Trinity Valley Drainage Upgrade Stages 2 & 3
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Trinity Valley Drainage Upgrade Stages 2 & 3
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Category: Stormwater drainage network
Project management
Managed by City of Norwood Payneham & St Peters
Design: Stantec Australia
Contractor to be confirmed.
Project details
The Trinity Valley Drainage Upgrade will reduce the risk of flooding in the suburbs of St Morris, Trinity Gardens, Maylands & Stepney – which is known as the Trinity Valley.
The new stormwater drainage infrastructure will reduce surface flood waters during storm events by capturing stormwater and temporarily storing it in a detention basin at St Morris Reserve, as well as underground detention tanks within the road network.
The works are designed to:
- increase capacity of stormwater infrastructure
- alleviate future flooding where possible
- protect dwellings from future one in-100-year stormwater events
- utilise Council reserves to act as detention areas
- address upstream flooding to reduce pressure on downstream system.
Project funding
The Federal Government is contributing $9.9 million as part of its Preparing Australia Program, which targets projects that improve resilience against natural disasters.
The investment is being matched dollar by dollar by the Council, resulting in a near $20 million investment to reduce the risk of flooding.
Timeframe
The upgrade works will be completed over three years in the following order:
- Stage 2 & 3: September 2023 – March 2024
- Stage 4: November 2023 – April 2024
- Stage 1: August 2024 – January 2025
Project background
The upgrades to stormwater drainage infrastructure stems from the City-wide floodplain mapping project which identified locations which are at risk from flooding and considers a range of future scenarios, including infill development and the ongoing impacts of climate change.
Cost
Estimated $20,000,000
Project Contact
Contact Paul Mercorella
Contact role Manager, City Assets
Phone 08 83664517
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