Shopping Precinct Stormwater System

The development comprises a single-storey commercial building accommodating multiple tenancies (Shop 01, Shop 02, and Shop 03), with associated parking and service areas. The layout includes retail spaces, staff amenities, and external vehicle access zones, requiring integrated drainage design across both building and site areas.

As shown in the floor plan, the development incorporates:

• Multiple retail tenancies with shared services
• Front car parking and circulation zones
• Roof drainage systems connected to site stormwater infrastructure
• Defined finished floor levels and external grading requirements

Incon’s scope included contour survey coordination, stormwater drainage design, and preparation of documentation for council submission.

The project presented several key engineering challenges:

• Greenfield site conditions, with limited existing infrastructure and no prior drainage framework
• Planning approval requirements, necessitating a compliant stormwater design aligned with council expectations
• Coordination between architectural layout and drainage design, particularly around parking areas and building interfaces
• Uncertainty regarding detention and advanced modelling requirements (e.g., MUSIC/DRAINS), requiring early-stage risk management
• Optimising site grading, ensuring effective surface runoff without compromising accessibility or building levels

Additionally, the commercial nature of the development required careful consideration of runoff volumes, peak flows, and long-term maintainability.

Incon delivered a streamlined and compliant engineering solution through:

• Preparation of a stormwater drainage concept and site works plan, aligned with Planning Authority submission requirements
• Coordination of contour survey data to establish accurate site levels and drainage flow paths
• Development of roof and surface water collection systems, ensuring efficient discharge from building and hardstand areas
• Design of practical site grading strategies, balancing drainage performance with accessibility and construction feasibility
• Early-stage risk identification regarding detention and hydraulic modelling, allowing the client to confirm council requirements prior to detailed design
• Provision of clear, submission-ready documentation, enabling efficient approval processing

• Enabled smooth Planning Authority submission with compliant drainage design
• Reduced project risk by identifying potential modelling and detention requirements early
• Delivered cost-effective design by avoiding unnecessary overdesign at concept stage
• Improved coordination between architectural and civil elements
• Provided a practical and buildable stormwater solution for a commercial development