The storms damaged the road surface and foundations at 3 sites:
- Gillot Hey
- Wood Cottage
- Alport
To maintain public safety and keep the road open, we reduced the carriageway to one lane, introduced a 20mph speed limit and installed traffic lights at all 3 sites.
To minimise any further damage to the road at the site of the landslips, HGVs over 7.5 tonnes are asked to follow a signed diversion route using the A6013 / A6187 / B6049 / A623 / A6 / A6015 / A624 and vice versa.
In May 2023, we carried out extensive repairs to the Gillot Hey and Wood Cottage sites. The traffic lights and temporary speed limit were removed and these sections of road were reopened to 2-way traffic.
The temporary traffic lights and 20 mph speed limit at Alport remain in place.
Since carrying out the repairs at Gillott Hey and Wood Cottage, we have noticed that the road surface is already showing some signs of movement. This is occurring much more quickly than in the past. We will continue to monitor these sites and may need to take action, including reinstating the temporary traffic lights and reduced speed limit.
At the Alport slip site, the road surface shows no signs of any movement. An initial survey report suggests extensive works are needed to strengthen the ground, using long steel piles. We don't have a cost for this work yet, but other similar work gives us an estimate of around £4million.
In addition to the slip at Alport, a full geotechnical survey of the entire Snake Pass route has also been commissioned to tackle the issue of reoccurring ground movement and landslips. This report will help identify potential solutions for the future of the sites affected by the landslips and set out costings. Once this report is received we will be building a business case for the funding to take to the government, as we don't have the money available for such large schemes.
The 12-mile section of the A57, known as Snake Road, is one of the highest roads in the Peak District.
Historical records suggest that landslips have taken place along the Snake Pass with closures dating back at least 90 years, with more than 30,000 vehicles each week including 1,500 HGVs using the road.