tender for survey, maintenance and regular cleaning / de-silting work of 180.00 kmsewer laid under ngrba and maha kumbh programme of internal diameter 150 mm dia to 1600 mm dia including minor repairing of sewer pipe of all diameter, minor repairing of manhole/chamber in harwara , jayantipur , sulem sarai ,mundera ,neem sarai, transport nagar and preetam nagar wards in sewerage district – e of nagar nigam prayagraj by using super sucker and sewer suction cum jetting machine including supply ofall labour, material, safety equipments and t & p required for successful completion of the work as per direction of engineer-in-charge