Annex 8 - Safety in Design Report V1

Assumed Methodology & Equipment
Installation of the restoration beds is to be undertaken using an excavator mounted on a barge. During suitable
weather conditions, stockpiled restoration substrates are to be loaded onto a small barge, mixed as required and
transported to each restoration site where it is then installed on the river beach by excavator.
This proposed construction methodology has been successfully employed by TNC construction contractors in
shellfish restoration projects in port Philip Bay (VIC), Adelaide (SA), Albany and Swan River (WA), as well as by
the Department of Primary Industries for the restoration of rock oyster ecosystems in Port Stephens, NSW.




                                                                                           Photos: Kirk Dahle




Figure 4: Example of proposed methodology using barge mounted excavator to install restoration
substrates (Source: Kirk Dahle, DPI NWS)



3. HAZARD EVALUATION & CONTROL
Identified hazards are evaluated using a risk matrix that quantifies the risk as a function of likelihood and
consequence. Controls are identified, using the engineering hierarchy of controls, to reduce the risk score. The
process is documented in the risk register in (Table 1).
A residual risk (the final risk score after controls are applied) is quantified and documented to ensure
communication with all stakeholders.




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