1. Publicly available inundation mapping showing the affect of flood, Dam Over topping and Gate Failure on up and down stream properties must be made available by the Constructing Authority prior to approval of and installation of Dam Infrastructure.
2. Prior to approval of proposed Dam Infrastructure the Constructing Authority must be able to show that affected stakeholders (such as Allans) both upstream and downstream have been offered the opportunity to participate in the provision of local and historical flood knowledge and evidence that may enhance the mapping for critical Incidents and Events. (Evidence of consultation might be copies of letters distributed to individual property owners).
3. Prior to approval of proposed Dam Infrastructure the Constructing Authority must be able to show that affected stakeholders have been contacted both up and down stream to provide input into the Emergency Action Plan, Dam Safety Evacuation plans and methodology, for example isolated property owners would be better able to advise on meeting spots for helicopter evacuation etc, that they were able to easily reach without being caught in rising waters. Wide Bay Water Corporation (Hervey Bay Queensland) did not have modelling of upstream events prior to February 2008.
4. Prior to approval of proposed Dam Infrastructure the Constructing Authority must be able to show that, critically-at-risk residents upstream and downstream have been offered relocation and that modelling of possible events has included an assessment of the affect on populations both up and down stream.
5. Prior to approval and installation of Dam Infrastructure, the Constructing Authority must show evidence of consultation with Emergency Services at a Local and State level in formulating Emergency Action Plans and Evacuation Planning.
6. At the moment it seems the Dam Safety Regulator is either loath or unable to penalise or enforce recalcitrant Dam Operators such as Wide Bay Water to the full extent – new legislation and regulation should provide clear enforcement guidelines and established financial and career penalties for lack of compliance by the Operator or Constructing Authority.
The Lenthals Dam Gate Failure (Hervey Bay Queensland Australia) incident illustrates the urgent need for the above issues to be addressed in legislation. Lenthals Dam is also know as Lake Lenthalls and is owned and operated by Wide Bay Water Corporation who operate the automated crest gates.
Organizations like ANCOLD (The National Committee on Dam Large Dam Incorporated) and ICOLD (International Commission on Large Dams) have a role of raising awareness, sharing of research outcomes and training, but ultimately government has the role of legislature.
Stay In Touch