See bro
first of all..
The departure time isnt that great from Dhanbad.....
I seriously doubt people availing at this point of time from Dhanbad
second of all, the time slot B/W BWN-HWH is when...
more... numerous other trains towards HWH stops at BWN,
A person from BWN surely has more than enough connections between these two stations.
Plus, if you run via Main, the traffic b/w BWN-BDC is still moderate and can easily occupy this train and go on for a reversal any day....
Plus BDC's connectivity is superb....
You have the connectivity to Naihati and Halisahar on the other sides of the bank and going by your TT
The train leaves BWN at 6.28 can easily arrive at BDC at 7.25 and do the reversal and leave towards Katwa there onwards.