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Endomines Finland Plc (NASDAQ: PAMPALO) is testing a new approach to mine waste management at its Pampalo gold mine, with the launch of a pilot project evaluating dry stack tailings under Finnish operating conditions.
The initiative follows the approval of a permit to construct a pilot-scale dry stack tailings area at the Pampalo site. The project is designed to assess how the technology performs across Finland’s seasonal weather conditions while examining potential environmental and operational benefits.
Dry stacking involves filtering and dewatering tailings before deposition, allowing process water to be recovered and reused. Compared with conventional tailings storage facilities, the method has the potential to improve water efficiency, reduce environmental impacts and support progressive site rehabilitation.
The pilot will also help Endomines evaluate whether dry stacking could be incorporated into future expansions at Pampalo and the company’s Southern Gold Line development project.
Kari Vyhtinen, CEO of Endomines, commented, “We continuously seek new solutions to make our mining operations more sustainable. We are proud to be at the forefront of this development in Finland – Our understanding is that while dry stacking is widely used around the world, no mining company in Finland has yet implemented the method on a full production scale. The pilot facility will provide valuable information on how the solution performs in northern conditions.”
The pilot programme is expected to run for approximately two years, allowing Endomines to monitor performance across multiple seasons. Areas of study will include water management, seepage performance, structural stability and rehabilitation techniques.
Hanne Mäkelä, Chief Sustainability Officer at Endomines, commented, “The dry stack tailings pilot is closely aligned with the key objectives of Endomines’ sustainability programme, including improving water efficiency, reducing seepage water volumes, enhancing dam safety, and enabling progressive site rehabilitation during operations. The concrete research data generated through the pilot will provide valuable confidence for the permitting of future expansions, not only for us but also for other mining companies in Finland.”
The results will be shared with regulators and used to assess whether dry stacking could become part of Endomines’ future production-scale operations.
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