Pampoennek road project, South Africa

Engineering that blends with nature

Client

SANRAL

Project date

April 2008 - July 2022

Nestled within the mountainous Magaliesberg nature reserve near Hartbeespoort, the Pampoennek Road Project showcases how civil engineering can harmoniously coexist with sensitive ecosystems. Zutari’s involvement began in 2008 with a geotechnical investigation, laying the foundation for a road that respects and enhances its natural surroundings.

The opportunity

The road cutting through the Magaliesberg required significant excavation and retaining solutions due to steep slopes, in-situ soil conditions, and nearby Eskom powerlines. The project required a 7 km dual-carriageway road through a protected nature reserve, presenting complex environmental and geotechnical challenges. The goal was to ensure slope stability, protect wildlife, and minimise ecological disruption while delivering a safe and efficient transport route.
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What we did

We applied a multidisciplinary approach that balanced engineering precision with environmental oversight:

  • Geotechnical investigations and slope stability analyses informed the design of near-vertical retaining walls using soil nailing and shotcrete to ensure stability while limiting environmental impact.

  • To manage stormwater, a continuous piled wall with titan anchors and capping beams was implemented, along with controlled drainage.

  • Throughout construction, digital tools like 3D visualisation and drone surveys were used to monitor progress, while careful relocation of over 3,500 indigenous plants and erosion control measures ensured the environment was preserved.


Recognising the needs of local wildlife, a 6.5 m diameter corrugated steel underpass was installed to allow safe passage for large antelope and other species. Game-proof fencing was also installed to protect animals during construction.

Every step of the project integrated technical excellence with sustainable practices, creating a road that harmonises with the Magaliesberg landscape.
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Rock-scaping and shotcrete finishes blend retaining walls into the Magaliesberg landscape, earning international recognition for aesthetic integration.

The outcome

The project successfully delivered a 7 km dual-carriageway road with minimal environmental impact. The cutting through the Magaliesberg peaks at 19.5 m deep and spans 185 m wide, with over 500,000 m³ excavated. A 76.2 m-long bridge and concrete-lined drains enhance functionality.

The rock-scaping finish won the Outstanding International Project award at the 14th Annual Shotcrete Project Awards by the American Shotcrete Association. The game underpass ensures safe wildlife movement, and the landscaping efforts support ecological restoration.
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This project has again proved that civil engineering can harmoniously integrate development and minimal environmental impact.

By prioritising ecological preservation alongside civil engineering, the Pampoennek Road project is a testament to responsible infrastructure development. It proves that roads can connect communities without disconnecting them from nature.

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