tender for surveillance and maintenance of ash slurry lines; 1 surveillance of ash slurry pipe lines 2 dechoking of ash slurry lines 3 upkeeping of a slurry lines from ash and vegetation aspects 4 welding of ms pipes at ash pond / green belt including handling 5 gas cutting 6 erection of clamps / supports 7 removal of pipes from location by decoupling 8 transporting ash slurry pipes from one location to other 9 laying of ash slurry pipes & coupling 10 reclaiming of submerged pipes & structures & structural supports and shifting 11 making of foundation / floor/ support 12 removal of spilled ash / waste / scrap/ earth/ stone 13 clearing of ground for rerouting ash slurry pipe lines 14 cutting, shifting and removal of fallen trunk/tree 15 rotation of ash slurry lines