A NSW Government website

Sustainable Diversion Limit Adjustment Mechanism


The Murray Darling Basin Plan was developed to improve and maintain healthy rivers and floodplains, while supporting sustainable agriculture, industries and communities. The Sustainable Diversion Limit Adjustment Mechanism (SDLAM) is a program designed to achieve similar or improved environmental outcomes for rivers, wetlands and wildlife using less water as part of the Murray Darling Basin Plan. SDLAM can be achieved through supply (improvements to the way rivers are managed), constraints or efficiency measures (changes to water use practices).

The NSW Government brought forward $330 million worth of five SDLAM projects through the SDLAM Acceleration Program. The projects have many benefits for native fish including:

  • improved fish passage that will allow greater connectivity to habitat and breeding areas
  • promoting fish growth and dispersal
  • improved water quality
  • increased habitat through reinstated wetting and drying of creeks, wetlands and floodplains
  • improved supply of floodplain carbon to river food webs.

The five projects include:

More information on the SDLAM program can be found at DPIE Water's website.


The Yanco Creek Modernisation Project is one of the accelerated projects within the SDLAM program. Billabong Creek re-regulation weirs is a sub project in the Yanco Creek Modernisation Project that will allow water flows to better meet irrigation and environmental water requirements. The Hartwood Weir (in the above video) is one structure proposed to be upgraded and will also include a vertical slot fishway.