Work to repair a dropout at on Cape Palliser Road above the Hurupi Stream has been completed, approximately 1.4km from the Putangirua Pinnacles Scenic Reserve turn-off.

The shoulder and westbound lane had eroded leaving an approximately 7m deep by 10m wide dropout.

Failure of the road edge was attributed to surface water exiting at the shoulder above the site as well as saturation of the soft fill material, which was used to form the road over the natural gully.

A mechanically stabilised earth (MSE) retaining wall would be the traditional method for reinstating this type of defect however an innovative approach was taken by Council contractors using Ecoreef system for repairs, with major works being completed in just six days. All modules, materials and contractors were either sourced or manufactured locally.

Build Statistics:

• Works duration: 38hrs (including culvert work)
• Total modules: 155
• Base width: 8m Shoulder width: 15m Structure height: 7m
• Site projected area: 80m2 (front on)

The project was delivered on time and within 5% of the accepted price. Additional pods were required once the site was opened up is the variation in price.

Take a look at the timelapse video of start to finish.