Botanical Hill Completion, Nelson

Client : Nelson City Council
Scope of works : Slope stabilisation

Earlier this year the team wrapped up a challenging slope stabilisation project on Botanical Hill in Nelson, delivered for Nelson City Council alongside Tonkin + Taylor.

Before a single bolt could go in, our rope access team manually cleared around 90m³ of material and vegetation from the face entirely by hand. With no machinery access and limited room to move, it was a significant undertaking.

From there, 30 rock bolts were drilled 6 metres into the slope, with all drilling carried out from a basket suspended by a 60 tonne crane to keep the work safe and accurate on a steep face. The bolts then anchored the steel detail and drainage system before 50m³ of steel reinforced shotcrete was applied over two days, working from a fixed man cage on a hiab truck.

Black oxide was added to the mix to help the finished surface sit naturally within the environment, an important detail on a landmark like Botanical Hill.

We're really happy with how this one came together, and looking forward to more work with NCC and Tonkin + Taylor down the track.