Manapouri project costs 1963-71 NZ$ Original tailrace tunnel 41M Powerhouse and access tunnel(including installation of four machines) 47M Equipment (purchase of four machines) 7M Transmission line (four circuits) 18.5M Machines 5-7 (purchase and installation) 12M Engineering 8M 1997-2002 Second tailrace tunnel 200M November 1999-August 2001 Upgrade of transformers 10.3M 1999-2007 Refurbishment of generators and mechanical equipment (includes exciters, generators, turbine and wicked gates 90M