All depends on Budget allocation by Ministry of Railway.
The Pink Book for ECR says:
Munger - Rail cum road bridge on river Ganga (14 km)Figures in thousand of Rupees
Deposit A/c :
Latest Anticipated...
more... Cost 452,00,00
Outlay expected to end of 2010-11 79,80,66
Outlay proposed for 2011-12 ..,
Balance to complete work 372,19,34.
Capital A/c: Latest Anticipated 627,63,87*
Outlay expected to end of 2010-11 377,63,87
Outlay proposed for 2011-12 57,00,00
Balance to complete work 193,00,00.
Now judge what time this bridge is going to take into full shape.