Cyclone Jasper

Ex-Tropical Cyclone Jasper made landfall on December 13, 2023 but it was the associated weather event that followed which had devastating consequences for the Douglas Shire.

3.2 metres of rain was recorded in less than a week and a total of 4.2 metres in the space of two months.

The entire Shire was impacted with major flooding, landslips, overnight evacuations, homes destroyed, water infrastructure, and roads collapsing.

While the immediate priority was preservation of life and delivering essential supplies to remote communities, the region was also facing some new and long-lasting challenges associated with more than 100 landslips.

The landslips hit our community hard on two fronts – roads and water.

Tropical Cyclone Jasper made landfall as a Category 2, delivering the equivalent of two years of rain in just one week. This caused significant damage to Cape Tribulation Road and the Bloomfield Track.

Repair crews were on site 21 December 2023, and due to the extent of the damage, permanent repairs are on going.

Landslips blocked roads and isolated communities including Cape Tribulation and Degarra.

The management of these landslips has been incredibly complex, with tension fractures and wet season conditions causing further instability and the need for intensive monitoring, and unavoidable short notice closures.

On 13 December 2023, TC Jasper made landfall with 3.2 metres of accumulated rainfall recorded in less than a week, causing over 100 landslips across the Shire.  The flooding and landslips caused blockages in the water catchments, breakages along the water pipeline network, and record high levels of turbidity (caused by excessive sediment and debris) in the water.

The high turbidity affected the water treatment process by blocking filtration systems resulting in more frequent backwashing (cleaning) and longer treatment times. Periods of heavy rain following Jasper caused further debris and disruption from the landslips.  With sustained periods of high turbidity, water treatment plants cannot run at normal production rates, and we must change the process of how we treat, store and distribute water to our community.

Water conservation measures are currently in place across Douglas Shire including water restrictions for all homes and businesses that use treated water. Work in the water treatment process and reticulation systems, together with infrastructure upgrades and water conservation efforts of the community, have made a significant impact. With these efforts reservoir levels have been maintained over recent periods of recent heavy rain, and we are seeing greater resilience across our water network.

Work is well progressed to replace the filter membranes in our treatment plants, to install a new pipeline between Mossman and Whyanbeel and to introduce temporary treatment plant at Whyanbeel which will help build resilience across our water network.  Longer term water security measures involving construction of additional intakes and water storage optimisation measures are being worked though with support of State Government.