Lake Binney

The Project: Major earthworks project to remove the downstream buttress and replace the existing dam filters, raise the clay core and reconstruct the Brady's Lake Road.

Location: Lake Binney, Tasmania

Client: Hydro Tasmania

Contract Value: $5.3m

Construction Period: November 2011 - May 2012

Project Manager: Brendan Moore

Project Foreman: Tim Walter

Scope of Works:

  • Construct temporary roads to be used during construction
  • Prepare stockpile sites
  • Removal of 65,000m3 of the existing rockfill and transition layer on the downstream face. Supply and install a two layer filter (Zone 2A & Zone 2B) on the dam core and foundation.
  • Supply and install rockfill Zone 3A, place rockfill Zone 3B to the design profile as the weighting material.
  • Raise the existing clay core.
  • Operate existing quarries in the local area to supply 2B, 3A and rockfill.
  • Reinstatement of the dam crest road, installation of guardrail along downstream face.
  • Site re-instatement.

Key Issues:

  • Working in a remote location
  • Re-design to accommodate inaccurate as-constructed information
  • Management of Quarries and Quarry supplies
  • Working on an operational dam
  • Fatigue management

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