During 2017 – 2019, we were engaged by Bay of Plenty Regional Council (BOPRC) to develop a design solution to remediate and prevent further erosion of a section of Waitangi Stream. Waitangi Stream connects Lake Ōkareka to Lake Tarawera in Rotorua. Our team carried out the geotechnical investigations required to build a ground model, which in turn informed the design. Two key elements of this project included:
- Raising the riverbed by rockfill, reducing sedimentation and helping to prevent further erosion of the riverbed
- Regrading the stream banks and placement of gabion baskets. This helped prevent further erosion of the banks.