Widening of Valley side at km 20.900, km 35.500 and km 36.700 and culvert at 13 locations viz. km 17.600, km 17.800, km 18.300, km 20.200, km 21.500, km 21.650, km 21.850, km 32.800, km 33.100, km 38.300, km 40.300, km 43.700, km 47.300 on NH-10 on EPC mode in the State of West Bengal