The impact of Cyclone Debbie devastated the Lismore region back in April of 2017. Lismore City Council got in touch because they needed contractors fast.
After discussions with Council, we placed two project engineers in their construction team. Their role was to manage the delivery of seven civil engineering construction projects funded under the Natural Disaster Relief and Recovery Arrangements.
Each site required engineering solutions that addressed specific challenges:
Similar to the damage that took place on Terania Creek Road, the landslide at Tuntable Creek Road de-stabilised the pavement and shoulders along the embankment. Our reconstruction work involved creating a rock socket in the bedrock, pile driving “H steel” posts into concrete footings and successfully installing sheet piles and backfilling to increase stability.
Cyclone Debbie washed out the culvert on Mountain Top Road. A new bridge was needed, but before work could start, we had to design a side-track to ensure that traffic could still get through while the work was carried out.
We developed an engineering design solution for the landslip site on Beardow Street. However, during the works, we discovered the land contained contaminated soil. This meant we had to formulate a new plan straight away – so we could safely remove the contaminated soil and replace it with clean fill. We went on to successfully manage the rebuild of the embankment using rock and engineered fill.
During the April 2017 event, there was a substantial landslide 2km from Nimbin Road. Our engineering solution for this site included getting permission from the NSW government to provide one-lane access on Koonorigan Road before work commenced. We could then safely stabilise the embankment using soil nailing, Tecmat and Tecco Mesh. Finally, we reconstructed the road pavement using concrete and asphalt bunds to direct water flow, reducing the impact of flooding in the future.
Each of these remediation projects allowed us to showcase our engineering design solutions and project management skills. We were able to provide fast, cost-effective, and innovative solutions for Lismore City Council at each of the damaged sites.