Landslides and risk mitigation

Although landslides may not be a primary concern for many Australians, they can have significant impacts on infrastructure and communities. These natural phenomena can disrupt homes, roads, railways and bridges, causing considerable damage.

What is often overlooked is that many landslides leading to injuries or fatalities are not purely natural events. Many landslides that resulted in injuries or fatalities were actually triggered by human activities. Between 2000 and 2011, over half of the landslides resulting in harm were linked to human actions.

During this period, around 370 buildings were damaged or destroyed by 83 landslides and/or mine subsidence events. This includes everything from minor debris flow damage to more severe impacts. The cost of these incidents, when adjusted to 2010 dollars, is estimated to be around $82 million. Landslides also have a major impact on our infrastructure, affecting about 300 roads, railways, and bridges during the same timeframe.

Navigating the Aftermath: The McCrae Landslide of January 2025 

On January 14, 2025, the serene community of McCrae on Victoria's Mornington Peninsula was shaken by a significant landslide. This natural disaster not only disrupted the lives of residents but also highlighted the importance of preparedness and community resilience. 

The Event 

The landslide occurred early in the morning, causing a house to slide down a hill and collide with two other homes. Fortunately, there were no fatalities, but one person was injured and taken to the hospital in stable condition. The event led to the evacuation of multiple properties and the establishment of an exclusion zone to ensure safety. 

Immediate Response 

Emergency services, including the SES Sorrento unit, were quick to respond, working tirelessly to secure the area and assist affected residents. The Mornington Peninsula Shire Council has been actively involved in managing the situation, conducting site investigations, and providing support to the displaced families. 

Moving Forward 

As the community works towards recovery, it is crucial to focus on rebuilding and reinforcing infrastructure to prevent future incidents. Geotechnical engineers are conducting thorough investigations to understand the cause of the landslide and develop strategies to mitigate similar risks. 

Lessons from the Past: Thredbo Landslide of 1997 

The McCrae landslide brings to mind the catastrophic Thredbo landslide of 1997 in New South Wales.  

On July 30, 1997, a massive landslide struck the Thredbo Alpine Village, destroying two ski lodges and claiming 18 lives. The disaster was caused by a combination of heavy rain, melting snow, and a leaking water main, which led to the liquefaction of the soil. The Thredbo landslide highlighted the critical need for proper soil stabilisation and disaster preparedness.  

This tragic event underscored the importance of robust emergency response systems and has since influenced disaster management practices across Australia. 

Leveraging Data  

In the wake of such natural disasters, making informed, data-driven decisions is crucial. Whether you're a property developer, environmental consultant, or homeowner, assessing potential impacts on human health, the environment, and financial risks relating to your property is essential.

Our team uncovers comprehensive environmental and climate data to unlocks fast, simple, and reliable analysis of the risks associated with any land or property in Australia.  

By leveraging Land Insight’s their expertise, you can make strategic decisions regarding property ownership and ensure thorough environmental due diligence.

References

Leiba, 2011. Impact of landslides in Australia to December 2011. knowledge.aidr.org.au/resources/ajem-jan-2013-impact-of-landslides-in-australia-to-december-2011/

ABC News, 2025. Landslide on Victoria's Mornington Peninsula sends house 'tumbling', other homes evacuated - ABC News

Australian Institute for Disaster Resilience, 1997. Thredbo landslide, 1997 | Australian Disasters