watch on the enemy from its left bank around Chowkham and hence the position of the mound meant for this purpose nearer the river. The fort has been assigned roughly to a period about the 14th-15th century. Geography Sadiya is located at . It has an average elevation of . It is the only area of Assam where the newly described subspecies of hoolock gibbon, which is known as Mishmi Hills hoolock H. h. mishmiensis'' occurs. Politics Sadiya is part of Lakhimpur (Lok Sabha constituency). Name of the assembly constituency is 126-Sadiya LAC. Sadiya is one of the three Sub-Divisions of Tinsukia District. Chapakhowa is the centre of Sadiya. Sadiya is located under Tinsukia district of Assam and a legislative constituency contains 126 members of the legislative assembly. The only town under Sadiya assembly constituency is Chapakhowa town, with 10305 number of total population. According to 2011 census, Schedule Caste (SC) living in Sadiya is 2974 of which 1516 are male and 1458 are female and Schedule Tribe (ST) residing in Sadiya is 25167 of which 12908 are male and 12259 are female. See also Sati Sadhani Notes Cities and towns in Tinsukia district Needham, Francis Jack Tinsukia References Villages in Lower Dibang Valley district Archaeological sites in Arunachal Pradesh