Installations were 1.205GW in third quarter 2011 and 3.37GW through three quarters.

The US had 51.63GW of wind capacity on 30 September. AWEA data shows 8.43GW of capacity under construction in the fourth quarter across 29 states and Puerto Rico. Less than 100MW were new starts in the third quarter, reflecting industry uncertainty over whether Congress will renew the federal production tax credit that expires on 31 December.

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