The Golden Rock Railway Workshop at Tiruchi overhauls diesel locomotives and coaches, manufactures steam locomotives and wagons and also exports locomotives. During 2011-12, the workshop released 138 diesel locomotives from periodical overhauling against the target of 79 set by the Railway Board, besides overhauling 15 locomotives of public sector undertakings. It also converted five metre gauge locomotives into broad gauge shunting locos under the rolling stock programme of the Southern Railway, and manufactured 298 wagons in the last financial year, sources said. In recognition of this achievement, the Chief Mechanical Engineer, Southern Railway, Mr S.J. Sood, awarded a shield to the workshop, as part of the Railway Week celebrations on Friday. Mr P. Mahesh, Chief Workshop Manager, received the shield, the sourced added.