Sediment accumulation upstream of Audley Weir has significantly reduced the depth of the water column and provided a favourable habitat for the growth of aquatic weeds (eg Egeria densa, Ribbon Weed, Parrot?s Feather, and Cumbungi). Upstream landuse activities have caused erosion and released nutrients which have fostered weed growth.

The proliferation of aquatic weeds and continued reduction in water depth has impacted on the recreational amenity and heritage values of Audley Pool, particularly recreational boating. It has also had a negative impact on habitat values of the upper Hacking River .

This feasibility study investigated the recreational and environmental impacts of sedimentation of the Hacking River , detailed a site investigation and recommended management options for accumulated sediment in the Audley Weir pool. The study also assessed likely pollution sources in the upper-catchment and recommended management works and strategies to make improvements dealing with the problem.