tender for survey, maintenance and regular cleaning/de-silting of internal diameter 200 mm dia to 450 mm dia trunk and branch sewer laid under interception and diversion of karelabagh drain , karelabagh drain a-1 , karelabagh drain a -2 in karelabagh of nagar nigam prayagraj, by using super sucker and sewer suction cum jetting machine including minor repairing of sewer pipe of all diameter, raising of manhole chamber to road level ,replacement of damaged manhole cover with new cover, minor repairing of manhole/chamber and supply of all labour,material, safety equipments and t&p required for successful completion of the work as per direction of engineer-in-charge.