Thailand's Dong Phayayen-Khoyai Forest Complex is in danger of losing its World Heritage status because illegal logging is destroying the forest. The International Union for Conservation of Nature (IUCN) says there is ineffective management to prevent the illegal logging of Siamese rosewood that was once abundant in the area. The IUCN is also concerned about plans to build a hydroelectric dam in the forest although the director of the Cultural and Natural Environmental Management Bureau said that there is a high possibility that the construction of the dam will not go ahead.