It also has approved the preparation of a combined rezoning and development application for the existing quarry site at Myocum to be turned into a tip in the future.
Residents also face a substantial hike in charges to help pay for the new extension.
But on the brighter side, the council will absorb extra costs until at least June next year. The director of construction and maintenance services, Andrew Jeavons, said the estimated life of the southern extension was seven years. However, this estimate was challenged by Cr Richard Staples, who said the estimated life was more like five years, or even less. Both Cr Bob Higgins and Cr Ross Tucker warned that people would dump their rubbish in the street if tip charges increased. Cr Tucker said residents could rightly ask how the council got into this situation.