providing of long boom excavator, pontoon mounted excavator along with ejector barrage for removing & disposal of aquatic weeds for conservation of pond no.3 & pond no.2 at ktps, koradi., work of annual maintenance contract for cleaning & de-silting of all peripheral toe drain (nalla) along bund alignment as & when required basis at khasala ash bund of 3x660mw ktps koradi, work of compressive operation and maintenance of dual purpose skimmer harvester for removing & disposal of aquatic weeds