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Dorset slope failure risk road improvements planned

Dorset County Council has confirmed that work is set to start at Dinah’s Hollow near Melbury Abbas to improve traffic flow through an area at risk of slope failure.

The C13 road was closed for a period in 2014 after the council became concerned that a slope failure at the site could engulf a vehicle but was reopened under traffic control in 2015, although it has been subjected to a number of closures due to falling debris.

The council has said that work this month will improve traffic management with a pull-in and vehicle activated signed to allow HGVs to pass through the pinchpoint more easily.

Ground investigations undertaken by ESG (now Socotec) in 2014 showed that the the 15m high slope on one side of the road had a potential slip volume of 750t, and the 10m slope on the opposite side of the cutting has a potential of 380t slip, posing serious risks to road users.

Plans to stabilise the slope through soil nailing have yet to secure funding.

“When cabinet agreed that the advisory one-way HGV system should continue, we also committed to providing additional improvements to help traffic flow along these two very busy roads,” said Dorset County Council cabinet member for the natural and built environment Daryl Turner.

“This is still a medium-term solution. We are continuing to work with neighbouring authorities to push for a long-term solution for the north-south connectivity from the M4 to Poole Port to support Dorset’s economy.”

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