The preferred option for improving the harbour entrance is to build a parallel groyne system and to dredge the harbour entrance. Consent to start the work has been granted and the District Council is now in the process of developing the business case and seeking funding.
Preliminary options came after a two-stage feasibility report, prepared by Dahm and Kench, which looked at improving access at the mouth of the Ōpōtiki Harbour. The first stage of this report was delivered in 2002, the second in 2004.
The preferred option was decided following a final report of the project's modeling and preliminary design by DHI. The groyne structure Preliminary Design Report suggests three potential construction methods - Geotextile Core, Rubble Mound and Concrete Sheet Piles.
Illustrations and details of the three design concepts are contained in the Update newsletter - June 2008.
Further design investigations also have been made with the use of steel sheet piles to construct the groynes.
The final choice as to the form of construction will be made at the time the construction contract is awarded. By this process further innovative forms, construction methods and value-for-money considerations will be thoroughly assessed.
Duffill Watts has prepared a report to formally confirm the navigation requirements including channel depth for the design of the harbour entrance. This report forms part of the Modelling Report (Volume 2) and can be downloaded from this website from the Technical Data page.
Preferred Option | Options | Assessment of Effects
