Previous dredging
Maintenance dredging
From 1996 maintenance dredging of around 100,000 cubic metres has occurred every year, with the disposal of material placed at the East Banks offshore site. The volume of maintenance dredging varies depending on the siltation that has settled in the existing channels and berths.
Capital dredging projects
Date | Location | Depth | Volume | Dredge Type | Disposal Site |
1960-66 | Auckland Point berths, Barney Point berths and harbour channel | Auckland Point: 23ft | A significant volume | ||
1968 | Entrance channel | 10.4m | Further deepening | ||
1980-82 | Approach channels to Clinton and Fisherman's Landing, as well as the Marina | 20 million cubic metres | Trailer / Cutter | Sea / ashore | |
1986-87 | Inner harbour channels widened and berths deepened | Auckland channel widened to 180m and deepened to 15m | 3 million cubic metres | Trailer / Cutter | Ashore |
1987 | Outer channel | 15.8m | 2.5 million cubic metres | Trailer / Cutter | Sea |
1997 | Fisherman's Landing | 1 million cubic metres | |||
1997 | Outer channel | 16.3m | 1 million cubic metres | Trailer | Sea |
1998 | Inner channel swing basin | 2 million cubic metres | |||
1999 | Inner channel | 2 million cubic metres | Trailer / Cutter | Ashore | |
2001-03 | Berth 3 at RG Tanna Coal Terminal and Fisherman's Landing including deepening of Targinie Channel and Clinton Bypass Channel | 2 million cubic metres | Trailer / Cutter | Ashore | |
2005 | RG Tanna Coal Terminal berth 4 | 0.75 million cubic metres | Cutter | Ashore | |
2008-09 | Fisherman's Landing berth pocket and approach | 0.66 million cubic metres | Cutter | Ashore | |
2009-10 | Gladstone Marina | 350,000 cubic metres | Trailer / Cutter | Ashore | |
2010-11 | Early works access to Curtis Island | 375,000 cubic metres | Cutter | Ashore |
