silt clearance and bed scrapping silt clearance in internal section from km 0.000 to km 14.000,km 15.000 to km 16.500 and bed scraping from km 14.000 to km 15.000 and km 16.500 to km 22.540 of gauribazar dy. - silt clearance/trench digging including lift upto 1.5m and lead upto 30m, including dressing,cost of driver/assistant driver, pol, maintencance of machine, contractor profit, taxes etc but excluding leveling,& compaction by hydraulic excavator, equivalent capacity 60 cum/hr as per direction of engineer-in-charge. 3 bed and berm scraping of channel including desilting & its proper disposal upto 5 cumecs carriying discharge