The sprinkler system helped contain the fire when it started, then San Bernardino County Fire Department firefighters arrived and began using heavy equipment to spread out the trash so the fire would stop, said fire Capt. Jeremy Kerns.
The fire started just after 6 p.m. in the West Valley Transfer Station on the 13000 block of Napa Street and was out within 45 minutes, Kerns said.
The only damage was to the sprinkler system, and no one was injured, he said.
Investigators are still determining the cause of the fire, he said.