KITTITAS COUNTY, Wash --- Wildfire 15 miles east of Ellensburg covers over 100 acres.

On July 1 around 1:30 p.m. Kittitas County fire crews responded to the Westbound Ryegrass I-90 rest area for a semi-truck fire.

I90 Ryegrass Fire Update-

Fire personnel are reporting the grass fire that spread to 200 acres is now 100% contained.

Fire personnel will remain on scene patrolling and mopping up the fire for the next 24 hours.

Westbound traffic is open and reduced to one lane west from milepost 128. DOT estimates a second lane will be opened up later in the evening but the right lane will continue to remain closed to traffic for fire operations.

There is still smoke blowing over the roadway limiting visibility and fire personnel working in the area request that motorists reduce speed as they drive through.

The fire has spread to the north of the rest area into the wind farm and is covering 192 acres, said the Washington State Department of Natural Resources. Fire crews are fighting the fire and westbound I-90 from Vantage is closed until further notice, according to the Kittitas County Sheriff’s Office.

The fire was reportedly started by a hay truck that caught fire.

The WSDNR said there are three helicopters, two fire bosses, four fire engines and a bulldozer at the Ryegrass fire.