Upgrading Ladysmith’s wastewater treatment plant

The steep slopes posed significant design and construction challenges but operation of the existing plant was maintained throughout construction.

The project team selected an MBBR/DAF process as the most viable option to satisfy the financial, physical, regulatory and operational issues.

The existing plant is located on a 1.4ha site on the foreshore and discharges into Ladysmith Harbour. The site is constrained by the existing plant, steep slopes and other encumbrances. Of the 1.4ha site, only 0.1ha is available for the new plant.

The headworks building was constructed on the north slope of the site, and is anchored to the site using 42 soil anchors drilled into the glacial till. 

The new headworks comprises:

  • New screens
  • Grit removal
  • Flow measurement
  • Pump station (sized for ultimate build-out of the community)
  • Odour control

The steep slopes posed significant design and construction challenges and operation of the existing plant was maintained throughout construction. The new headworks building entered service in July 2010.