In this issue



   - In this issue



SPEL Approvals

-  Council Acceptance



BCC’s Flood Overlay Code

-  Section A



Wrap Up

   - See you next month



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Hello everyone and welcome to the May edition of “Keep Things Flowing”, the monthly newsletter presented by Storm Water Consulting.

In this month’s issue of Keep Things Flowing, we provide an update on the recent Council approvals for the SPELFilter and we take an in depth look at Section A of BCC”s Flood Overlay Code.


SPEL Approvals

Over the past 18 months the stormwater quality industry has seen significant changes. Councils across South East Queensland have started to approve and accept the use of different tertiary stormwater treatment devices. One such new device is SPEL’s “SPELFilter”. We presented information about this device in one of our newsletters last year. Just in case you forgot what a SPELFilter is, we’ve provided you with a short summary below.

The SPELFilter is pictured and described* below.

*SPEL’s description of the product

The SPELFilter has an upflow treatment process, through a spiral wrapped media configuration that maximises surface area. The benefit is excellent pollutant removal in a small footprint. Hydraulic pressure forces water through the filter media, discharges through the centre tube and out through the outlet collection manifold. Upon completion of a treatment cycle, each cartridge backwashes and effectively dislodges particulates from the filtration layers. This re-establishes filter porosity. The dislodged particles accumulate on the vault floor for easy removal during maintenance.

The SPELFilter system can be housed in a variety of structures including manholes, precast vaults, or cast-in-place structures.

SPEL have informed us that the SPELFilter has officially been approved for use in the following Councils within SEQ:

·         Brisbane City Council;

·         Redlands City Council;

·         Ipswich City Council;

·         Gold Coast City Council;

·         Moreton Bay Regional Council;

·         Sunshine Coast Council;

The extra competition within the stormwater quality industry will ensure that developers will benefit with reduced costs and better performance of stormwater quality treatment products. A range of stormwater treatment products can be viewed on the following websites.

Stormwater360 –




If you require stormwater quality treatment for your development please contact our office and we would be more than happy to assist you with your query.


BCC’s Flood Overlay Code

We often work with clients that are involved in projects dealing with a single dwelling (within Brisbane City Council). In July 2014 Brisbane City Council released a new Cityplan which requires the Flood Overlay Code to be addressed when a development property is located within a Flood Planning Area. Section A of the Flood Overlay Code is to be addressed for self-assessable and assessable development of a dwelling house including any secondary dwelling. There are four items that need to be addressed to comply with Section A of the Flood Overlay Code.

1.     The velocity of flood water must be determined. The velocity is used to ensure the foundations of the dwelling are constructed in accordance with the Queensland Development Code requirements. We are able to determine the flow velocity of the flood water.

2.     Minimum finished floor level requirements must be met. The Flood Overlay Code requires habitable and non-habitable floor levels to be set 500mm and 300mm (respectively) above the governing flood level affecting the site. SWC is able to identify the governing flood level affecting the property and set minimum finished floor levels.

3.     Dwellings with suspended floors that are impacted by flood water are required to provide 1.5-2.5m of undercroft clearance height. If you are unable to achieve this then a performance outcome solution may be provided to support a lower undercroft height. An assessment of the flooding characteristics is required to support a lower undercroft height.

4.     The development must not create an adverse impact on neighbouring properties. Blocking or diverting flood water has the potential to create adverse impacts to neighbouring properties. An assessment of the proposed development is required to determine any impacts and if necessary, design a strategy to mitigate the impacts.

If you have a development located within a BCC Flood Planning Area we would be pleased to provide our assistance with the application.


Wrap Up

We hope you enjoyed this edition of Keep Things Flowing. Feedback on articles presented is always welcomed and for further information on any of the articles presented please don’t hesitate to contact our office.

As always, Keep Things Flowing!

The Storm Team


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