state plan-drw 24 -uwss to koothattukulam-removing silt and mud from the well and providing net to arrest the inflow of floating materials at arakuzha-pipeline work-well cleaning 2 od229016/2024-2025:providing steel weld mesh with 4-6mm dia steel tmt bar having mesh size of 1inch fixed to a 25mmx25mmx5mm l angle outer frame and jointing the frame tovertical post by welding or riveting to arrest the intrusion of waste and floating material to the well including welding, riveting, prime coating, painting etc 3 100.54.4.8:desilting open wells of dia above 6.0m and up to 9.0m and depth up to 15.0m 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.