 Namdapha was originally declared a Wildlife Sanctuary in 1972, then a National Park in 1983 and became a Tiger Reserve under the Project Tiger scheme in the same year.Its name was combination of two Singpho words "nam" means water and "dapha" means origin (river which originates from Dapha Bum glaciers.The national park is located in Changlang district of the northeastern state of Arunachal Pradesh, near the international border with Myanmar.