According to fire officials, the fire broke out at Earth City Supply Yard By-Product in the 13600 block of Missouri Bottom Rd., around midnight. KTVI reports workers were out early Friday morning spraying water on the fire. The business accepts yard waste from the public for conversion into compost and mulch.
Workers at Earth City Supply told KSDK it was a surface fire and the smoke coming from the pile was due to the abundance of grass clippings and wood pallets. As that burned away, the fire began to choke itself out.
Hazelwood, Orchard Point and Pattonville fire departments responded to the scene to help the Robertson Fire District, according to KMOV.
The cause of the fire has not been determined.