Secretary of the Interior Ken Salazar approved the Cape Wind renewable energy project on federal submerged lands in Nantucket Sound, but will require the developer of the $1 billion wind farm to agree to additional binding measures to minimize the potential adverse impacts of construction and operation of the facility.
|Project site map. Click to enlarge.|
The Cape Wind project would be the first wind farm on the US Outer Continental Shelf, generating enough power to meet 75% of the electricity demand for Cape Cod, Martha’s Vineyard and Nantucket Island combined. The project would create several hundred construction jobs and be one of the largest greenhouse gas reduction initiatives in the nation, cutting carbon dioxide emissions from conventional power plants by 700,000 tons annually.
Because of concerns expressed during the consultations, Interior has required the developer to change the design and configuration of the wind turbine farm to diminish the visual effects of the project and to conduct additional seabed surveys to ensure that any submerged archaeological resources are protected prior to bottom disturbing activities.
Under these revisions, the number of turbines has been reduced from 170 to 130, eliminating turbines to reduce the visual impacts from the Kennedy Compound National Historic Landmark; reconfiguring the array to move it farther away from Nantucket Island; and reducing its breadth to mitigate visibility from the Nantucket Historic District. Regarding possible seabed cultural and historic resources, a Chance Finds Clause in the lease requires the developer to halt operations and notify Interior of any unanticipated archaeological find.
The Cape Wind Associates, LLC facility would occupy a 25-square-mile section of Nantucket Sound and generate a maximum electric output of 468 megawatts with an average anticipated output of 182 megawatts. At average expected production, Cape Wind could produce enough energy to power more than 200,000 homes in Massachusetts.
Horseshoe Shoals lies outside shipping channels, ferry routes and flight paths but is adjacent to power-consuming coastal communities. One-fifth of the offshore wind energy potential of the East Coast is located off the New England coast and Nantucket Sound receives strong, steady Atlantic winds year round. The project includes a 66.5-mile buried submarine transmission cable system, an electric service platform and two 115-kilovolt lines connecting to the mainland power grid.