During heavy rain events within the Rosewood township, significant flooding occurred along John Street through the main commercial centre of Rosewood.

This has resulted in considerable community concern and vocal appeals to local and state authorities to improve flood immunity through the town centre.

BG&E was engaged by the QLD Department of Transport and Main Roads to conduct a flood study, options analysis and business case.

Including

• Options development and analysis, as well as shortlisting options.
• Business case development.
• Flooding and drainage design.
• Design of roads, drainage and a benefit cost ratio.
• Civil, pavement, geotechnical and environmental engineering services.
• Cost estimates.
• Risk and multi-criteria analysis workshops.

Key objectives of this project included

• Improving the road network resilience and reducing the time of road closures caused by flooding.
• Improving flood resilience of the Rosewood township.
• Improving the existing road profile of John Street to be compliant with the required design standard.
• Increasing the drainage capacity of John Street to contain flows between kerbs and reduce the occurrence of flooding into adjacent properties.
• Increasing the asset life by rehabilitating the road pavement while minimising the depth of excavation, cost and disruption to local business during construction.
• Increasing safety for all road users.
• Providing a value-for-money solution.
• Ensuring no net worsening for flooding on private properties.

The benefits which will flow from achieving these objectives are

• Increased flood immunity to minimise road closures during and after rain events.
• Alleviation of concerns raised by local community, businesses and members of parliament.
• Increased asset performance and life.
• Increased road network, safety reliability and accessibility.