Supply of Listed-I, Listed-II and Listed-III WCLs for sand silt cutting and its removal in and around the intake points of two pontoons in river Burhidihing and water treatment plants at Tipling, sinking of shallow tube well at various locations, overhauling of iron removal filters and day to day cleaning and handling services under Field Engineering Department in and around Duliajan, Moran and Manabhum fields.