Plumes of thick black smoke peeled across the Esterley Tibbetts Highway on Sunday morning as firefighters battled a blaze in a scrapyard close to the dump.
A section of the road was closed following reports of the fire, which broke out just before 10 a.m.
Initial fears that the landfill site was alight once again proved unfounded.
The source of the flames was a garbage fire that spread to a pile of scrap metal and used cars on land behind the Ready Mix Concrete plant, close to the bypass between Camana Bay and the AL Thompson store.
Three fire trucks were called to the scene and the blaze was brought under control. Just after 1 p.m. Sunday, firefighters were still on site, using excavating equipment from the landfill site to move piles of scrap metal in an effort to fully extinguish the fire.
The road was closed for an hour between 10.33 a.m. and 11.33 a.m., a police spokesman said.