Tuntable Creek Road - Flood Recovery (Jan 2023)

Progress Update - January 2023

Tuntable Creek Road experienced significant damage during the February 2022 natural disaster. 11 notable landslips have been logged with a major landslip closing the road north of intersection with Rose Road. Prior to Christmas, works commenced on a temporary solution to open the road under traffic-controlled conditions. The temporary solution is subject to accelerated design development with geotechnical investigations occurring at the same time as the construction works.

To date the following works have been completed:

• Clearing of site for detailed geological mapping
• Drilling under geotechnical engineering supervision to determine failure mechanism and soil profile
• Installation of piezometers and inclinometers to monitor movement and ground water levels
• Construction of working platform below slip
• Completion of soil nailing and shotcrete below slip to retain the remaining road reserve

The works crew will remobilise to the site on Monday the 9^{th of} January. The next stages of the construction consist of:

• Excavate into the slope above the road
• Install 49 soil nails and 100m2 shotcrete
• Reconstruct pavement through the slip zone
• Install light traffic control and open one lane

Due to the volatile nature of the slip, care is being taken when undertaking these works ensuring safety for the construction team. The work method is under review and modified where required as the works progress based on data from testing and on-site observations. Innovative products are being trialled to reduce grout loss and staged excavations planned to reduce risk from adverse weather.

Currently a complete closure of Tuntable Creek Road, north of Rose Road to Beardow Road will remain in place. Including no access for pedestrians, motorbikes, scooters, and bikes. LCC and its contractors would like to thank the public for their patience with these works and also thank local property owners for their assistance.

The works are expected to be complete in February and further updates will be provided as the works commence on the upper slope.

The photos provided outline the road site and embankment failure before restoration works started.

Image 1 Road Site

Image 2 Embankment failure before restoration works

Pictures are also provided of the restoration effort including works performed by a 16-tonne hydraulic crawler mounted drill rig. This remote operated machine is designed for safe access to undertake geotechnical restoration works and is drilling around 8m into the embankment.

Image 3 Restoration works

Image 4 Restoration work

Additionally, to receive updates directly please contact Lismore City Council via email council@lismore.nsw.gov.au or call (02) 6625 0500 to register your preferred contact details and feedback. Please reference ‘Tuntable Creek Road’ in your correspondence.