Whiteball Tunnel desk study investigation

Following the formation of a large depression in the farmland above Isambard Kingdom Brunel’s Whiteball Tunnel on the Paddington – Plymouth mainline in Somerset, Crouch Waterfall were commissioned by Network Rail, via Balfour Beatty Rail, to undertake investigations into the possible causes for the potentially problematic feature. The project involved a site investigation and full desk study which identified the likely cause as being a former ventilation shaft.