The department of water and sanitation has issued a dam safety directive to “address serious and ongoing safety risks” at My Own Dam — publicly known as Senteeko Dam — in Mpumalanga. Photo: DWS
The department of water and sanitation has issued a dam safety directive to “address serious and ongoing safety risks” at My Own Dam — publicly known as Senteeko Dam — in Mpumalanga.
The directive, issued under the National Water Act, was served on the dam owner, the Shamile Community Property Association, on Tuesday and “requires immediate, time-bound action to stabilise the dam and prevent further deterioration in order to protect lives, livelihoods and property downstream”.
Wisane Mavasa, the department’s spokesperson, said the intervention followed technical assessments that had confirmed that the dam remained in a compromised and partially failed condition.
“Without urgent remedial action, further deterioration is likely to continue,| he said.
“As outlined in the directive, these conditions pose an unacceptable level of risk that cannot be adequately managed through monitoring alone. The department is therefore acting decisively to ensure that the dam owner fulfils their legal responsibility to maintain the dam in a safe condition.”
Mavasa warned that the implications of inaction were significant because continued deterioration of the dam posed a threat to downstream farming communities, including the potential loss of life, damage to homes and infrastructure.
“These risks are heightened during periods of rainfall and cannot be ignored or deferred. For this reason, the department is clear that the risk associated with the Senteeko Dam has not yet been averted, and regulatory enforcement will remain in place until that risk is meaningfully reduced.”
While water levels in the dam have dropped, the reduction had not been sufficient to eliminate the risk of failure, she said. Engineers had avoided lowering the water level too rapidly because that could trigger a rapid drawdown failure of the compromised dam structure, which would significantly worsen the situation.
To address the prevailing risk, the department has directed the dam owner’s appointed professional engineer (APP) to urgently assess the condition of the dam and determine the specific remedial measures required to prevent further deterioration and reduce the risk of failure.
The determinations must be completed within seven days from the date of the directive and submitted to the department’s dam safety office for review and approval.
“Once the proposed measures are approved, the department will require the dam owner to immediately commence urgent repair works, including the appointment of a competent and suitably qualified contractor.
“All repair works must be carried out under the supervision of the APP and continue until the department is satisfied that the dam no longer poses an unacceptable risk to downstream communities.
“The department will prioritise all necessary regulatory approvals to ensure that corrective work proceeds without delay. Protecting human life, property, and livelihoods downstream of the Senteeko Dam remains the department’s foremost concern,” Mavasa said, adding that the department would continue to closely monitor the situation.