28/05/2019
$60 MILLION SOUTH EAST FLOWS PROJECT COMPLETED, READY TO SEND WATER TO WETLANDS 🌊🦆🐸
The long-awaited, $60million South East Flows Restoration Project has been completed, and winter rains are expected to send water into local wetlands for the first time in years.
The last contractors left Kingston two weeks ago after construction work on the 93 kilometre channel began in early 2017.
Jointly funded by the state and federal governments, the system was designed to help with salinity management in the Coorong South Lagoon, increase flows to Upper South East wetlands and reduce drainage outflow at Kingston beach.
Project manager Mark de Jong says water that otherwise would have ended up heading to the ocean can now be used to restore local wetlands.
Water will be diverted out of the Blackford Drain near Kingston and will travel along the newly created flow path to the Coorong. Along the way it can be stored in wetlands like Tilley Swamp.
"One of the purposes of the infrastructure is to make the best use of the water when it is available," Mr de Jong said.
"Rather than sending water out to the ocean we can use it along the floodway for wetlands en route and deliver it to the Coorong if it needs it as well.
"Throughout the design process we've also had lots of discussions with landholders about what features along the alignment would assist their property drainage into the channel."
Nature Glenelg Trust manager Mark Bachmann said the original design was to include a drain only, but there was an opportunity to advocate for changes that allowed vital water to be stored in wetlands along the way.
"This stretch between Blackford and Coorong via the Taratap and Tilley Swamp watercourses was actually the destination of a lot of the South East's water originally - it's a natural flowpath and was going back to the original days of settlement," Mr Bachmann said.
He said drainage programs over the past 150 years saw water flows to Tilley Swamp pretty much cut off.
"That basically left thousands of hectares of former wetlands high and dry," he said.
"There was great goodwill shown by everybody involved and...this is an outcome we can all really be proud of. When Tilley Swamp starts to fill again you'll be able to see water as far as the eye can see, which is pretty exciting."
The department says the build came in on time and on budget, involving around 90 jobs. Maintenance of the system will be undertaken by the South Eastern Water Conservation and Drainage Board.
It's expected around 50 gigalitres of water will be available for the Coorong per year, over the long term.
PHOTO: Construction at Blackford Drain, courtesy of Natural Resources South East