15Assessment of societal and individual risk rating

15 Assessment of societal and individual risk rating

15 Assessment of societal and individual risk rating

(1) The owner of a declared dam (other than a proposed dam) must use the risk management framework under clause 14 to produce a written report on all foreseeable risks to the dam—

(a) at least once every 5 years, and

(b) if a major change is proposed to be made to the dam, at the time that the change is being designed that takes into account the proposed change, and

(c) if required to do so by Dams Safety NSW.

(2) The owner of a declared dam that is a proposed dam must use the risk management framework under clause 14 to produce a written report on all foreseeable risks to the dam at the time that the dam is being designed.

(3) In preparing a report under this clause, the dam owner must also set out in the report—

(a) the societal risk rating and the highest individual risk rating of the dam—

(i) calculated in accordance with the Societal and Individual Risk Rating Methodology published in Gazette No 113 of 18 March 2022, and

(ii) signed off by a competent person, and

(iii) for an extreme or high consequence dam, other than a high C consequence dam—reviewed by another competent person who is independent of the persons who carried out and signed off the calculation.

(b) an explanation as to any assumptions made in making that calculation.

(4) If the societal risk rating or highest individual risk rating for a dam is higher than the following (the safety threshold), the dam owner must forward a copy of the report to Dams Safety NSW as soon as practicable after the report is produced—

(a) societal risk rating for an existing dam (except as provided by paragraph (b))—0.001,

(b) societal risk rating for a proposed dam or for an existing dam that is to be subject to a major augmentation—0.0001,

(c) individual risk rating for an existing or proposed dam—0.0001.

(5) Dams Safety NSW may direct the owner of a dam for which the societal risk rating or highest individual risk rating is above the safety threshold to take specific steps within a specified time to ensure that the rating is reduced to the safety threshold or lower.