Replacement of existing ups with battery of passengers boarding bridges at bay no.19 to 25,35l, 35r and 36 in t1 and t4 at chennai airport including all inclusive comprehensive maintenance contract aicmc

Maintenance contract for controlling leakage and seepage in underground/elevated section including tunnel, stations, ancillary buildings, viaduct and depot etc. of line-8 from botanical garden to krishna park extension and line-8 extension stations.