Wind Farm Case Studies

Tararua Wind Farm  

TrustPower Ltd engaged RILEY to undertake work on Stage 3 of the Tararua wind farm near Palmerston North.  The commission involved:

  • a comprehensive geotechnical assessment of the foundation conditions and requirements for each new turbine location;
  • slope stability analysis and upgrading for an associated roading network; and
  • a geotechnical assessment, including slope stability analysis, of the proposed disposal area.
Mahinerangi and Kaiwera Wind Farms  
Geotechnical investigations and civil engineering design of two proposed wind farms to support resource consent applications. The proposed wind farms consist of 90 turbines of 3MW each plus 25km of connecting roads, and 200 turbines of 3MW each plus 37km of connecting roads respectively. Preliminary designs assessed earthwork activities, erosion and sediment control measures and stormwater management. Assessments also required the optimisation of turbine and road locations, stability assessment, groundwater depressurisation, on-site aggregate assessment for pavement construction and concrete batching. The quantity of earthworks estimated to form the wind farms is 2.62 million³ and 2.53 million³ respectively.
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