Bermagui residents want an explanation for how ‘mud sludge’ was allowed to run off from the Sapphire Cove Development site into the harbour. The answer it seems was inadequate sediment control and monitoring at the site.

When the coastal low hit Bermagui, mud, dirt and silt from the site washed across the golf course, into the ecologically sensitive mangroves, the usually pristine harbour, out to sea and into the Bermagui River, close to oyster leases.

Apparently, approval for the development by Council came with a requirement that the developer put in place sediment control measures.

The Developer’s Construction Environment Plan states they will:

• Install sediment control structures in accordance with the Subdivision Works Certificate prior to commencement
  of works.
• Keep all sediment control measures in good operating condition, functional at all times, with regular maintenance.
• Assess weather conditions prior to and during operations. Consider temporarily halting works until more favourable weather.
• Management and mitigation measures must be put into place if sediment-loaded runoff is likely to occur or a rainfall event is predicted.

Given the scale of sludge, it’s not unreasonable to conclude these measures were not done. In some good news, the Council has advised they will investigate what went wrong, but explaining this was an ‘intense rain event’ is no answer. Hard questions need to be asked:

• Were all the Construction Environmental Management Plan actions implemented?
• Did Council inspect the site and confirm sediment control was in accordance with the Subdivision Works Certificate prior to commencement of earthworks?
• Did Council sign off on the Management Plan prior to earthworks commencing?

The investigation outcomes must be made public, and any findings of non-compliance should incur fines and remedy. The mud sludge has heightened community concerns about the environmental impact of the proposed Nutleys Creek Rd development.

Serena Lillywhite
Bermagui

Photos

Above: The muddy runoff is clearly seen in the harbour, photo: Surfingwiththemob.
Below: The harbour was affected by the sludge, photo: Serena Lillywhite.