Development Application - Part 2 of 2 - Report & Plans · OPW11/0116

The following outlines potential impacts of the works. Works are to be undertaken in such a way that impacts are minimized
wherever possible. Monitoring to ensure that any impacts are within acceptable levels is detailed below.

     6.1 Water Quality

The dredge will operate in such a way to minimise turbidity during dredging operations.

To ensure that water quality [pH, DO, Turbidity] remains within acceptable limits, visual monitoring of the plume is to be
undertaken as well as any required water quality testing in accordance with ERA requirements. Visual observations for oil,
grease, floating scum and litter is to be carried out on a regular basis.

     6.2 Noise

The works are separated from the businesses and resorts on Hastings St by at least 620m of well-developed vegetation. It is
not anticipated that works will cause an issue in this area. The dredging, submerged closure and training wall / groyne, the
plant will be over 400m from the residences of Noosa Sound and separated by 60m of well-vegetated area on Noosa River
Spit. When undertaking the wall at the end of Noosa River Spit, the works will be within 350m of the residences on Quamby
Place (Noosa Sound) and noise could potentially be an issue, particularly outside of normal working hours.

The Contractor shall take all reasonable precautions (e.g. the use of mufflers) and undertake works in such a way as to
minimize the potential for noise nuisance to residences and businesses and meet the requirements of the ERA conditions.

Given the nature of the work and the environment, there will be a need to work in conjunction with the tides and so works
may need to be undertaken outside of normal working hours. There is no restriction on working hours provided that the
required noise limits are met.

An aural inspection is to be undertaken daily and if any issues are identified or complaints are made regarding noise levels,
noise monitoring compared to nominated levels is to be undertaken if works are to continue in this area.


     6.3 Flora

Due to the mobility of the channels and shoals and the high erosion rate, the area is characterized by a clean sandy seabed
(Figure 5). There are no seagrass beds present within the footprint of the proposed works.




Figure 5: Sandy shoal

The only mangroves within proximity of the works are at the south-eastern end of the wall at the end of the Noosa River Spit
(Figure 6). The wall terminates adjacent to the mangroves, but works are to be undertaken in such a way that no mangroves
are to be interfered with as part of the works.