OVERVIEW

1 Description of the Works

1.1 Location

Chaffers Marina is one of the completed components of the Lambton Harbour Development Project originally proposed in 1987; the project as a whole was entrusted to a joint venture between the Wellington Harbour Board and Wellington City Council and endorsed by Parliament through the Wellington Harbour Board and Wellington City Council Vesting and Empowering Act 1987.

The current site of Chaffers Marina forms part of the Lambton Harbour port area and consists largely of the water area between Clyde Quay (formally the Overseas Passenger Terminal) and reclaimed land to the west (now occupied by the Museum of New Zealand Te Papa).

The water is deep, extending from 3 metres at the shoreline to 10 – 12 metres on the seaward

extremity and access to the marina is via Herd St, off Oriental Parade.

1.2 Rationale for the Project

The use of the area of Chaffers Marina is governed by a Deed of Licence, issued by Wellington Waterfront Limited (WWL), formally known as Lambton Harbour Management Limited (LMHL), on 24 May 1993.

This Deed of Licence contains a provision (4.24 Deliver up Chaffers Marina on Termination) that the marina must be handed back to WWL, upon expiry of the Deed of Licence in 2058, in ‘good condition’.

This requirement has a significant influence on planning for useful lives of the various marine assets where there are alternatives involving a trade-off between asset replacement cost and useful life.

The current CML licence, as extended in 2008, runs until 30 June 2058 and replacement of assets must be done when their current useful life ends (The useful life of an existing asset and a replacement asset is determined primarily by the type of construction required to suit the purpose of the asset. Useful life is also to a lesser extent determined by the maintenance program adopted for it).

CML has been undertaking an extensive and comprehensive analysis, involving the useful life and replacement cost estimates, for the physical infrastructure assets of CML (breakwater, piles, walkways and pontoons) for some time.

The planned work is not intended to expand the capacity of the marina in terms of the total number of berths however some reconfiguration of berths (i.e. potentially widen some existing berths to provide berths for wider vessels such as catamarans, this would involve reconfiguring 2 existing berths into 1) is planned to allow for future usage.

1.3 Proposed Design

The layout of berths (including the “travel lift”) will remain unchanged.

It is proposed that the replacement of the existing floating piers and finger piers will be done using a proprietary design, such as

the Poralu system (www.poralumarine.fr).

The piers and finger piers are held in position by timber piles, the inspection and asset condition report highlights those piles that can be refurbished and those piles which will need to be replaced.

The fixed timber walkway and existing gangways that provide access to Piers A to E will be upgraded with the final design yet to be confirmed). Alongside the replacement of the fixed timber walkway, the timber wave screen will also be refurbished.