Yes, AFAIK eight DD coaches were allotted to ER along with two EOG's. But, at present, only 5 coaches are at operation and yet the train is not running full. ER is totally wasting the DD rake, they should try it beyond Dhanbad or in other route or can hand it over to other zone. DD can not survive between HWH and DHN, as the distance is short and more than enough trains are running in between these two cities. After all, DHN is not a big city like JP, ADI or LKO which can consume 7- 8 DD coaches themselves.