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Current and Upcoming CRR Projects

Cleaner Water Starts Here: New Gross Pollutant Traps in Hornsby Shire

Council is installing two new high-performance vortex-style Gross Pollutant Traps (GPTs) to help protect our waterways by capturing pollution before it reaches our creeks and rivers. These smart devices are designed to trap litter, sediment, vegetation, and nutrients—making a big difference to the health of our catchments.

Projects scheduled for Construction in 2024/2025

Bridge Road, Hornsby, Gross Pollutant Trap

A new GPT is being installed along the open channel at Bridge Road, targeting pollution from a 43-hectare urban catchment. Once operational, it will:

  • Capture pollutants larger than 1mm
  • Remove up to 40 tonnes of pollution each year
  • Help reduce the amount of waste entering Berowra Creek, making it a cleaner, more enjoyable place for everyone

Pecan Close, Cherrybrook Gross Pollutant Trap (GPT)

  • A gross pollutant trap (GPT) is planned for construction at Pecan Close to improve the performance of the existing biofilter.
  • The GPT is expected to annually remove around 17 tonnes of pollutants captured from the surrounding 17-hectare catchment area.
  • It will be an underground vortex style GPT.
  • The addition of this GPT will allow the bio-basin to better remove the dissolved pollutants in the stormwater.

Derribong Place, Thornleigh Gross Pollutant Trap

  • A gross pollutant trap (GPT) has been designed for Derribong Place. This device will complement the other gross pollutant traps within Larool Creek catchment.
  • The GPT is expected to annually remove around 100 tonnes of pollutants captured from the surrounding 130-hectare catchment area.
  • It will be an underground vortex style GPT.

Edward Bennett, Cherrybrook, Gross Pollutant Trap

Another GPT is being installed at the end of Pecan Close, Cherrybrook. This device will:

  • Remove up to 20 tonnes of pollution annually
  • Connect to the existing stormwater harvesting system, increasing the amount of water we can reuse for irrigating the sports field
  • Support our goal of smarter, more sustainable water management

Projects Planned for Design in 2024/2025

All designs will be advertised for public consultation.

The Lakes of Cherrybrook

  • The Lakes of Cherrybrook will have 2 GPT’s designed during the 2024/25 financial year, one for each inlet.
  • They will both be underground vortex style GPT’s. Together they are forecast to capture up to 32 tonnes of pollution each year.
  • The goal will be to improve the amenity of the Lakes of Cherrybrook.

Wetland investigations and design

  • Council will undertake investigations and design at 3 wetland locations.
  • The designs will improve the performance of the wetlands for pollution capture, habitat values, urban cooling and amenity.
  • If the investigations are favourable, Council will proceed to detailed design.
  • Possible locations include Lakes of Cherrybrook, Clarinda Wetlands and Walumeda Wetlands.