Category: Stormwater drainage network
Managed by City of Norwood Payneham & St Peters
Trinity Valley 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 upgrade works will be completed over three years in the following order:
Stage 4: St Morris Reserve Upgrade
The St Morris Reserve Upgrade forms part of the Council’s Trinity Valley Stormwater Upgrade Project to manage flooding in the suburbs of St Morris, Trinity Gardens, Maylands and Stepney.
Through the upgrade, the Council seeks to create a well-designed, attractive area of open space that not only assists in mitigating the flood risk in and around the City of Norwood Payneham & St Peters but also contributes greater environmental, social and cultural benefits to the local community, and in promoting opportunities for healthier lifestyles and social cohesion.
Works in surrounding streets
In addition to works within St Morris Reserve, Stage 4 will also include the installation of large culverts, pipes and pits within the roadway of four surrounding streets in the St Morris area, to increase the capacity of underground stormwater storage.
The streets included in the Stage 4 works are:
- Third Avenue (from Glynburn Road to Gardiner Avenue)
- Green Street (from Third Avenue to Seventh Avenue
- Seventh Avenue (from Green Street to Gage Street)
- Gage Street (from Seventh Avenue to Gwynne Street).
View a map of the Stage 4 works areas:
Works on Stage 4 are in the preliminary stages and it is anticipated that construction will commence in January 2024 and be completed in mid-2024. Dates will be revised following completion of the tender phase.
The St Morris Reserve Upgrade will be funded as part of the Council’s $20m Trinity Valley Stormwater Upgrade Project.
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.