Case study

Burnett River HDD Crossing

In 2013 Dunstans Construction Group was engaged by the Bundaberg Regional Council to design and construct a 360m, 450mm HDPE sewer pressure main under the Burnett River in Bundaberg, Queensland.

Flooding of the 260m wide Burnett River earlier in the year caused significant scouring of the riverbed, first exposing and then destroying the original sewer pressure main.

The project entailed drilling under the Burnett River and pulling through a new 450mm HDPE pressure sewer main as part of the emergency works after the flooding.

Our team completed the design, engineering and construction of the new pipeline and successfully completed the pipe installation on time using our Herrenknecht HK250 tonne Drill Spread.

The project was the first HDD installation for the Bundaberg Regional Council, and Dunstans undertook all aspects of the project including:
  • Profile design for HDD crossing
  • Engineering calculations for stress on the pipe during pullback
  • HDD under the Burnett River
  • Butt-welding of the HDPE pipeline
  • Buoyancy control of the pipeline during pipe installation
  • Fracture analysis

Dunstans delivered this project on time, budget and with no time lost due to injury. The first to be completed by the Herrenknecht HK250 tonne Drill Spread, this project met all safety and quality standards.

Project quick facts


Bundaberg Regional Council


Installation of 360m of 450mmHDPE sewer pressure main by HDD

Project date

June 2013 – August 2013

Project location


Pipe type

450mm OD HDPE pipe

Crossing length


Project cost