It’s feared damage to the environment near a manganese mine on the island may have been caused by the dewatering of mining pits that were flooded by Cyclone Megan in March. It’s feared damage to the environment near a manganese mine on the island may have been caused by the dewatering of mining pits that were flooded by Cyclone Megan in March. Mining Environmental Issues, Mining and Metals Industry, Environmental Impact Latest business news