Grange Resources operates Savage River Mine which lies 100km Southwest of Burnie in Tasmania. The magnetite ore body stretches 25km south of the Savage River township ranging in thickness from 40m to 150m. Current production is two million tonnes of premium iron ore pellets; this is expected to rise to nearly three million tonnes as the open cut mine extends underground. HMA Geotechnical was contracted to install vibrating wire piezometers both in the open cut pit and the newly opened underground drive.