TWIN FALLS, Idaho (AP) -- Officials with the Twin Falls district of the Bureau of Land Management say Idaho's biggest fire is 75 percent contained, but it has damaged power lines near a wind turbine farm.

They're calling the grass and brush blaze burning on an estimated 26 square miles south of Bliss the "Windmill fire," for its proximity to the turbines.

Fire information officer Kyli Astle said late Friday afternoon that no turbines have been damages by the flames, so far.

Lightning started the fire in southern Idaho at 8 p.m. Thursday.

Firefighters are using 14 engines, three bulldozers, one tractor disc, one helicopter and other equipment against the flames.

Astle said her BLM district is tackling another big fire, too, the active Double A fire burning on 13 square miles southwest of Shoshone.

Copyright 2011 The AP.