Urban Creek Project 1 Construction

Overview The City of Onkaparinga has secured funding through the Australian Government's Urban Rivers and Catchments Program to deliver a significant waterway restoration project along approximately 5.3 kilometres of Panalatinga Creek and Serpentine Creek, traversing Happy Valley, O'Halloran Hill, Reynella East, Old Reynella and Woodcroft. Purpose The purpose of this project is to create indigenous waterway and landscape habitats along the creeks. The pond systems will also serve to treat stormwater and contribute to the amenity of the linear reserves. The project will restore historically degraded waterways impacted by urban development, including pollution, erosion, sediment deposition, loss of native vegetation and structural modification of creek systems. Objectives Improve water quality Enhance aquatic and riparian ecosystem functions Address creek stability issues Increase the long-term resilience of the catchment Scope The main components of works required include: Sedimentation ponds Habitat pond Removal of concrete low-flow channel Removal of (poisoned and dead) woody weed trees Shaping and creation of a naturalised waterway channel Constructing landscape mounding using spoil from other works Maintenance access tracks Installation of hard structures to support the ponds, including gabion walls, concrete weirs, headwalls, rock beaching and culverts Construction Planning Preparing Site Environmental Management Plan Traffic Management Plan Proving existing services Obtaining required permits Installing site security measures, including fencing and work site facilities Demolition Tree removals (removed as whole trees to use as habitat) Removal of (poisoned and dead) woody weed trees, poisoning by others Removal of in-stream concrete channel, pits and pipes Stripping and stockpiling topsoil for reuse Civil Works Dewatering Excavation works Construction of multiple sedimentation ponds, including impervious liner Cement treated rubble placement Pond structures, including concrete weirs, rock chutes and pipework Maintenance access tracks Waterway shaping Installation of erosion control matting Placement, compaction and trimming of landscape mounds Site clean up Landscape Works Refer to the landscape plans and specifications. Pedestrian paths Boardwalks across waterways Pedestrian stepping stones across waterways Balustrades Seats and resting areas along paths Installation of bird perches Planting of the wetland (plant supply by others) Landscape planting in specific zones (plant supply by others) Contractor Requirements All works must conform with the most up to date Australian standards and recognised industry best practice at all times Tender Briefing and Site Inspection A site briefing session will be held for this opportunity. Date: 24 September 2026 Time: 10:00 am Notes: Meet at Byards Road at 10:00 am, then travel to Malbeck Drive. Estimated time onsite is 15 to 20 minutes. The two locations are approximately 5 minutes' drive apart. A link to the map location has been provided in the Project Overview.