tender for cleaning of drains in city area - sludge clearance of drains, channels and canals with lift 1.5 mtr and lead up to 50 mtr. 2 carriage of materials by mechanical transport including loading, unloading and stacking :: earth 5km 3 dismantling stone slab flooring laid in cement mortar including stacking of serviceable material and disposal of unserviceable material within 50 metres lead. (if required) 4 providing and fixing stone slab covering of required size over drains including filling of joints with cement sand mortar 1:3 complete as per direction of engineer-in-charge.average thickness 40 to 50 mm (18.17 % of 402.5=73.13) excluding metairial only for labour charge