Ballina Flood Protection Feasibility Study and Plan

A draft plan to help mitigate existing and future flood risks was prepared by GHD in October 2021 and placed on public exhibition in February 2022. Council adopted the Ballina Island and West Ballina Overland Flood Study and Flood Protection Feasibility Study and Plan report in May 2022. 

• Download the Ballina Island and West Ballina Overland Flood Study and Flood Protection Feasibility Study and Plan DRAFT  (58mb pdf)
• Ballina Island and West Ballina Overland Flood Study and Flood Protection Feasibility Study and Plan DRAFT - Appendices (17mb pdf)

Project Objectives

The Ballina Island and West Ballina Overland Flood Study and Flood Protection Feasibility Study and Plan (GHD) project objectives:

• Gain an understanding of how trunk stormwater drainage system (pipes larger than 450mm-diameter or equivalent) performs now and into the future considering climate change implications.
• Assess localised intense moderate to rare storms (10% -1% Annual Exceedance Probability [AEP]) in combination with tidal scenarios (Mean High Water Spring [MHWS], Real King Tide [January 2018], Highest Astronomical Tide [HAT]); under both present-day conditions and climate change implications being Sea Level Rise (SLR) and Rain Intensity High Range % Increase both to the projected year of 2100.
• Assess the viability of an early concept design standard for a regional flood protection levee system for Ballina Island and West Ballina.
• Develop a detailed Strategic Plan considering reforms to land-use planning, Development Control Plan (DCP), Local Environmental Plan (LEP), and alternative approaches that are effective and affordable, as well as other measures like but not limited to drainage capital works upgrades, flood warning and education, and road and house raising options.
• Ensure solutions are well-considered, have a higher level of confidence in cost and procurement feasibility, are environmentally sound, and gain community and stakeholder support.

Project Phases 

Recommended Floodplain Mitigation Measures

The Ballina Island and West Ballina Overland Flood Study and Flood Protection Feasibility Study and Plan has been completed and endorsed by Council for public exhibition at the November 2021 Council Meeting. 

A draft strategic plan was prepared outlining recommended flood mitigation measures for the region:

Additional Resources:

• Ballina Island and West Ballina Overland Flow Flood Study Report and Mapping - November 2020 (pdf)
• Ballina Island and West Ballina Overland Flow Flood Study Report and Mapping - Appendices ABCD - November 2020 (21mb pdf)
• Ballina Island and West Ballina Overland Flow Flood Study Report and Mapping - Appendices EFGH - November 2020 (12mb pdf)