Ferrycarrig has been engaged by Downer to compete a treatment plant upgrade at Winmalee Wastewater Treatment Plant as part of a nutrient removal project to lower the level of pollutants discharged by the plant.

Ferrycarrig have been selected to complete Inlet Works including:

• Completion of initial earthworks
• Construction of two stages of piling works comprising a total of 22 piles ranging from approximately 3m to 7m deep
• Installation of underground services including electrical pits and conduits, stormwater pits and drainage, bypass line and reclaimed effluent pipes
• Construction of a concrete retaining wall
• Construction of an Inlet Works Structure with walls to be lined with an HDPE- liner approximately 12m x 15m x 3m high
• Construction of a bin slab and electrical kiosk plinth
• Construction of a DN1800 inlet maintenance hole on top of an existing DN1050 pipe.

Ferrycarrig will also deliver Biosolids Upgrade, Thickening, and Chemical Civil Works including the construction of the following items:

• Completion of earthworks
• Installation of underground services including electrical pits and conduits, stormwater pits and drainage, reclaimed effluent pipe, and sludge pipework
• Construction of a Rotating Drum Thickener Bund
• Construction of a Waste Activated Sludge Pump Bund
• Construction of a Liquid Polymer Bund
  Construction of Citric and Sucrose Bunds
  Construction of drainage sum pits
  Construction of a chemical delivery bund
  Construction of a dewatering structure footings and dewatering mezzanine
  Construct plinths, pavements, steps, kerbs and access ramps
  Installation of bollards

There are several specific challenges to be overcome:

• Working within a live wastewater treatment plant, communication with Downer and Sydney Water Operators is critical to ensure that our works do not impact the normal operation of the treatment plant
• Services proving will be critical to ensure that no service will be damaged as this could potentially impact the normal operation of the treatment plant
• These two packages of works are in Downer’s critical path for the upgrade of the treatment plant, so these works will require accurate planning to ensure there is no delay.