | TerraForm Power Operating LLC [100%] | — |
| Status | Operating | operating | — |
Ownership Chain
GEM identifies the owner as TerraForm Power Operating LLC [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
The Mars Hill Wind Farm Project is a 42 MW wind power facility located in Aroostook County, Maine. The plant began operating in 2007 and is owned and operated by Evergreen Wind, LLC. It utilizes a single onshore wind turbine generator. The facility is connected to the New Brunswick System Operator balancing authority within the Northeast Power Coordinating Council (NPCC) NERC region.
The wind farm's latest annual generation was 118,868 MWh, achieving a capacity factor of 32.3%. The plant's wind turbine has a hub height of 80 meters and a rotor diameter of 77 meters. The turbine was manufactured by GE Wind and is model GE1.5-77. Mars Hill Wind Farm Project is ranked as the 12th largest wind farm in Maine out of 22, and 967th nationally out of 1424.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
NPCC
Balancing Authority
New Brunswick System Operator
Grid Voltage
69 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
12.3K MWh
Latest Month
118.9K MWh
Annual Generation
32.3%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (10)Beta
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About a quarter of the electricity generated in Maine comes from hydropower, and most of that is produced by Brookfield Renewable.
The Maine Monitor·1 years ago
Industry·other
What you need to know about new wind and transmission line proposals for Northern Maine
Mars Hill Wind, south of Presque Isle, is one of only a handful of large renewable energy projects in Northern Maine, where the cost of exporting power is high.
Mars Hill Wind (developer)
The Maine Monitor·3 years ago
General
Northern Maine transmission line gets key vote from state regulators
State regulators gave initial approval Wednesday to new transmission line that would connect a massive renewable energy project in Aroostook County to New...
Maine Public·3 years ago
Last updated 2026-03-26
View all 10 articles