The Workshop Projects Organization (WPO) was established in October, 2002. The task was to set up a modern coach Periodic Overhaul (POH) workshop at Harnaut in Bihar.
The Cast Wheel Plant (CWP), Bela and the Wagon POH Workshop (WRWP), Sonpur were added to WPO’s basket of projects in 2004-05 and 2006-07 respectively.The Diesel Loco Factory Project (DLFP), Marhaura was sanctioned in the Supplementary Budget of 2006-07 and transferred from NER to WPO on 31st January 2007.
The Diesel Loco Factory Project (DLFP), Marhaura has been placed under GM/ ECR and a separate CAO has been deployed with effect from July 2007. The work of setting up of Coach Midlife Rehabilitation Workshop at Anara under Adra Division of SE Railway, having a capacity of 250 coaches per annum was transferred to Workshop Projects, Patna in the month of October 2010. But this work has been transferred to RVNL on 09.04.12. Two more projects namely -Setting up of Wagon POH Workshop (WRW), Badnera/ CR (year of sanction : 2010-11) and Coach Midlife Rehabilitation (MLR) Workshop, Kurnool/ SCR (year of sanction : 2013 - 14) have recently been added by Railway Board on 30th july 2013.