geotech investigations

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  • Aerial photo of Transmission Gully Wellington

    Transmission Gully

    Transmission Gully is the biggest road construction challenge in the Wellington region. We began exploration work in 2007 for Opus. Further work was undertaken in 2013 for MWH and NZTA, with detailed geotech investigations for Leighton Contractors and Coffey Geotechnical in 2014 and 15.

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  • Griffiths Drilling workers and drill rig working at Wind Farm

    Wind Farm

    Limited access, steep terrain, wet slippery conditions and very high winds were complicating factors. Also the rock was very fractured due to the proximity of the main fault line.

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  • Griffiths Drilling onsite at Muldoons Corner on State Highway 2

    Muldoons Corner

    This is a difficult section of SH2 which needed realignment. It’s located near the summit of the narrow Rimutaka Hill Rd and features tight corners, no shoulder and near vertical faces above and below the road.

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