Spokane Valley firefighters expected to work through the night to clean up a blaze ignited in a pile of rubble at a scrap metal recycling company. The fire was at Dickson Iron and Metal, 907 N. Dyer Road, the same business where authorities said two similar fires ignited last year in piles of metal recycling waste. Friday’s fire destroyed a large excavator, sending thick plumes of black smoke pouring across nearby Interstate 90, reducing visibility and causing traffic slowdowns.