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Blowering upgrade

Blowering upgrade

Blowering Dam

  • Blowering spillwayLocated on the Tumut River, 13km upstream of Tumut in southern NSW
  • Dam completed in 1968
  • Storage capacity of 1,628,000 megalitres

About the upgrade

  • Cost of $33 million
  • Funded by The NSW State Government
  • June 2009 start date
  • December 2010 completion date


Stage 1 - Construction of a parapet wall on top of the dam wall crest and raising the spillway training walls. Storage capacity and water releases will not be altered by the upgrade.


  • Improved dam safety in the event of extreme flooding.
  • Improved flood management.
  • Stimulated local economy during the construction phase.


  • 2009 April - Award construction contract
  • 2009 June - Commence construction
  • 2010 December - Complete construction


  • The project was completed on time and within budget in December 2010.
  • A 30 tonne all terrain crane was utilized to facilitated the construction of the parapet wall.
  • Parapet wall construction works at the crest of the dam have also been completed.
  • Concrete works at the spillway complete and the earthfill works have been completed.
  • Site supervision undertaken by Professional Engineering Services (PES).
  • Construction began following sod turning ceremony on the 29 June 2009.
  • Contract for stage one works awarded to Macmahon Contractors Pty Ltd.

Fact sheet


Blowering Dam documentaries and time lapse videos on youtube:


Project Manager: Jay Sinha
Contact Details: 1300 662 077

Inquiry form


Tuesday 24 April
1,895,757 ML
2,581,749 ML
11,967 ML
1,710 ML
-14,270 ML
Tuesday 24 April