In May 2018, a 600,000-litre raw water tank failed. It was a rubber-lined steel construction. At the time of failure, the tank was near full capacity. The outrush of water affected an operational area of 24,000m², displacing pumping infrastructure, ladders and associated debris.
There were no personnel in the vicinity at the time of failure.
Direct causes
- The structural integrity of the water tank had deteriorated substantially due to corrosion.
Contributory causes
- Inadequate inspection and maintenance management of the water tank.
- Failure to ensure the condition of the structure remains within the design limits.
- Failure to assess the structural integrity of the tank by a competent person with appropriate training and experience.