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Melbourne Water has completed an upgrade to the Kilsyth Main Drain Retarding Basin, located within the Dorset Recreational Reserve at Croydon. This work ensures the retarding basin continues to reduce the risk of flooding to the community.

Why did we upgrade the Kilsyth Main Drain retarding basin?

Melbourne Water has over 200 retarding basins that we regularly assess for risks, conduct maintenance on, and upgrade as necessary. The Australian National Committee on Large Dams (ANCOLD) guidelines represents the best Australian and international engineering practice in the safe design, management and operation of dams. We use these guidelines to manage our retarding basins.

The Kilsyth Main Drain retarding basin was recently assessed against the ANCOLD guidelines, which found that upgrade works were needed to ensure the retarding basin continues to reduce flood risk and operate safely for the community. 

For more information watch our videos:

Scope of works

The works included:

  • removing trees along the embankment
  • filter trench on the embankment to increase strength
  • crest capping on embankment
  • constructing a concrete cut off wall
  • constructing a drain outlet
  • installing erosion control matting


Last updated:
2 December 2019