The curse of one of Australia’s biggest and busiest bridges: Site of infamous disaster and child murder is now ‘sinking’
- Melbourne’s West Gate Bridge takes 200,000 vehicles over the Yarra River daily
- The bridge’s eastern section is reportedly experiencing ‘downward movement’
- Coode Island silt beneath the bridge has reportedly compressed over time
- A transport spokesman said the affected section will be repaired over Christmas
- He said the bridge is still safe but some lanes may close during maintenance
A bridge that carries more than 200,000 vehicles a day is reportedly ‘sinking’ in silt and needs urgent repairs to stop it slipping further.
The eastern section of the West Gate Bridge in Melbourne, which crosses the Yarra River and links the CBD to the western suburbs, is experiencing ‘downward movement’ due to being built on Coode Island silt, according to The Herald Sun.
Coode Island silt is a soft clay-like soil that has allegedly compressed over time under the pressure of the 42-year-old bridge.
The Victorian Department of Transport will repair the bridge by raising the affected section’s concrete slabs and beams from late 2020 to early 2021.
Despite the movement, Government authorities say the bridge is safe for drivers but some lanes may have to close during maintenance.
The eastern section of the West Gate Bridge (pictured) in Melbourne, which crosses the Yarra River and links the CBD to the western suburbs, is sinking due to being built on Coode Island silt, according to The Herald Sun
Tender documents obtained by The Herald Sun reveal that the repairs were recommended in a recent assessment of the bridge.
‘The eastern approach slab of the WGB is sitting on Coode Island silt and is setting, therefore it needs to be jacked up,’ the documents read.
‘The location of works is in Port Melbourne where the WGB meets the roadway.’
It is reported that the works will cost $1 million, which Nick Foa, the head of transport services at the Department of Transport, said is ‘not far from the mark’.
Mr Foa said the bridge is ‘not moving’ but said there is some ‘differential movement’.
Vehicles travelling over the West Gate Bridge. A Department of Transport spokesman could not confirm if the maintenance would affect traffic but lanes of the bridge have been closed due to maintenance in the past
‘The bridge itself is not moving but the bridge is absolutely monitored 24/7. We’ve got teams of people dedicated to making sure that bridge is safe,’ Mr Foa told 3AW.
‘This is on the approach to the bridge, not the bridge itself.
‘On the lead up to the bridge on the eastern side, that’s an area known for silt, there’s a bit of differential movement on the approach to the bridge.
‘We just need to make sure that it’s a smooth ride for motorists and to make sure the approach lines up to the bridge perfectly.
‘It’s part of ongoing maintenance. We do maintenance on the bridge every year around the Christmas period where there’s less traffic. So we’ve advertised the tender to do some works on the eastern approach.’
A 112-metre section of the West Gate Bridge (pictured) collapsed during construction (pictured) on October 15, 1970, which killed 35 construction workers and injured 18 others
The West Gate Bridge collapse is Australia’s worst-ever industrial accident, with a subsequent Royal Commission finding the collapse was caused by a structural failure
A Department of Transport spokesman said: ‘The West Gate Bridge is not sinking and there are no safety concerns or any changes to the operation of the Bridge.’
The spokesman could not confirm if the maintenance would affect traffic but lanes of the bridge have been closed due to maintenance in the past.
Two surface cracks appeared on several lanes of the bridge due to extreme heat in 2014.
Prior to this, the Victorian Government had spent $347 million strengthening the bridge between 2009 and 2011.
A 112-metre section of the West Gate Bridge collapsed during construction on October 15, 1970, which killed 35 construction workers and injured 18 others.
It is Australia’s worst-ever industrial accident, with a subsequent Royal Commission finding the collapse was caused by a structural failure.
Six twisted fragments of the collapsed bridge are in located Monash University’s engineering faculty to remind engineers of the fatal consequences of their errors.
Construction on the West Gate Bridge began in 1968 before it was opened in 1978