A large wildfire in Gilliam County is now listed at 12,500 acres, with a ten percent containment level.  An earlier report of 22,000 acres has been revised downward.  The fire started yesterday, and is 20 miles east of Wasco.  The Northwest Interagency Coordination Center reports there are some ranches scattered through the area, but does not list the fire as threatening any structures.  The fire is burning in grass and brush in varied terrain.  The Bureau of Land Management is the lead agency for this fire, with 22 people assigned to it.  The cause of the fire has not been determined, but there was lightning in the Mid-Columbia region Thursday evening.  Crews in the area dealt with a number of smaller fires, particularly in the central portion of Klickitat County.