Brayland Lagoon is a significant wetland covering 113 hectares with links to the Nogoa River and its anabranch. In a heavily fragmented landscape, the wetland retains important remnant bushland and a small pocket of endangered sub-dominant coolibah woodland.
In addition to being an inefficient way to deliver irrigation water, Brayland Lagoon was used to drain irrigation tailwater and stormwater run-off from 180 hectares of irrigated fields, substantially increasing the risk of contaminants reaching the Nogoa River.
With the support of Fitzroy Basin Association Inc. (FBA) through funding from the Australian Government’s Reef Programme, Cowal Agriculture redirected irrigation supply, tailwater and excess stormwater via earthen supply channels instead of using the wetland, thus reducing the risks to the wetland and Nogoa River.
Hamish also worked with FBA contractor Liz Alexander from Blue Dog Agribusiness to develop the significant infrastructure investment project, which started in July 2015 and took over four months to complete. The task involved extensive earthworks to lay 220 metres of 900mm pipe underneath the wetland, which was no small feat. This pipe created an inverted syphon between two supply channels on either side of the lagoon. Not only is the wetland now protected, but irrigation is significantly more efficient as water is only pumped once.