Griffiths Civil Build Projects

West Wind Farm

Meridian Energy / OPUS / Tonkin & Taylor (2006) & WWTL - Meridian Energy / BECA (2007)

For this project we had difficult terrain to contend with and very fractured rock due to the close proximity to major fault lines. Compounding this was the very high wind factor and extreme weather conditions in which we were operating.

Project scope

For the wind farm project we drilled more than 30 holes across the site on the ridgelines where the turbines were to be sited. Further bores were drilled for the wharf structure on the beach at Oteranga Bay where the submarine power cables come ashore and other investigations including inclined cored holes for suitable quarry material were carried out across the site.

For the transmission line project we carried out a number of holes at possible tower locations to assist with design of a new transmission line to carry the power from the Wind Farm to the national grid.

Complicating factors and solutions

Limited access, steep terrain, wet slippery conditions and very high winds were all complicating factors to overcome. The rock was very fractured due to the proximity of the main fault line and required the skills we have developed in working with Wellingtons' difficult ground conditions to successfully core the highly fractured weathered greywacke.

For the transmission line project no new roading could be constructed across the steep terrain, meaning careful planning and complicated logistics to get to the proposed tower locations. For example some sites required scaffold to fly the gear onto due to the steepness of the terrain.

Helicopter access

One of our helicopter portable units was used to reach the bore locations high up on the hillside that were only accessible by air. Due to the proximity of the national grid safety of both the network and all personnel was paramount and required meticulous planning before getting off the ground. This was made easier by our helicopter operator who routinely flies maintenance crews on live line work in and around the lines.


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This section shows examples of some of the most recent and key projects that Griffiths Civil Build have been involved in. It showcases the variety of work that we are capable of and gives details of the individual projects, along with a scope and other relevant details and images.

Repiling, Decking & House Repairs - Grafton Rd

This project involved carrying out repairs to an existing dwelling in Roseneath that had restricted access. Our role was to undertake repair work as identified during a pre-purchase building inspection and engineers report.

Concrete Retaining Wall & Access Road - Homebush Road

This project on Homebush Road in Wellington involved the construction of a substantial precast concrete retaining wall and other works to create an access road for a new multi-lot residential development.

Timber Retaining Wall - Home in Roseneath

This home had an old concrete retaining wall that had failed and was falling over in places. After repairing a broken pipe (causing the soil to become saturated and contributing to the old wall failing) we constructed a new timber retaining wall.

Decks & Verandahs - Aotea College, Porirua

To keep the new music block build on track, Naylor Love Construction approached us to assist with the build. This project included securing foundations for relocated buildings, constructing large deck, access ramps and framing.

Earthquake Strengthening - Royal NZ Police College

A major project and the first of its kind in New Zealand. It was particularly challenging and had to be completed outside of usual office hours so the College could remain open. Limited space, harder than expected rock and ground water had to be overcome to successfully complete the job.

Retaining Walls - Commercial Projects

Griffiths Civil Build have a comprehensive background of successfully completing a wide range of retaining walls. See examples of our work that include an RBI upgrade for Vodafone, a new retaining wall on Paekakariki Hill Road and work in the city for Victoria University,

2 Degrees National Rollout - NZ Wide

Details of the national rollout for 2 Degrees. Tier 1 covered work in all the major centres, Tier 2 involved more remote locations that required helicopter and 4X4 access, while Tier 3 saw the completion of over 100 cell tower sites all over the country.

Telecom NZ Site Builds - North Island

Cell phone tower construction throughout the North Island. The ‘roadside' project in Palmerston North required an onsite traffic management policy, the construction at Avalon needed specialist environmental precautions and Otaki was the first to utilise Telecom's own specific design.

Transpower Tower Foundation Strengthening

This project involved upgrading the foundations on transmission line towers in the upper South Island. We are proud to be associated with the 2007 New Zealand Engineering Excellence Awards Supreme Award winner.

Soil Nail Wall - Dowse to Petone

Construction of a retaining wall that included drilling and testing a sacrificial nail for design purposes, drilling and installing production nails, fabrication of nail heads, fixing mesh to the face and applying sprayed concrete.