The focus of this report is to provide Tauranga City Council (TCC) with high-level guidance on the volcanic ashfall hazard in Tauranga and its likely impacts on TCC infrastructure. For the purposes of this assessment, the TCC assets considered are the three-waters infrastructure and roads. This study consists of the following four steps:
- Assess and characterise the ashfall hazard using published material to determine the estimated ash thicknesses for selected recurrence intervals.
- Conduct an impact assessment for TCC infrastructure.
- Conduct a high-level review of existing ashfall hazard preparedness, response and recovery plans for TCC.
- Provide recommendations where future work should focus for volcanic ashfall risk management.
The report is intended for use by TCC to identify where future work for ashfall impacts should focus.