Contractors have been boring holes near the slips on the Whanganui River bank opposite the Aramoho Shopping Centre, the next step in finding out what to do with the site.
Whanganui Alliance performance manager David Lane said the bore samples were to confirm ground conditions.
"Once this is completed we will be able to finalise an engineering report with a recommended solution.
"The works will be undertaken by Whanganui District Council under an emergency works claim approved by Waka Kotahi."
A section of the footpath on Somme Pde near the slip site remains cordoned off.