Pursuant to the general laws of the state and the charter of the City, the City Council declares its intention to own, acquire, construct, equip, operate, and maintain, either within or without the corporate limits in whole or in part, sewers, including maintenance, enlargement, or extension of the present sewer system of the City, wastewater treatment, or disposal plant or plants, intercepting sewers, outfall sewers, force mains, pumping stations, or ejector stations, with all appurtenances necessary, useful or convenient for the treatment and disposal of wastewater.