McRobies gross pollutant trap

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We are installing a large gross pollutant trap just below the McRobies Gully Tip. The trap will help prevent pollution from entering the Hobart Rivulet.

Encased in concrete, the trap will be buried in an eight metre hole on City-owned land. It will help stop litter, sediment and even free-floating oil and grease from entering and polluting the rivulet.

Installation of the trap is the result of strong public interest in protecting the platypus from dangerous litter. This includes hair ties and string that can injure or even kill platypus.

Work began in June 2025 with the digging of the hole that will house the trap.

The gross pollutant trap will be lowered in sections and assembled within the eight metre hole. Installation is scheduled for July 2025.

There may be local traffic delays on the day the trap is installed.

This $600 000 project is fully funded by the City of Hobart.

What is a gross pollutant trap?

A gross pollutant trap is a stormwater management device that captures large amounts of debris, litter, sediment and pollutants before they enter local waterways such as rivers, streams, rivulets and beaches. This helps reduce water pollution and improves the health of aquatic environments.

How will this project benefit the community?

By capturing large pollutants and debris, the gross pollutant trap will help:

  • improve water quality in the Hobart Rivulet by intercepting pollutants from the McRobies Gully stormwater system. This unit will increase the storage volume for pollutants from approximately one cubic metre available in the existing "sock" to 9.5 m3 of litter storage capacity and 2000L of oil storage capacity.
  • reduce the amount of litter and plastic waste in the environment.
  • protect wildlife and aquatic ecosystems.
  • enhance the visual appeal of public spaces and water bodies.
  • protect our native platypus population from entanglement in litter.

How will this project improve stormwater quality?

The trap captures large pollutants, such as litter, leaves, sediments and other pollutants. It captures them before they enter the stormwater system and flow into natural waterways. This improves the quality of the water entering rivers, streams, and oceans, and helps protect sensitive local ecosystems.

What are the long-term benefits?

The trap helps improve long-term water quality, reduce pollution in public spaces, and contribute to the overall health of local ecosystems. It's a sustainable investment in Hobart's environmental health and future.

Will there be any disruptions during the installation?

The trap will be delivered from Launceston and there may be localised traffic delays when it is installed.

The trap is being installed on City-owned land, so there should be no disruptions to residents.

What happens after the installation is complete?

The gross pollutant trap will require ongoing maintenance. This is to remove accumulated pollutants and ensure it continues to function effectively. We will handle regular inspections and cleaning as part of our stormwater management program.

Location

McRobies Road, South Hobart 7004  View Map

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