Old tree root of the problem in Morrow Street

Excavation and investigations have been carried out by Council staff on a section of Morrow Street where a sinkhole had formed.

Today's investigation uncovered remnants from an old tree, which is believed to be the cause of the void.

"After excavating the site staff observed a large tree root system and organic matter which we think has been left from a tree that once stood on the site," Supervisor Wearing Operations Lee Shoemark said.

"Over time the roots and remnants of the tree has rotted away, which has led to the subsidence in the road."

The excavation site, between Ivan Jack Drive and Peter Street, measured about 10m x 6m and was about half-a-metre deep.

The site remains closed with detours still in place for motorist.

Council crews will work through the afternoon to backfill the area. The road is expected to be open to traffic later tonight.

A temporary gravel base will remain on the site until after the weekend when an asphalt surface will be reinstated, weather permitting.

Motorists are advised that the road is subject to part closures tomorrow (Friday) for kerb and gutter concreting and one day next week for the asphalting works.