Six weeks of tests are taking place underneath Kidsgrove station, after work to improve access had to be stopped.
Network Rail began an upgrade at the station in 2018 to install lifts at either side of platforms 1,2, 3 and 4 with the new footbridge linking the platforms, as part of the multi-million-pound 'Access for All' scheme.
But work had to pause on site earlier this year because of poor ground conditions, due to unmapped underground mine shafts.
Investigations will now take place to find out exactly what needs to be done so building work can resume.
Deborah Fairweather, Network Rail sponsor, said: “We understand the frustration to station-users at Kidsgrove who were looking forward to these much-needed improvements as part of Britain's Railway Upgrade Plan.
"We are working hard to restore this project and get it delivered, and these specialist surveys are the next step of that process.
"We are working closely with the station operator, East Midlands Railway, to ensure our work brings as little disruption as possible to passengers at the station.”
Neil Grabham, customer services director for East Midlands Railway, said: "We know our passengers and the local community are keenly awaiting the improvements at Kidsgrove and it is good news the project is again moving forward.
"Although the station will look different during these works there will be no changes to our services so our passengers can continue to travel with confidence and we look forward to the successful completion of the work."