Irwin Street Upgrade

Irwin-Street-Upgrade

Project Details

As part of the Urban Forest Plan Infill Street Tree Planting Program, the City of Perth has designed and installed a range of innovative and bespoke water retention tree pits across the city.

WSUD Category: Tree pits

CriteriaInformation
Development Type:Infrastructure
Function/Driver:Water quality
Government Area:City of Perth
Site Context:Well-draining soils
Year Completed:2017

Overview

As part of the Urban Forest Plan Infill Street Tree Planting Program, the City of Perth has designed and installed a range of innovative and bespoke water retention tree pits across the city.

Each pit is designed to capture and filter stormwater run off from city streets to improve water quality and promote a sustainable approach to water management within the urban forest.

The pits help deliver additional water to our street trees. This promotes the development of large and healthy tree canopies which cool the city and creates green, shaded and attractive city streets.

The City of Perth made design changes to its standard granite kerb water retention tree pits to address challenges that emerged with the original design. This included installation of the UPVC pipe below the road surface,with the following advantages:

  • less excavation is required to create appropriate tree pit depth, limiting conflict with existing underground services
  • water is delivered to the base of the rootball instead of the top levels of soil. This helps to improve soil moisture content and promote deep root growth and improved tree health.

This design is generally no longer used and has been replaced by the City’s new ‘in-road’ water retention tree pit, where appropriate.

Contact Officer: Barbara Meldrum

Email: [email protected]