Rectification Work for improving water quality in Thulasippara SLEC water supply scheme Under Package-1 of Nedumkandam GramaPanchayath in Idukki District

Desilting open wells of dia above 6.0m and up to 9.0m and depth up to 7.5m by earth work excavation in or under water, after closing the inlet valves and plugging any holes in the steining by engaging divers with breathing accessories, bailing out water using pump set of suitable capacity, lifting the excavated silt/mud/clay using ropes, pulleys and buckets and disposing the same within minimum lead of 50 m from the periphery of the well, including engaging coolies for scrapping the inner side of the well, without causing any damages to the existing structures and installations, including hire and conveyance of tools and plant and as per the directions of the department officers etc. complete.

Supplying, sieving, stacking and spreading 20mm to 12.5mm broken stone in the gallery trenches as per standard norms including cost of all materials.

Supplying, sieving, stacking and spreading 10mm to 6mm broken stone in the gallery trenches as per standard norms including cost of all materials.

Supplying, sieving, stacking and spreading Coarse sand (zone III) in the gallery trenches as per standard norms including cost of all materials.

Washing OHSR/GLSR using brooms, brushes and bleaching powder by engaging coolies, scrubbing twice, washing and cleaning using fresh water, including side wall, floor slab and columns, disposing the the slurry / waste materials away from the immediate premises and within the initial lead of 50m from the periphery of the tank, without causing any damage to the existing structure and installations, charges including the operation of valves, conveyance and hire charges of tools and as per the direction of the department officers etc. complete.