Case study Mevagissey

The Problem
On the 28th January 2014, a landslide in the small Cornish village of Mevagissey caused part of the private road above and tonnes of soil, vegetation to envelope of the extension at the back of a small terraced property in Church Street.

After extensive negotiations, Insurers appointed Optera on a design and build basis to form a holistic solution to the problems faced. Investigations had been completed prior to our appointment and concluded that the failure was a combination of the build up of rainwater from a localised storm event coupled with the weight of vegetation on the slope.

Consequently, Optera set about designing a scheme which reduced the height of the vegetation whilst retaining the root structure, addressing issues of drainage and constructing a retaining wall with rock anchors which will prevent a re-occurrence of the situation. As part of the event, the road at the top of the embankment narrowed by over a metre in width and one resident had his car trapped for over a year.

The retaining wall was necessary to re-establish the width of the road and to provide permanent fall arrest and drainage provision to the road above.

The Optera Solution
Optera commenced work in September 2015 after the summer season. The village is very small and tourism dependant. Logistically this minimised the impact of the works on traffic and the local neighbours.

Optera completed the works in 12 weeks, on time and on budget. Whilst various changes were made to the design to cater for unforeseen ground conditions, these were accommodate within our budget and the project has been signed off as practically complete. The neighbours within the surrounding properties are delighted as they can now use the road above and the property in Church Street, directly affected is in the process of being repaired in readiness for renting.

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