biennial maintenance contract for ash dyke and its surrounding area at ntpc gadarwara => limited-part b - non schedule items re-laying and pitching of existing stone providing and laying stone boulders 300m providing and laying crushed stone filte providing and laying coarse sand filter laying cross drainage pipe for draining- deployment of portable dg set of capaci providing and installation of diesel ope providing and installing in position por providing and installing in position the providing and packing bricks laid flat ( lettering including ntpc logo, maps and supplying and filling of empty hdpe ceme cleaning of filter drains along rock toe disposal of dead animals from ash dyke a disposal of dead animals from ash dyke a barricading safety tape red and white wi lettering with radium sticker of approve supply ,stacking and spreading of earth deployment of dumper of (minimum capacit deployment of tractor-trolley with opera supply of hydraulic excavator & loader( deployment of tanker with water tanker supplying and stacking of good earth at providing breaker/chipping machine(hilti brick work with common fly ash bricks brick work with common fly ash bricks supplying of sand and filling in empty c slope protection with turf sods including total station survey/dgps survey, collection deployment of ssw for round the clock deployment of usw with tools and plants deployment of sw with tools and plants etc