HDD, Microtunnelling, Pipe jacking, Tunnelling

Trenchless delivers industrial water scheme

In August 2013 UEA’s trenchless division was awarded a design and construction works package for the Hunter Water Corporation as part of the Kooragang Industrial Water Scheme (KIWS).

The KIWS project provides 9 mL per day of high quality recycled water to industrial users in the Kooragang Island area to substitute the use of drinking water during manufacturing.

The scheme was achieved due to the construction of a new advanced water treatment plant and a 7.5 km water delivery pipeline, the majority of works being undertaken using Trenchless Technology.

UEA Trenchless completed works on 2.92 km of fully welded PE pipe from the new treatment plant in the Steel River Estate, Mayfield West, to midway along Cormorant Road, Kooragang Island.

The scope of works consisted of the following:

  • Three horizontal directional drill shots (470 m, 610 m and 460 m), including one beneath the Hunter River
  • One guided bore installation, including steel casing installation
  • A 56 m casing installation for the Hunter River crossing
  • Sliplining of approximately 600 m of existing 500 mm cast iron mains
  • Conventional open-cut works including fittings, final connections, flushing and testing.

The newly installed main was pressure-tested, swabbed and flushed. It passed water sample testing with no issues and was connected to the treatment plant ahead of schedule.

Overall crews, subcontractors, suppliers and Hunter Water worked collaboratively to achieve the KIWS project that will provide ongoing environmental benefits for the Hunter region.

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