Milestone reached for new sewerage tunnel
Reading Time: 2 minutes The Central Interceptor, a 14.7km sewerage tunnel being dug under Auckland, has passed a significant local milestone. The Tunnel Boring Machine (TBM) is now close to 7km into its journey, having crossed under the Manukau Harbour and 110 metres below Hillsborough. The boring machine, Hiwa-i-te-Rangi, has already passed beyond the Onehunga area. The interceptor is ...