Star Drilling undertook this multiple rig program using both conventional geotechnical methods and sonic drilling to investigate the water side of the Hume Weir Earthen Wall.
The project required drilling into waste emplacement areas to a depths ranging from 70 m to 117 m at the Duralie Coal Mine Site NSW. The previous drilling contractor was unable to reach required depths
The drilling specification called for a combination of sonic and air rotary drilling at a diameter of 250mm with the installation of 168mm 316 stainless steel screens.