Construction of the new Grafton Bridge on August 8, 2017.
Construction of the new Grafton Bridge on August 8, 2017. Caitlan Charles

WATCH: See what's underneath the old Grafton Bridge

ROADS and Maritime have released a new video with an update of the Grafton Bridge project.

Presented by Acting Senior Project Manager Brett Tribe, the update explores where the build is up to right now.

 

Construction of the new Grafton Bridge on August 8, 2017.
Construction of the new Grafton Bridge on August 8, 2017. Caitlan Charles

"At the moment we have two large cranes over in South Grafton, one on the barge and one on land, those tow cranes are working together to build the first two piers in the Clarence River," Mr Tribe explains in the video.

The piles are expected to appear above the surface of the Clarence River very soon. They will be three metres in diameter, 20 metres high and weigh about 400 tonnes.

 

Roads and Maritime have been conducting sonar imaging of the old Grafton Bridge supports.
Roads and Maritime have been conducting sonar imaging of the old Grafton Bridge supports. Roads and Maritime

The video also explores how the original piers for the old Grafton Bridge were built, including sonar images of the bridge underwater.

"That is sound waves that we bounce off hard surfaces to get essentially an underwater picture of the existing bridge piers," he said.



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