The primary purpose of constructing the Farakka barrage is to ________

The primary purpose of constructing the Farakka barrage is to preserve and maintain navigation. The Farakka Barrage Project, constructed in 1975 with the prime objective of preservation of Kolkata Port and for increasing the navigation depth of the Bhagirathi – Hooghly waterway, has a 2225 m long barrage across Ganga with a canal head regulator to divert 40,000 cusec of water through a feeder canal for inland navigation to maintain Kolkata Port.