Gravel Extraction - Gravel Relocation

Historically gravel extraction from river beds was the main source of aggregates. Studies carried out by Council and Landcare Research Ltd have shown that in general there is limited sustainable replenishment of gravel in our main rivers. Consents to extract gravel are now focused on land-based sites such as quarries and open pits.

Some river management projects are required to relocate gravel within sections of a river particularly where single stream channels are controlled by rock work. Typically you'll see these around meandering bends. The huge cost of maintaining the rock work necessitates training works to stabilise the active channels and minimise the need for additional rock works.