I Maintenance And Operation Of Water Supply System In All Colonies, Service Buildings/Office Buildings, Stations Etc. At Dtx, Nbq, Bngn, Mzq, Ayu & Jpz Total 21 Filter Plants/Pump Houses Under The Jurisdiction Of Aden/Nbq For Two Years. Ii Maintenance And Operation Of Water Supply System In All Colonies, Service Buildings/Office Buildings, Stations Etc. At Pnvt, Glpt, Krni, Ddni, Amga, Rgji, Dpra, Boko, Snca, Bmgn, Cgon, Mrza, Aza, Mndp & Nolb Total 26 Filter Plant/24 Pump Houses, Colonies & Service Buildings Of 15 Stations Under The Jurisdiction Of Aden/Glpt For Two Years.