Crossover Wind, a 135-megawatt wind farm near Wynne, is now online. The farm's 33 Vestas 4.5MW turbines, designed to produce enough electricity to power 50,000 houses, have been operating since June.

The Danish company behind Revolution Wind, a $6 billion project off Rhode Island, said the federal government had unlawfully halted work on the wind farm. By Brad Plumer and Karen Zraick Orsted, the ...