THE PROJECT

Busselton Water provides up to 7.5 GL/annum of high-quality drinking water to the City of Busselton and surrounding areas.  The supplies are primarily obtained from production bores constructed within the Yarragadee Aquifer.

One of the main bores, BWB 17, was drilled to 600 m depth and constructed with a carbon-steel pump chamber and intermediate casing, which gradually suffered from pitting corrosion. The bore was design by Rockwater to allow for sufficient annular clearance for it to be relined.

In 2015, after 30 years of operation, BWB 17 was relined by inserting thin-walled stainless-steel casing and cementing it in place with a one-shot grouting packer.  The bore has continued to supply about 1 GL/annum, with an instantaneous flow rate of 95 L/s.

Rockwater has been providing hydrogeological services to Busselton Water since 1980.

Since 1980, we have completed over 15 major projects for Busselton Water, similar to BWB 17.

• Preparation tender specifications
• Evaluation of tenders
• Field investigation reporting
• Annual compliance reporting

• Down-hole CCTV surveys, pre- and post-relining
• Caliper survey for identification of obstructions and cement volume calculation
• Casing collapse strength calculation 
• Design and supervision of relining 
• Supervision of bore development
• Optical Televiewer and Acoustic Televiewer surveys
• Supervision of pumping-tests for bore efficiency calculation