Costain has confirmed that two workers were hurt in an incident on the A556 improvement project.
The contractor said the incident happened on the evening of Monday 3 August.
“An incident occurred where two contractors were injured, one seriously, while working on the A556 Knutsford to Bowdon improvement scheme on Monday evening,” said Costain in a statement.
“We are fully cooperating with the relevant authorities as a result of this incident and it is not possible to comment further at this time.”
Cheshire Fire and Rescue Service said it had been called to a report of a wall collapse in the area of the A556 construction project shortly before 5.30pm on Monday.
“Firefighters from Cheshire and Greater Manchester were called to a report of a wall collapsing on a scissor lift on a construction site,” said the fire service in a statement.
“Two site workers had suffered injuries and the crews assisted ambulance paramedics with trauma care. The casualties were taken to hospital.”
The A556 upgrade project includes construction of a new section of highway, and improvements to the existing A556 trunk road in Cheshire between M6 Junction 19, near Knutsford, and M56 Junction 7 near Bowdon. Costain will also improve the M6 southbound carriageway between M6 Junction 19 and Knutsford Services.