survey, maintenance andregular cleaning / de-silting work of sewerof internal diameter 150 mm dia to 1200 mm dia including minor repairing of sewer pipe of all diameter, minor repairing of manhole/chamber in colnelganj , allenganj, medical college, george town, tagore town , mumfordganj , new katra , daraganj , buxi khurd , alopibagh and madhwapur wards along withregular cleaning/desiltingand maintenanceof interceptor sewerof dia. 150 mm to 1200 mm from hanuman mandirto daraganj sps and interceptor sewer of dia. 150 mm to 1200 mm from nagvasuki mandir to daraganj sps(including prabhu ghat drain interceptor sewer) on dashashwamedh ghat roadin sewerage district – d 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.