Mars Hill underwent an $85 million wind power project in the fall of 2006.
 First Wind installed 28 General Electric 1.5 megawatt turbines along the top and northern sections of the mountain.
With a capacity factor of 35%, the wind 
farm generates about 130 million kilowatt hours (kW·h) per year (15 MW·yr/yr).

The wind turbines are assembled in multiple parts.
The towers, which are composed of three support sections stacked one on top of another with a combined weight of 20,000 pounds, are 262 ft (80 m) tall.
The three blades (together, a rotor) attached to the hub of the turbine each span approximately 115 ft (37.5 m), for a rotor diameter of approximately 250 feet — comparable to the wingspan of a Boeing 747 jet-liner.
Mars Hill underwent an $85 million wind power project in the fall of 2006.  First Wind installed 28 General Electric 1.5 megawatt turbines along the top and northern sections of the mountain. With a capacity factor of 35%, the wind 
farm generates about 130 million kilowatt hours (kW·h) per year (15 MW·yr/yr). 
The wind turbines are assembled in multiple parts. The towers, which are composed of three support sections stacked one on top of another with a combined weight of 20,000 pounds, are 262 ft (80 m) tall. The three blades (together, a rotor) attached to the hub of the turbine each span approximately 115 ft (37.5 m), for a rotor diameter of approximately 250 feet — comparable to the wingspan of a Boeing 747 jet-liner.
Mars Hill (Maine)