OceanaGold (Philippines), Inc. has improved how it monitors the tailings storage facility at its Didipio Mine, using new technology to track changes in the structure, especially during the rainy season when heavy rainfall can increase risks.
Completed in January 2026 in partnership with global engineering firm GHD, the upgrade brings information from ground sensors and satellite monitoring into one dashboard that engineers can access remotely in real time.
The system uses instruments to measure water levels inside the tailings dam and sensors that detect ground movement. When readings reach set warning levels, the system automatically sends email alerts, helping engineers identify potential problems and respond sooner.
The technology also makes it easier for the company to collect information and prepare monthly monitoring reports for the Department of Environment and Natural Resources.
“Historically, rainfall at Didipio begins to intensify in August and peaks in November,” said Atty. Joan Adaci-Cattiling, OceanaGold Philippines’ president and general manager for external affairs and social performance. She said the upgraded system gives the company a clearer picture of the facility’s condition during the southwest monsoon, locally known as habagat.
GHD’s Jonathan Dickson said combining engineering standards with real-time information helps engineers monitor the facility remotely and make better-informed decisions.
Adaci-Cattiling emphasized that technology does not replace engineers’ expertise. Instead, it gives them more reliable information to spot changes earlier and manage risks more effectively.
Barangay Didipio Councilor Nestor Gayamo welcomed the improvement, saying the use of advanced monitoring technology gives residents added assurance that potential risks are being watched closely.
The mine’s tailings storage facility is built using the downstream method, in which each new section of the dam is supported by solid rock rather than previously deposited mine waste. Its design follows criteria set by the Australian National Committee on Large Dams.
While the upgrade improves monitoring, safety still depends on engineers responding promptly to warning signs and taking appropriate action.
