This project, a remediation scheme to stabilise ancient mine workings on a stretch of railway in Cornwall, was awarded a High Commendation at this year's ICE Merit Awards.

A critical section of the line between Probus and Burngullow, ran over the old mine workings at Dowgas.  Tony Gee and Partners was appointed initially by Network Rail to examine the feasibility and relative risks of various options for stabilising the new double track alignment over the mine.  Following site investigation, the favoured option was to install heavily reinforced concrete slab below the ballast which is capable of supporting the worst credible subsidence condition.

Alfred McAlpine, working under the GWESPA alliance, continued TGP’s appointment for the detailed design. This included temporary and permanent track alignment to tie into the overall redoubling scheme enabling work to be switched from one track alignment to the other under a tight programme using only short possessions.

Want to know more?  Click here for a news story about the recent award this innovative scheme picked up.