Since 1978 the town of Bintulu has been administered by the Bintulu Development Authority ( BDA ) , with offices located along Jalan Tanjung Kidurong . The town is located within the boundary of Bintulu District , with a population of 183 @,@ 402 and a total area of 7 @,@ 220 @.@ 40 square kilometres ( 2 @,@ 787 @.@ 81 sq mi ) . Bintulu Division was formerly a Bintulu District under the jurisdiction of Miri Division . The former Bintulu District was upgraded to Bintulu Division on 1 January 1987 . At the same time , Bintulu sub @-@ district was upgraded to the present @-@ day Bintulu District . Both the Bintulu Resident and District offices are located inside Wisma Residen , Pisang Keling Street , Bintulu .