I first found this story – US firm Duke Energy pays out over wind farm eagle deaths – on the UK raptor site: Raptor Politics. If you do a search you will find this story widely reported around the world.
The NPR article – Duke Energy Pleads Guilty Over Eagle Deaths At Wind Farms – has a long list of comments which are entertaining to read.
From the Great Falls Tribune (Montana), this article – Duke Energy pleads guilty to killing eagles at wind farms – which has some data on similar fines paid by oil companies in the past for infractions of the migratory bird treaty.