Crews are preparing to tackle “challenges” as a bridge renewal project shifts into a new phase.
The $9.2m Doonella Bridge upgrade, which is set to futureproof the link between Noosaville and Tewantin, is progressing on schedule.
The retaining walls have been completed, allowing backfilling of the excavated road to start, and further key works are underway.
Meanwhile, commuters are showing “patience” with the single lane alternating traffic arrangement.
Acting major projects and transport manager Kyrone Dodd provided an update.
“Additional nightwork over the past six weeks has helped progress the project as it moves into the complex stage of relocating the sewer rising main and reconstructing the Telstra pit,” he said via a media release.
“This next phase presents some challenges, but we’re hopeful it will progress smoothly.
“The contractor and our project team have been very productive and it’s pleasing to see the project continue to move forward.”
The electrochemical chloride extraction process was due to be commissioned in early to mid-September to remove chloride ions (rust-causing salt) from the contaminated reinforced concrete.
The rehabilitation technique uses a temporary electrical current to draw out the rust-causing salt from the concrete, helping to extend the lifespan of the bridge structure by returning the steel reinforcement to a non-corroding condition.
Meanwhile, the 20 pile encasements have been installed beneath the bridge.
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The bridge, which required upgrading after 58 years of wear and tear, carries about 20,000 vehicles per day.
Single-lane, alternating traffic was introduced in July, after the council’s initial plan to divert westbound traffic prompted widespread community backlash.
“The patience and courtesy shown by drivers has helped keep traffic moving,” Mr Dodd told Sunshine Coast News.
“The arrangement continues to be under traffic signals. The signals arrangement remains in place for the duration of the work.”
The project web page stated that the upgrade could be completed by early December but Mr Dodd said it was hard to say with any certainty when it could be finished.
“The project is heading into the complex period with the relocation of the Telstra pit and sewer rising main. The weather has helped progress the work and completion dates are still difficult to confirm, as it is weather dependent.”
Marine access will be unavailable beneath the bridge for the duration of construction.
This upgrade is funded by the federal government’s Safer Local Roads and Infrastructure Program, in partnership with Noosa Council.
