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What is a Stormwater Management Plan?

A Stormwater Management Plan (SMP) is a strategic planning document which aims to address existing stormwater problems within a catchment, or catchments, and identify opportunities for providing a range of benefits through a multi-objective planning process. This multi-objective planning includes consideration of flood risk, protection of water quality and opportunities for stormwater reuse.

In the context of the City of Whyalla, the catchments are shown by Whyalla SMP Figure 2.2 and the area considered by the SMP is defined by a study area shown in Whyalla SMP Figure 2.1 below.

Whyalla SMP Figure 2.1 Study Area(1861 kb)

Whyalla SMP Figure 2.2 Major Catchments(1666 kb)

Why has the Stormwater Management Plan been prepared?

There have been numerous occurrences of flooding within Whyalla, including those in November 2015 and September 2016. Whilst heavy downpours have historically resulted in nuisance flooding within the city, there had been no detailed assessment of the flooding risk posed by varying rainfall events to clearly document the extent and severity of problem areas.

In response to this, Council, with financial support from the State and Federal Governments, has commissioned Tonkin Consulting to develop a Stormwater Management Plan for the City of Whyalla.

The document provides a clear understanding of the current issues and will enable Council to develop a consistent, sustainable, environmentally aware and integrated approach to stormwater management which will provide a framework to address priority drainage issues, integrate future development, land use and infrastructure planning across the city.

Whilst largely driven by the need to address stormwater flooding within the city, Council are also keen to explore opportunities for integrated water management, including addressing the quality of water discharging to Spencer Gulf and potential reuse to augment Council’s existing non-potable irrigation scheme.

Whyalla's Stormwater Management Plan

The Whyalla Stormwater Management Plan:

  • Clearly sets out the objectives for managing stormwater in the city;
  • Identifies actions (both structural and non-structural) to manage stormwater to achieve beneficial outcomes and meet the specified objectives;
  • Provides justification for further catchment studies, works, measures and actions;
  • Provides an initial estimate of capital and recurrent costs, priority and timeframes for each of the identified actions; and
  • Defines the obligations of the relevant parties in funding, implementing and communicating the plan.

 The Whyalla Stormwater Management Plan has been jointly funded by:

If you would like further information on Whyalla’s Stormwater Management Plan an appointment may be made with a Council Officer by contacting Customer service on 08 8640 3444.

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