GALWAY, IRELAND--November 6, 2012 --Written by Martin Lynch, European News Editor for Industrial Info (Galway, Ireland) Onshore windfarm costs have plummeted over the last four years to make it more competitive with traditional, fossil-fuel-powered electricity generation. A comprehensive study, the Wind Operations and Maintenance Price Index, carried out by Bloomberg New Energy Finance (BNEF) found that the average price for full-service operations and maintenance (O&M) offerings for onshore wind farms fell from €30,900 ($39,500) per megawatt (MW) in 2008 to €19,200 ($24,600) per MW annually in 2012.