| | Sustainability and balance |
 | | Last year we completed the second Manapouri tailrace tunnel, a major energy efficiency project that made the Manapouri power station 16% more productive, increasing the station's output by 640 GWh a year, enough to power the equivalent of an additional 64,000 homes. |
 | | Cumulative energy savings for all our offices reached as high as 35% throughout the month of May, falling to 15% through June as the winter power crisis eased. |
 | | This year we have included the diesel used in the boats on Lake Manapouri, which was not included in last year's calculation. |
| annualreport2003.meridianenergy.co.nz /eightkeyreportingareas/sustainabilityandbalance (2844 words) |