providing and laying of 600mm i/d rcc np3 pipe, construction of manhole chamber along flyover at bajghera railway crossing gurugram. providing, lowering, cutting and jointing of 600mm i/d rcc np3 pipe with hdpe lining through open excavation and trenchless technology and construction of manholes including connection in existing technology and construction of manholes including connection in existing 1800mm i/d master sewer line etc. and all other works contingent thereto. .