Koolan Island Seawall Remediation, Western Australia
Client: Mount Gibson Iron Ore Pty Ltd
Koolan Island is located one kilometer off the Kimberly coast of northern Western Australia in the Buccaneer Archipelago of Yampi Sound and approximately 250 kilometers northeast of the regional centre of Broome.
Mount Gibson Iron mined high grade ore on the island until the seawall failure in 2014 flooded the main pit and resulted in the closure of large-scale mining operations with the subsequent loss of 300 jobs having a major impact to the local community. In April 2017, after two years of technical and financial evaluation, Mount Gibson approved re-construction of the seawall in order to resume production in the first quarter of 2019.
The works incorporated;
The project aimed to reconstruct the seawall of Main Pit in order to resume large scale iron ore production.
Geomotion was contracted for the supply, installation, maintenance and support of the geotechnical instrumentation that was installed in the seawall rock fill embankment constructed at Koolan Island.
The scope consisted of two phases of work spanning fourteen months. Instrumentation supplied, installed, and monitored by Geomotion consist of:
All instruments have been connected to wireless dataloggers which transmit data to a hosting platform for remote interpretation.