Unauthorised structures on the bank of Dhaleswari River in Narayanganj being bulldozed by BIWTA authorities on Monday. New Nation Published: 12:00 AM, 07 June 2016 Updated: 2:46 PM, 24 September 2022 Unauthorised structures on the bank of Dhaleswari River in Narayanganj being bulldozed by BIWTA authorities on Monday.