bids are invited for repair to inter connection of water supply main between bgtc old under ge barrackpore, excavation in trenches in soft loose soil not exceeding , excavation in trenches in hard dense soil not exceeding , returning filling in trenches with excavated oil including spreading, levelling watering and well ramming , removing surplus rocks soil to a distance not exceeding 50 meter away and depositing where directed , material and labour for laying pipe line max dia 80 mm for inter connection of bgtc new old and map bore wel , boring holes 0.6m deep under road for passing underground pipes and getting out and disposal of spoil to a distance of exc 50m horizontally under road , new construction of valve pit chamber with brick masonry with sub class b bricks in cement mortar , fixing of sluice value and nrv of 80mm dia in existing pipe line system note valve will be supplied by dept free total quantity : 201