Re-excavation of Betna river from km 15.000 to km 23.500 equal to 8500 meter in connection with Drainage Improvement of Polder No. 1,2, 6-8 & 6-8 (Extension) in Sathkhira District under Sathkhira O&M Division-2, BWBD, Sathkhira. (Package No: W-Sat-2/20, ID: 572728)