South East Flows Restoration
- 44.3 million
- DIT
- Southern Eastern Adelaide
- Dams and Water Storages, Environmental Water Management
- Design and Construct
Background
Leed delivered the South East Flows Restoration Project, designed to manage salinity in the Coorong South Lagoon, enhance wetlands flow in the Upper South East, and reduce drainage outflow at Kingston Beach. With over 450km of drainage and floodway construction experience in the region, a deep understanding of the challenging ground and climate conditions ensured project success.
Scope
- 83 km of open channel construction and modification, requiring more than 3 million cubic metres of earthworks
- 60 precast concrete flow regulation structures and diversion structures including penstocks, lay flat gates and stoplogs
- drainage and erosion protection
- access road embankment earthworks
- temporary and permanent pavement upgrades to existing tracks
- vegetation clearance
- fencing, gates and guardrails
- power supply and electrical works
- service relocations
- extensive landowner and stakeholder engagement
Innovation
Key innovations included design changes to concrete structures and shifting from in-situ to precast elements in areas with poor ground conditions, which improved constructability and reduced costs. The project created substantial value for the local community, exceeding employment targets and offering opportunities for apprentices and trainees.
Outcomes
Despite two wet winters, the project was completed on time and under budget, with excellent stakeholder management and strong community support. Leed’s commitment to cultural awareness and local engagement ensured a harmonious, productive, and impactful project.
