lowering lifting of defective tube / wells for maintaining of water supply under ac-28.-lowering & lifting of sub/sets from bore by taking out double flanged gi pipes, submersible p/set, cable, cutting of rusted nuts and bolts etc and replacement of damaged d/f gi pipes, cable, defective pump set etc as per site requirement and lowering of sub p/set, sub cable, gi pipe etc as required, jointing of cable from sub p/set along with holding of cable with pipes and jointing of d/f pipes etc with nuts bolts and rubber packing etc. the job includes hiring of all t&p, tripod stand, chain pulley block and other material handling equipments, safety gadgets and required and consumable material (rubber packing and nuts bolts) will be arranged by the firm as per site requirement. the other material required during execution will be provided by department. approved rate the depth (upto depth of 250 feet)