Waterways officials are launching a £100, 000 project to improve Sprotbrough Lock.
The Canal and River Trust is replacing the 30-year-old canal lock gates at the 75 metre and seven metres deep lock.
The improvement scheme is part of a wider £45 million annual programme of restoration and repairs to historic canals and rivers across the country.
Members of the public are invited to a special open day next month to help celebrate the upgrade.
Jon Horsfall, waterway manager for the North East region, said: “This is the first time we’ve had the chance to hold an open day in South Yorkshire and it gives us a unique chance to show members of the public our preservation work and an understanding of what it takes to keep the waterways working.”
Simon Henry, campaign manager for the Canal and River Trust, said: “Sprotbrough Lock is the largest being worked on across the country during this winter maintenance period which runs between November and March.”
Workmen will be on site at the lock between February 2 and 28. The open day will be held on Sunday, February 16, from 10am to 4pm.