Following the February 2022 flooding disaster, the community of Tweed and surrounding villages have been severely impacted, and Tweed’s Road network has experienced landslides, damage to bridges, and hundreds of roads are in need of repairs.
CMC have been engaged by Tweed Shire Council to undertake the Design and Construction restoration of four major landslips along the Tweed River at sites Kyogle Road A, B & C and Mount Warning Road. At the Kyogle Road sites A and B, approximately 3 meters of flood waters covered the road. At all four sites along the Tweed River, flood waters eroded the riverbanks and washed away all the land adjacent to the road.
Complex Geotechnical Solutions: Restoration involves addressing landslips with varying geological conditions. Geotechnical drilling and geomorphology assessments allowed for optimised design, reducing costs and river impact. Gabion Baskets and rock mattresses were methods used to stabilise the riverbanks.
Sustainable Impact: CMC has developed detailed Environmental Management Plans to manage key environmental risks due to proximity to the Tweed River. Collaboration with the Department of Fisheries and the river and coastal team ensured quick permit approvals and minimized environmental impact.
Collaboration: CMC has a strong relationship with experienced design partners BG&E and the geotechnical team at FSG. Operating under a GC21 Collaborative D&C contract, we host regular Focus Group Meetings involving the client and other key stakeholders in a collaborative approach.
Community Engagement: Aware of the impact on the community, CMC aims to reopen the roads as soon as possible. We have maintained two-way traffic flow throughout the duration of the project to minimise disruptions and delays to the local residents. CMC and BG&E engaged with the Traditional Owners during the 30% design phase and throughout the project, incorporating their input to minimise environmental impact. A Welcome to Country Smoking Ceremony and cultural awareness workshops have fostered respect and collaboration.
By integrating collaborative, environmental, and community-focused strategies, CMC addresses landslips challenges and enhances the long-term resilience of the Tweed Shire community.
