On Sunday 14 June, 2015 a 2,500-tonne silo at Osborne collapsed while it was being loaded with dry cement from a container ship creating a blast that caused extensive damage and showered the immediate area with a plume of dust.
The EPA Emergency Response Team (ERT) was activated at the request of SafeWork SA to isolate the cement to the site by blocking stormwater pits with sandbags as a precaution.
Cement in the vicinity of the silo was approximately 30 centimetres thick and covered an area of around 3,000 square metres, however no cement went directly into the river.
Six vacuum trucks were used to remove the cement and stormwater pits were kept isolated during this process.
The potential for the Port River being polluted in this incident was considered a moderate risk and of low impact.
