The slip and breakwater at St Catherine are being surveyed to determine the level of repairs needed to secure the structure.
Sections of the slip were damaged during Storm Ciarán, leaving large cracks and heavy erosion of the stonework at the lower end.
The survey will be completed using drones, ground penetrating radar and multi channel analysis of surface waves to assess the full extent of the damage.
Access to parking spaces, the breakwater and slipway will be restricted for a time while large pieces of equipment are being used.
Ports of Jersey says the work is essential before being able to plan any repairs, which will be undertaken once the results have been analysed.


Royal Square hosts Corn Riots Festival
2026 Customer Service Award winners announced
More fruit on the menu for Jersey primary schools
Consultation opens on Assisted Dying standards
More reports of young people exploring derelict buildings
Jersey man makes app to show best beach conditions
Haute Vallée installs security fencing after knife incident
Haut Du Mont trial: Safety Officer ‘would’ve stopped the job’ if told truth about test