Client: Eastland Generation LTD
2024
MaCC assisted Eastland Generation LTD with preliminary civil design of geothermal field earthworks, access tracks, stormwater management, and earthworks environmental controls to support a resource consent application.
In collaboration with Eastland Generation Limited, McCaffrey and Cable Consultants Ltd (MaCC) developed a civil design and stormwater management strategy to support consent applications for the proposed Taheke Geothermal Power Station, situated just 18km northeast of Rotorua. In late 2024 an independent panel confirmed that resource consents had been granted allowing the project to progress.
The civil designs address challenges posed by significant earthworks and increased impervious surfaces, which can disrupt natural water flows and create stormwater management issues. To mitigate these effects, MaCC designed a stormwater system that includes diversion swales, attenuation basins, and advanced treatment devices like oil-water separators. These features manage water quality, control erosion, and ensure peak flow regulation during heavy rainfall events.
A key aspect of the strategy is its integration with the natural landscape. Existing watercourses and overland flow paths are retained and upgraded to preserve the region’s hydrology, while newly designed basins and swales blend into the terrain. Extended detention measures and riprap protection further prevent erosion and sediment displacement, safeguarding Lake Rotoiti and surrounding waterways.
This forward-thinking plan not only meets environmental standards set by Bay of Plenty Regional Council but also aligns with the principles of kaitiakitanga (guardianship) over New Zealand’s natural resources. MaCCs civil engineering design solutions demonstrate how infrastructure can drive progress while preserving and respecting New Zealand’s natural environment.
