A £500,000 restoration programme to prevent further erosion of the riverbank on the River Derwent is underway.
The Cumbria County Council project is aimed at securing the land between the river and the A596.
The road began eroding in 2009 when the county was hit by large floods, and has so far lost around 30 feet.
The work will involve placing 3,000 tonnes of limestone over a 100 metre stretch between Northside and Navvies Bridge.
– Keith Little, Cumbria County Council
"We must protect the A596 from the threat of further river erosion, which is why we're making this significant investment.
"We've been working hard to deliver a long-term solution that safeguards this important road."
Motorists are being advised that there may be some disruption on the A596 with one lane temporarily closing at Northside to allow for the unloading of heavy machinery.
The project is expected to take around 12 weeks to complete.