IntroductionPT Newmont Minahasa Raya (NMR) is a joint venture company between Newmont Gold Company (USA), which owns 80% of the shares, and PT Tanjung Serapung (Indonesia) which holds 20%. PT NMR is located in the southeast of Minahasa, about 80 km south of Manado, the capital of North Sulawesi. PTNMR had operated an open-pit mine since 1996 and ceased operations in 2001 after the reclamation of the deposit. They started producing gold in 1996 and started disposing of all the waste through pipes into Buyat Bay. In 2004, the Newmont Minahasa Raya gold mine began shutting down its operations in North Sulawesi, leaving the local communities of Buyat Bay and Ratatotok with long-lasting environmental damage. , economic decline and a huge amount of health problems. Environmental Issue Since the beginning of project development in early 1993, NMR has sought to convince local public communities that their standard practices and operations would be environmentally saved and has been practically and widely carried out around the world of mining. Environmental Impact Assessment (EIA) was conducted by NMR to support their future project, but the effectiveness was questionable. Meanwhile, the design phase and during the implementation of the project was conducted differently than the EIA. The dumping of waste, what worried the local communities aroused after the NRM operation. As commonly practiced in gold mining operations, the hazardous materials remaining after the process of separating the valuable from the worthless fraction of a mineral should have been disposed of under the sea, beneath the thermocline layer. But in reality, in the case of Newmont, as many as 2000 tons per day of tailings were piped by the NMR to the bottom of Buyat Bay in 82 meters, a sufficient distance, as claimed by many scientists. Coastal tailings dumping is a serious ecological concern because coastal waters are biologically the richest parts of the oceans and because many open ocean species depend on coastal habitat for part of their life cycle..