Places   (Help with places, streets and buildings in Wigan.)

Yes about 30 foot square base, Large pillars are left in because the salt rock is very soft.I've been down them in a Ford transit van, very large operation, roadways and traffic lights plus enormous front loaders and dumpers. I believe they used Foden dumpers which were made in Sandbach Cheshire. The Foden dumpers were just left in the mine after their useful life, all repairs were done underground. They tried to bring one out for repair, in a very short time it rusted away in normal atmosphere combine with the salt, it was sat on the surface when I went there just a rotted shell.