Tender For zonal maintenance for arresting seepage on track bed, treatment of expansion/ construction joints of rts box/ elevated structures/ stations/ ventilation shaft, box walls, floors, mezzanine & ceilings by grouting with cement admixed with non- shrinkable water proofing compound and with cementicious grout on both up & dn track including pit lines and ballastless track from km (-)6.37 (dakshineswar) to km 7/14 (central) including noapara car depot of metro railway, kolkata.