To carry out 4 Yearly maintenance, cleaning and painting of 355.6 MM OD ML & 219.1 MM OD GSPL on Gangia Rail Bridge(PLKM 604.24):355.6 MM OD ML & 219.1 MM OD GSPL on Haruaphuta Rail Bridge (PL KM 628) and 355.6 MM OD ML & 219.1 MM OD GSPL on Sankosh Rail Bridge (PL KM 631.3) including service and checking of all the hangar units under PLM Section, PHQ, Guwahati, Assam.