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Trinity Valley Stormwater Drainage Upgrade: Stage 1

Trinity Valley Stormwater Drainage Upgrade: Stage 1

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Category: Stormwater drainage network

Project management

Managed by City of Norwood Payneham & St Peters

Design: TBA

Contractor: TBA

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’) and will be undertaken in four stages.  

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.

Stage 1 

The final stage of the Drainage upgrade, includes new drainage in the suburbs of Maylands and Stepney and is scheduled to commence in early 2025.

Works will include upgrades to the existing stormwater infrastructure and installation of new stormwater detention culverts.  

Project funding

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.

More information

For more information about the stages of the Trinity Valley Drainage Upgrade, visit:

Site Address

Clifton St, Maylands, SA

Cost

Stage 1: $7,500,000

Project Contact

Contact Michael Moshos

Contact role Project Manager, Civil

Phone 08 8366 4571

Email mmoshos@npsp.sa.gov.au

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Timeline

  • Trinity Valley Drainage Upgrade: Stage 2 & 3

    October 2023 – May 2024

    Complete

  • Trinity Valley Drainage Upgrade: Stage 4

    Late 2024

    Scheduled

  • Trinity Valley Drainage Upgrade: Stage 1

    Early 2025

    Scheduled