Category: Stormwater drainage network
Managed by City of Norwood Payneham & St Peters
Trinity Valley Drainage Upgrade overview
The Trinity Valley Drainage Upgrade involves the installation of a new stormwater drainage network in the suburbs of St Morris, Trinity Gardens, Maylands, and Stepney (known collectively as the ‘Trinity Valley’).
The upgrade project includes the installation of a new underground drainage network and stormwater detention basin at the St Morris Reserve, to reduce the risk of flooding within the catchment area during significant rainfall events.
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.
The Trinity Valley Drainage Upgrade will be delivered in four stages over a four-year period from 2021 to 2025 as follows:
- Stage 2 & 3: October 2023 – May 2024
- Stage 4: March 2024 – Late-2024
- Stage 1: August 2024 – January 2025
Stage 1 is a continuation of the Trinity Valley Drainage Upgrade: Stage 2 & 3 in the suburbs of Maylands and Stepney.
Works will include upgrades to the existing stormwater infrastructure and installation of new stormwater detention culverts.
Detailed design for Stage 1 is underway with works scheduled to commence in August 2024.
The Federal Government is contributing $9.9 million as part of its Preparing Australian Communities 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.