Execution of work of Howrah- Kharagpur Section: ( i ) Replacement of old damaged Ballast retainers at 9 No. Bridges and ( ii ) Provision of heavy duty RDSO type Ht Gauge at LC no. 4, 3, 5, 19, 21, 24, 25 & Road under Bridge No. 81 under the jurisdiction of Sr. DEN/ East/ KGP.