tender for cleaning and desiting of opne/ box type storm water drain having avg 600 mm width and avg 600 mm height by mechanical/ manual means with all salety measure including removal of pre cast slab and refixing of the same again after proper cleaning and collecting of the silt directly into the trolley and same will be dispose off from site to out of the city at non disputed area complete in all respect as per the satisfaction of engineer-in-charge , cleaning of chocked storm line by tractor mounted hydraulic jetting machine having 5000 ltr capacity and tractor mounted hydraulic suction machine having 5000 ltr capacity including skilled operator, supervising engineer and 2 no. sewer man etc. for cleaning and desilting of manholes and dechocking of storm lines. dechocking and flushing of storm line from one manhole to another by high pressure jetting system of 2200 psi for storm line from 300 mm dia up to 600mm dia